5 Best 1.6 GPF Toilet In 2026

If you want a toilet that balances water savings with solid flushing power, a 1.6 GPF toilet is hard to beat. GPF stands for gallons per flush. A 1.6 GPF toilet uses exactly 1.6 gallons every time you flush. That’s already a big step down from the old 3.5-gallon models from decades past.

The sweet spot is real. You save water compared to older toilets, but you still get a flush that actually works. No double-flushing. No clogs every other week. Just clean, reliable performance.

But here’s the catch — not every 1.6 GPF toilet is built the same. Some have amazing flushing systems. Some are easier to clean. Some are better for tight spaces. Some are ADA compliant. The list goes on.

That’s why we put together this guide. We tested and researched five of the most popular 1.6 GPF toilets on the market right now. We looked at everything — flush power, ease of installation, bowl shape, water efficiency, comfort, and long-term value.

By the end of this article, you’ll know exactly which toilet fits your bathroom, your budget, and your lifestyle.

Let’s get into it.

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Quick Comparison: Best 1.6 GPF Toilets at a Glance

Product	Type	GPF	Height	Best For
TOTO Drake CST776CSFG	Two-Piece	1.6	Universal	Overall best performance
American Standard Champion 4	One-Piece	1.6	Chair Height	Clog-free households
DeerValley Dual Flush	One-Piece	1.1/1.6	Standard	Water conservation
Eridanus Compact Dual Flush	One-Piece	1.1/1.6	ADA (17″)	Small bathrooms + ADA
Kohler Highline Classic	Two-Piece	1.6	Comfort Height	Budget-friendly + classic look

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Product Reviews: Best 1.6 GPF Toilets

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1. TOTO Drake Two-Piece Elongated 1.6 GPF Toilet — CST776CSFG#01

Overview

The TOTO Drake is one of the most well-known toilets in the plumbing world, and for good reason. This two-piece elongated toilet comes in cotton white and is built with TOTO’s signature TORNADO FLUSH technology. It also has CEFIONTECT glaze — a special coating that helps the bowl stay cleaner for longer.

If you want a toilet that performs consistently day after day without much fuss, this one deserves a serious look.

Key Features Explained Simply

TORNADO FLUSH System This is the star of the show. Instead of a straight-down flush, TOTO designed a cyclonic rinsing action. The water swirls powerfully around the entire bowl. This means waste gets cleared out completely in one flush. It also rinses the bowl walls at the same time, so grime has less of a chance to stick.

CEFIONTECT Glaze Think of this as a super-smooth protective layer on the porcelain. It’s an ion-barrier glaze that makes the surface so slick that bacteria, mold, and waste particles have almost nothing to grip onto. Less buildup means less scrubbing. That’s a real-world win for anyone who cleans bathrooms.

Universal Height The Drake sits at a “universal” height, which is roughly between standard and comfort height. It works well for most adults and older kids. It’s not quite chair-height, but it’s taller than a traditional bowl.

Elongated Bowl The elongated bowl shape gives you more sitting surface than a round bowl. Most adults find elongated bowls more comfortable, especially for longer sits.

Two-Piece Design The tank sits separately on the bowl. This makes shipping easier and repairs simpler. If the tank ever has an issue, you’re not replacing the whole unit.

Real-Life Usage Insight

In real bathrooms, the TORNADO FLUSH lives up to the hype. It handles heavy use well and rarely needs a second flush. The CEFIONTECT glaze really does reduce how often you need to scrub the bowl — the surface stays visibly cleaner between cleanings.

Installation is straightforward for anyone with basic plumbing experience. A professional plumber can get this done in an hour or less. The two-piece design makes it manageable to carry in pieces.

One thing worth knowing: this toilet does not come with a toilet seat. You’ll need to buy one separately. TOTO sells compatible soft-close seats, but that’s an extra cost to factor in.

Best Use Cases

• Main bathrooms in family homes
• Households where multiple people use the toilet daily
• Anyone who wants a powerful flush without wasting water
• People who hate scrubbing the toilet bowl

Performance

Flushing power is excellent. The cyclonic action is noticeably different from a standard flush. Water moves fast, wraps around the bowl, and everything goes down clean. There’s very little splashback and almost no residue left behind.

The toilet is also quiet for how powerful it is. You won’t hear a lot of noise compared to some older high-flush models.

Ease of Use

Very simple. Flush handle on the left side. Comfortable seat height. The elongated bowl suits most body types. Cleaning is easier than average thanks to the glaze.

Value for Money

This is a mid-to-high range toilet. You’re paying for TOTO’s engineering and the quality of the TORNADO FLUSH system. For households that want a long-lasting, low-maintenance toilet that consistently performs, the price is worth it. You’ll likely save time on cleaning and avoid the frustration of clogs.

Pros

• Tornado Flush is genuinely powerful and efficient
• CEFIONTECT glaze keeps the bowl cleaner longer
• Universal height works for most users
• Quiet flush for its power level
• Durable two-piece design that’s easy to repair
• Strong brand with good customer support

Cons

• Does not include a toilet seat
• Higher price point than budget alternatives
• Two-piece means a visible seam at the tank-to-bowl connection

Overall Rating: 9.2/10

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2. American Standard 2034314.020 Champion 4 One-Piece Toilet

Overview

American Standard has been a trusted name in plumbing for a long time. The Champion 4 is one of their most popular models, and the name tells you a lot — it was designed around a 4-inch flush valve, which is bigger than most standard toilets. That larger valve is what gives this toilet its reputation as one of the most clog-resistant toilets available.

This is a one-piece elongated toilet at chair height. It comes in white and includes a toilet seat. The Champion 4 uses 1.6 gallons per flush consistently.

Key Features Explained Simply

4-Inch Flush Valve Most toilets have a 2 or 2.5-inch flush valve. American Standard uses a 4-inch flush valve in the Champion 4. This creates a rush of water that moves faster and harder through the bowl. The result is a flush that can handle a lot. American Standard claims it can flush a bucket of golf balls — that’s their standard test for marketing, but what it really means is you’re unlikely to face clogs with normal use.

PowerWash Rim This is a rim-cleaning system that scrubs the bowl as you flush. Water sprays out from jets around the rim. It helps rinse away waste and reduces staining over time.

EverClean Surface Similar in concept to TOTO’s glaze, this surface treatment inhibits the growth of mold, mildew, and bacteria on the toilet surface. It keeps the bowl looking and smelling cleaner between deep cleanings.

One-Piece Design The tank and bowl are fused together. This makes the toilet look sleeker and more modern. It also eliminates the space between tank and bowl where dust and grime can build up on two-piece models.

Chair Height Chair height means the seat sits at roughly the same level as a standard chair — about 17 to 19 inches from the floor. This is the same as Comfort Height or ADA height. It’s easier to sit down and stand up, especially for taller adults and seniors.

Includes Toilet Seat This is a nice bonus. The seat that comes with it is a standard slow-close design. You don’t have to make an extra purchase.

Real-Life Usage Insight

The Champion 4 earns its reputation. Families with kids, heavy users, or anyone who has dealt with chronic clog problems will find this toilet a relief. The 4-inch valve is noticeably more powerful than typical toilets. Once water releases, it exits the tank fast and hits the bowl hard.

The one-piece design is easy to wipe down and looks clean. There are no gaps or crevices between the tank and bowl to collect dust.

One thing to note: one-piece toilets are heavier than two-piece models. You might want an extra set of hands during installation. It’s not impossible to do alone, but it’s awkward.

The toilet is also on the larger side physically. Measure your bathroom space before buying.

Best Use Cases

• Families with young children (less mess, powerful flush)
• Households that have dealt with frequent clogs
• Older adults who need a higher seat for easier standing
• Anyone who wants a sleek, modern one-piece look

Performance

Flush performance is outstanding. The 4-inch valve means water releases all at once rather than trickling out. This creates a single powerful surge. Very little ever gets left behind. You rarely need to flush twice.

The bowl stays cleaner than average between scrubbing sessions, thanks to the EverClean surface and the PowerWash rim doing its job on every flush.

Ease of Use

Very comfortable. Chair height suits most adults really well. The elongated bowl offers extra comfort. The included seat works fine out of the box.

Value for Money

The Champion 4 sits at a mid-range price point. For what you get — powerful flush, included seat, sleek design, EverClean surface, and chair height comfort — it offers solid value. Especially if you’ve been spending time and money on plumber calls for clogs with an older toilet.

Pros

• Massive 4-inch flush valve for clog-resistance
• Includes a toilet seat
• One-piece sleek design
• Chair height for comfort and accessibility
• EverClean surface inhibits mold and bacteria
• PowerWash rim keeps bowl cleaner

Cons

• Heavier than two-piece toilets (harder to install alone)
• Uses 1.6 GPF consistently — no dual-flush water savings
• Takes up more space than compact models
• Some users find the included seat basic

Overall Rating: 9.0/10

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3. DeerValley Elongated One Piece Toilet — 1.1/1.6 GPF Dual Flush

Overview

DeerValley isn’t as old a brand as TOTO or American Standard, but they’ve made a strong mark in the bathroom fixture space. This one-piece elongated toilet stands out because it’s a dual-flush model. You get 1.1 GPF for liquid waste and 1.6 GPF for solid waste. That flexibility makes it a great pick for households focused on water conservation.

It features a 10-inch rough-in, which is less common than the standard 12-inch. This is important — make sure you know your rough-in measurement before buying.

The design is modern and clean. The flush is quiet. And the price is competitive.

Key Features Explained Simply

Dual-Flush System (1.1/1.6 GPF) Two buttons on top of the tank. One is for a partial flush (1.1 gallons), one is for a full flush (1.6 gallons). Over time, using the partial flush for liquids saves a surprising amount of water. Households of two or three people can save thousands of gallons per year just by using the right flush for the right situation.

10-Inch Rough-In The rough-in measurement is the distance from the wall behind the toilet to the center of the drain in the floor. Most toilets use a 12-inch rough-in. This DeerValley uses 10 inches. If your bathroom has a 10-inch rough-in, this fills a gap in the market that’s hard to find. If you have a 12-inch rough-in, this toilet isn’t for you.

Quiet Flush Technology The flushing mechanism is engineered to minimize noise. If someone flushes at night, it won’t wake the house. This is especially useful in apartments or smaller homes where bathrooms are close to bedrooms.

One-Piece Modern Design No seams, no gap between tank and bowl. The whole unit looks clean and contemporary. Easier to wipe down during cleaning.

Powerful Rim Jet Flushing Despite the dual-flush water efficiency, the flushing system uses rim jets to create a strong wash around the bowl. Both the partial and full flush are effective at clearing the bowl.

Real-Life Usage Insight

The DeerValley dual-flush toilet rewards households that pay attention to how they use water. If you’re mindful about hitting the right button — partial for liquids, full for solids — the water savings add up fast.

Flushing power on the 1.6 GPF setting is on par with other standard single-flush toilets. The 1.1 GPF flush works well for liquid waste most of the time. Occasionally you might need to use the full flush for a more thorough rinse, but that’s normal for dual-flush systems.

The 10-inch rough-in is the biggest limitation. This toilet is specifically for bathrooms with that measurement. Don’t assume — measure your floor drain before ordering.

Installation is similar to other one-piece models. It’s manageable with basic DIY skills or a plumber.

Best Use Cases

• Eco-conscious households looking to reduce water bills
• Bathrooms with a 10-inch rough-in (this fills a real gap)
• Modern-looking bathrooms where sleek design matters
• Light-sleeper households where quiet flushing is a priority

Performance

The 1.6 GPF full flush handles solid waste cleanly and reliably. The 1.1 GPF partial flush is effective for liquid waste. The rim-jet system helps keep the bowl rinsed after each flush.

Noise is noticeably lower than average. That’s a real-world perk you’ll appreciate more than you expect.

Ease of Use

The dual-button flush on top of the tank is intuitive once you know which button does what (most dual-flush designs use a half-press or smaller button for the partial flush). Comfortable bowl height for average-height users. Elongated bowl provides good comfort.

Value for Money

Very good. You get a dual-flush system that saves water, a quiet flush, modern design, and a one-piece unit at a price that sits below the premium brands. For a 10-inch rough-in bathroom, this might be the best toilet at any price.

Pros

• Dual-flush saves real water over time
• Quiet flush technology
• Modern one-piece sleek design
• Competitive price
• Good flush power on both settings
• Fills the 10-inch rough-in gap in the market

Cons

• Only works for 10-inch rough-in bathrooms
• Less brand recognition than TOTO or American Standard
• Does not come with a toilet seat (check listing details)
• Dual-flush may be slightly less powerful than single-flush dedicated systems for heavy use

Overall Rating: 8.6/10

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4. Eridanus Compact One Piece Toilet — 1.1/1.6 GPF Dual Flush, ADA Height 17″

Overview

The Eridanus compact toilet is purpose-built for smaller bathrooms and users who need an ADA-compliant height. At 17 inches tall, it meets ADA standards for accessibility. The compact footprint means it fits in bathrooms where full-sized toilets would feel cramped.

It’s a dual-flush model at 1.1/1.6 GPF. The bowl is rimless — no hidden rim where bacteria hide. It comes with a soft-closing seat. The rough-in is 12 inches, which is standard.

This is a modern, thoughtful design that solves real problems for a specific group of buyers.

Key Features Explained Simply

ADA Compliant Height (17″) ADA stands for Americans with Disabilities Act. A 17-inch seat height is considered accessible for people with mobility challenges, the elderly, and those who use mobility aids. It’s also called “comfort height” in many listings. The higher the seat, the easier it is to sit down and stand up without straining.

Compact Design The tank and bowl are designed to take up less floor space than standard full-size toilets. This matters a lot in smaller bathrooms, half baths, and powder rooms where every inch counts.

Rimless Bowl Traditional toilets have a rim that curves inward around the top of the bowl. That hidden space under the rim is where bacteria, limescale, and mold love to grow. Rimless design eliminates that hidden ledge. Water flows directly from the flush and reaches the entire bowl surface. Cleaning is easier and more effective.

Dual Flush (1.1/1.6 GPF) Same concept as the DeerValley — partial flush for liquid waste, full flush for solid waste. Use the right flush for the situation and save water every day.

Soft Closing Seat The seat is included and it closes gently on its own. No loud slamming. The hinges slow the descent as the seat falls. Small feature, but you’ll miss it if you ever go back to a regular seat.

12-Inch Rough-In Standard rough-in. Works in the vast majority of U.S. bathrooms without any modification.

Real-Life Usage Insight

The Eridanus shines in compact or accessible bathroom settings. If you have a small powder room, a narrow bathroom, or a bathroom you’re building for an older family member, this toilet ticks a lot of boxes at once.

The rimless bowl is a genuine cleaning upgrade. Anyone who has scrubbed the underside of a standard rim knows how messy and frustrating it can be. With a rimless bowl, you can see and reach the entire interior surface. Cleaning goes faster.

Flush performance is solid. Both settings clear the bowl well in normal use. The water flow is directed well for a rimless design.

The soft-close seat is a quality-of-life improvement that new owners tend to really appreciate. Kids and spouses who slam the seat will no longer have that option.

Best Use Cases

• Small bathrooms and powder rooms
• ADA-compliant or accessible bathrooms
• Households with elderly family members
• Anyone who wants easy bowl cleaning
• Multi-generational households with both young kids and seniors

Performance

Flushing at 1.6 GPF handles solid waste reliably. The rimless bowl means water hits the entire inner surface each flush, which keeps things cleaner. The 1.1 GPF partial flush is appropriate for liquid waste.

For a compact toilet, performance is impressively close to full-size models. You’re not sacrificing power for size.

Ease of Use

The 17-inch height makes sitting down and standing up much easier than a standard-height toilet. The soft-close seat is effortless. The dual-flush buttons are clearly marked. Cleaning is simpler than average thanks to the rimless bowl.

Value for Money

Very good. You get ADA height, compact design, rimless bowl, dual-flush system, and a soft-close seat — all in one package at a mid-range price. For small or accessible bathrooms, this hits a sweet spot of features and affordability.

Pros

• ADA-compliant 17-inch seat height
• Compact footprint for small bathrooms
• Rimless bowl for easy, thorough cleaning
• Dual-flush saves water
• Soft-close seat included
• Standard 12-inch rough-in
• Modern design

Cons

• Less brand recognition
• Not ideal for large, open bathrooms where a standard size fits better
• Dual-flush may occasionally need a second flush for heavy use
• Some find the compact size slightly less comfortable than elongated full-size toilets

Overall Rating: 8.7/10

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5. Kohler 3493-0 Highline Classic Comfort Height Two-Piece Elongated 1.6 GPF Toilet

Overview

Kohler is one of the biggest names in bathroom fixtures in the U.S. The Highline Classic is their bread-and-butter toilet — reliable, classic-looking, widely available, and backed by one of the most recognized brands in the industry.

This is a two-piece elongated toilet at Comfort Height (chair height). It flushes at 1.6 GPF. It’s available in white and other finishes. It doesn’t come with a seat.

If you want a dependable toilet from a name brand you trust at a reasonable price, the Kohler Highline is worth a serious look.

Key Features Explained Simply

AquaPiston Canister Kohler uses a canister-based flush valve called AquaPiston. Traditional flush valves use a flapper — a rubber piece that lifts to release water. The AquaPiston canister allows water to enter the flush valve from 360 degrees all at once. This creates a more complete water release compared to single-direction flappers. The result is a consistent, strong flush every time.

Comfort Height (Chair Height) The seat sits at roughly the same level as a standard chair. This height makes it easier for adults and seniors to sit down and get up. It complies with ADA standards for toilet height as well.

Elongated Bowl More sitting room than a round bowl. Widely preferred by adults for comfort.

Two-Piece Classic Design The tank is separate from the bowl. Classic lines that fit in traditional, transitional, and modern bathrooms alike. Easy to service — if the tank internals need replacement, you can access them without replacing the bowl.

1.6 GPF Single Flush Every flush uses 1.6 gallons. No dual-flush option, but 1.6 is already a water-efficient standard.

Durable Construction Kohler is known for using quality vitreous china. This material is hard, smooth, and resistant to cracking under normal conditions. The build quality is reliable.

Real-Life Usage Insight

The Kohler Highline is exactly what it promises to be — a solid, dependable toilet without surprises. It’s not the fanciest toilet in this lineup, but it performs consistently and comes from a brand with a long track record.

The AquaPiston canister performs noticeably better than an old-fashioned flapper. The flush is reliable and thorough on each pull of the handle.

Comfort Height is well-suited for most adult households. If you have kids under 8 or 9, you might want to keep a step stool nearby since the height is a bit much for small legs.

The biggest advantage here is the Kohler brand backing. Replacement parts — seats, flappers, handles, trip levers — are widely available at hardware stores. If something breaks, you won’t struggle to find the right part.

Best Use Cases

• Homeowners who want a classic, timeless look
• Anyone who prefers a well-known brand for peace of mind
• Households looking for reliable performance without premium pricing
• Renovation projects that need a dependable standard toilet
• Anyone who values easy parts availability

Performance

Flushing performance is good and consistent. The AquaPiston system delivers a solid 1.6 GPF flush every time. It handles normal household use without issue. It’s not the most powerful flush in this list — the Champion 4 edges it out there — but it’s well above average and far better than old-generation toilets.

Quiet enough for overnight use. Not the quietest in this group, but not disruptively loud either.

Ease of Use

Comfort Height makes sitting and standing easy for most adults. Elongated bowl is comfortable. Handle is easy to reach and flush. Simple, intuitive design.

Cleaning is straightforward. Two-piece design means the tank-to-bowl junction can collect some dust, but it’s easy to wipe down.

Value for Money

Excellent. The Kohler Highline often comes in at a lower price than the TOTO Drake and the American Standard Champion 4, while still delivering reliable performance and the full Kohler brand backing. For budget-conscious buyers who don’t want to compromise on brand quality, this is a top pick.

Pros

• Kohler brand reliability and reputation
• AquaPiston flush valve for consistent performance
• Comfort Height for ease of use
• Easy parts availability at most hardware stores
• Affordable price compared to premium options
• Classic design that fits any bathroom style
• Elongated bowl for comfort

Cons

• Does not include a toilet seat
• No dual-flush option
• Not quite as powerful as Champion 4’s 4-inch valve
• Two-piece design shows a visible tank seam

Overall Rating: 8.5/10

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Comparison Insights: How These Toilets Stack Up

Flush Power

For raw flushing power, the American Standard Champion 4 wins. Its 4-inch flush valve is uniquely powerful among standard consumer toilets. The TOTO Drake comes second with its TORNADO FLUSH system — genuinely impressive and cyclonic.

The Kohler Highline sits in the middle with solid, consistent performance. The DeerValley and Eridanus are comparable to each other — their dual-flush systems are effective, but neither tops the dedicated high-power single-flush designs.

Water Efficiency

The dual-flush toilets win here. Both the DeerValley and the Eridanus let you use 1.1 GPF for light flushes, which adds up to real water savings over months and years. The other three all use a fixed 1.6 GPF per flush.

Ease of Cleaning

The Eridanus rimless bowl takes this category. Without the hidden rim, you can clean the entire bowl surface with no guesswork. The TOTO Drake’s CEFIONTECT glaze comes second — the coating means less buildup clings to the porcelain in the first place. The American Standard EverClean surface is a close third.

Value for Money

The Kohler Highline offers the best value if you want brand-name quality at a lower price. The DeerValley offers excellent value for what it includes, especially for 10-inch rough-in bathrooms. The Eridanus is great value for accessible or compact bathroom needs.

Design

One-piece designs (American Standard, DeerValley, Eridanus) look sleeker and more modern. Two-piece designs (TOTO Drake, Kohler Highline) are more traditional but easier to repair and service.

Who Gets a Seat Included?

The American Standard Champion 4 includes a toilet seat. The Eridanus includes a soft-close seat. The TOTO Drake, DeerValley, and Kohler Highline do not — budget for a seat separately.

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Buying Guide: How to Pick the Right 1.6 GPF Toilet

1. Measure Your Rough-In First

This is the most overlooked step. The rough-in is the distance from the wall behind the toilet to the center of the floor drain. Measure it before looking at any toilet.

Most U.S. bathrooms have a 12-inch rough-in. Some older homes and smaller bathrooms have 10 inches. Buying a 12-inch toilet for a 10-inch rough-in won’t work — the tank will hit the wall.

Among our picks, the DeerValley is for 10-inch rough-ins. The others use standard 12-inch rough-ins.

2. One-Piece vs. Two-Piece

One-piece toilets look cleaner and more modern. They’re easier to wipe down. They’re also heavier and usually more expensive.

Two-piece toilets are lighter (you carry the tank and bowl separately), easier to install with one person, and often cheaper. Replacement parts are easier to find.

For most people, both styles work fine. It comes down to preference and budget.

3. Bowl Shape: Elongated vs. Round

Elongated bowls are longer from front to back. Most adults find them more comfortable. They take up more floor space.

Round bowls are more compact. Better for tight bathrooms. Less comfortable for some adults.

All five toilets in this guide use elongated bowls.

4. Seat Height

Standard height is around 14 to 15 inches. Comfort height or chair height is 17 to 19 inches.

Comfort height works well for most adults and is easier for seniors and people with knee or hip issues. Standard height may be better for shorter adults and young children.

The Champion 4, Kohler Highline, and Eridanus are all at comfort or chair height. The TOTO Drake is universal height. The DeerValley sits at a standard height range.

5. Single-Flush vs. Dual-Flush

If you want the most water savings, go dual-flush. The DeerValley and Eridanus both offer 1.1/1.6 GPF options.

If you want maximum simplicity — just flush and be done — a single-flush 1.6 GPF model like the TOTO Drake, Champion 4, or Kohler Highline is perfectly fine.

6. ADA Compliance

If you need an ADA-compliant toilet for a family member with mobility issues, look for models with a seat height of 17 to 19 inches. The Eridanus (17″), Champion 4, and Kohler Highline all meet this standard.

7. What Comes in the Box

Always check what’s included. Some toilets don’t include a seat — you’ll need to buy one. The Champion 4 and Eridanus come with seats. The TOTO Drake, DeerValley, and Kohler do not.

Tank bolts, wax rings, and supply lines are usually sold separately. Budget for those.

8. Cleaning Preferences

If you hate cleaning the toilet, go for a model with surface treatment (CEFIONTECT, EverClean) or a rimless bowl. These features genuinely reduce how often you need to scrub and how hard you need to work when you do.

9. Brand and Parts Availability

TOTO, American Standard, and Kohler are the most established brands in this list. Their parts are widely available at plumbing supply stores and big-box hardware stores. DeerValley and Eridanus have a shorter track record, though their quality is good and parts are available online.

10. Budget

Set your budget before you start. Add the cost of a seat if the toilet doesn’t include one. Add wax ring, supply line, and any other hardware. If you’re hiring a plumber, add installation cost.

Don’t forget: a cheap toilet that clogs frequently or breaks sooner will cost you more in the long run than spending a bit more upfront.

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Who Should Buy These Toilets?

Buy the TOTO Drake if: You want the best overall performance and don’t mind spending a bit more. TORNADO FLUSH and CEFIONTECT are worth the price if you want low maintenance and powerful flushing.

Buy the American Standard Champion 4 if: You’ve dealt with clog problems and want a toilet that’s nearly impossible to clog. The 4-inch flush valve is exceptional, and the included seat is a nice bonus.

Buy the DeerValley Dual Flush if: Your bathroom has a 10-inch rough-in, or you specifically want to conserve water with a quiet dual-flush system and a modern look.

Buy the Eridanus Compact if: Your bathroom is small, you need ADA-compliant height, or you want a rimless bowl for easier cleaning. This one does a lot of work in a compact footprint.

Buy the Kohler Highline Classic if: You want a dependable toilet from a trusted brand at a reasonable price. Classic look, reliable flush, easy parts sourcing, and Kohler’s warranty make this a smart budget-to-mid-range pick.

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Common Mistakes to Avoid When Buying a 1.6 GPF Toilet

Not Measuring the Rough-In

This is the number one mistake. People buy a toilet without checking the rough-in measurement and then it doesn’t fit. Always measure from the finished wall to the center of the floor drain before buying.

Ignoring Toilet Height

People with knee or hip issues who buy a standard-height toilet end up struggling. If mobility is a concern for anyone in the household, go with comfort or ADA height. Likewise, if you have very young children, a very tall toilet isn’t ideal for them.

Forgetting to Buy a Seat

Some of these toilets don’t include a seat. TOTO, Kohler, and DeerValley don’t include one. Budget for this — and don’t just grab the cheapest seat. A soft-close seat is worth a few extra dollars.

Skipping the Wax Ring and Supply Line

These are the other components you need for installation. Most toilets don’t include them. You’ll need a wax ring (or wax-free seal) and a braided supply line. Buy these at the same time as the toilet.

Assuming All Flushing Power Is Equal

A 1.6 GPF rating tells you water volume, not flush force. The Champion 4’s 4-inch valve creates a more powerful surge than a standard valve, even at the same GPF. If flush power matters to you, look at valve size and flushing system, not just the GPF number.

Buying Based on Looks Alone

A beautiful toilet that clogs or splashes or is hard to clean will frustrate you every day. Match the toilet to your actual needs, not just your design preferences.

Not Checking the Return Policy Before Buying

Toilets are large, heavy items. If you order online and something is wrong or it doesn’t fit, returns can be complicated. Know the seller’s return policy before you buy.

Hiring the Cheapest Possible Installer

If you’re paying someone to install your toilet, don’t just grab the lowest bid. A poorly installed toilet can leak at the base, rock on the floor, or have a faulty connection. Those problems cause real water damage. Pay for someone who does it right.

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Final Verdict: Which 1.6 GPF Toilet Is Best?

After going through all five of these toilets in detail, here’s where we land:

Best Overall: TOTO Drake CST776CSFG The TORNADO FLUSH system is the best flushing technology on this list. CEFIONTECT keeps the bowl noticeably cleaner. Universal height works for most households. If you can stretch the budget, this is the top pick for most people.

Best for Clog-Prone Households: American Standard Champion 4 The 4-inch flush valve is uniquely powerful. If you’ve struggled with clogs before, this toilet is the fix. It also comes with a seat and sits at a comfortable chair height. Hard to beat for practical household use.

Best for Water Savings: DeerValley Dual Flush The dual-flush system with 1.1/1.6 GPF is the most water-efficient option in this group. Great for 10-inch rough-in bathrooms. Quiet and modern. A solid pick for eco-minded households.

Best for Small or Accessible Bathrooms: Eridanus Compact No other toilet on this list packs this many features into a compact, ADA-compliant form. Rimless bowl, soft-close seat, dual-flush, and comfort height in a footprint that fits small spaces. A standout for the right buyer.

Best Value from a Trusted Brand: Kohler Highline Classic Kohler delivers. The Highline Classic is reliable, backed by a big brand, and priced below the premium options. The AquaPiston valve performs well. Parts are everywhere. For buyers who want trusted quality without the highest price tag, this is the smart move.

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Frequently Asked Questions

Is 1.6 GPF enough flushing power for heavy use? Yes. A 1.6 GPF toilet, when properly designed, handles heavy household use easily. The key is the flush system — a good valve design like TORNADO FLUSH or the Champion 4’s 4-inch valve makes 1.6 GPF very effective.

Do dual-flush toilets clog more often? Not necessarily. The 1.1 GPF flush is for liquid waste, which doesn’t need heavy flushing. For solid waste, you use the 1.6 GPF setting. Used correctly, dual-flush toilets don’t clog more than single-flush models.

What is the difference between comfort height and standard height? Standard height seats are about 14 to 15 inches from the floor. Comfort height (also called chair height or ADA height) is 17 to 19 inches. Comfort height is easier for adults, seniors, and anyone with joint issues.

Do I need a plumber to install a toilet? Not necessarily. If you have basic DIY skills and the right tools, you can install a toilet in 2 to 3 hours. If you’re not comfortable with plumbing or this is your first time, hire a licensed plumber.

How long do 1.6 GPF toilets last? With proper installation and basic maintenance, a quality toilet lasts 15 to 25 years or more. The porcelain bowl rarely wears out — internal parts like the flapper, fill valve, and flush handle are what need occasional replacement.

Does a toilet seat always come with the toilet? Not always. Check the product listing carefully. The American Standard Champion 4 and the Eridanus in this guide include seats. The TOTO Drake, DeerValley, and Kohler Highline do not.

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Ready to make a decision? Use this guide to match your bathroom’s measurements, your household’s needs, and your budget to the right 1.6 GPF toilet. Any of these five will serve you well — it’s just a matter of finding the right fit for your situation.