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TOTO Drake 1.28 vs 1.6 GPF

Every TOTO Drake uses the same TORNADO FLUSH system and CEFIONTECT glaze. The 1.28 and 1.6 GPF versions differ only in how much water each flush uses.

The 1.28 GPF model is WaterSense certified and legal in all 50 states. The 1.6 GPF model moves more water, which can help on long or sloped drain lines, but is banned in about a dozen states.

Toto Drake 1.28 vs Toto 1.6 GPF


What is the difference between the 1.28 and 1.6 GPF TOTO Drake?

The 1.28 and 1.6 GPF TOTO Drake are the same toilet with different flush volumes. Both use TORNADO FLUSH with dual nozzles, both carry CEFIONTECT glaze, and the bowl is identical. The 1.28 GPF version uses about 20 percent less water, is EPA WaterSense certified and is legal everywhere in the United States. The 1.6 GPF version is restricted in roughly a dozen states, including California, Texas and Georgia.

Same on both
Bowl, flush system, glaze
Water per flush
1.28 vs 1.6 gallons
Legal everywhere
1.28 only
Models in stock
20 vs 3

Which flush volume should you be looking at?

Most of the Drake range is 1.28 GPF — around 20 models, including every WASHLET+ configuration except one. Only three Drake models are 1.6 GPF.

Drake 1.28 GPFFrom $514
About 20 models · WaterSense certified

The default choice and the bulk of the range. Legal in all 50 states, often eligible for utility rebates, and available with every WASHLET+ tier from S2 to S7A.

Choose 1.28 GPF if…
  • You live in a state that mandates 1.28
  • You want a WASHLET+ model below S7A
  • You want to qualify for water rebates
Browse Drake toilets
Drake 1.6 GPFFrom $482
3 models · federal maximum

More water per flush, which some plumbers prefer for long horizontal or sloped drain runs and older homes. Sold at the federal maximum, so it cannot be shipped to every state.

Choose 1.6 GPF if…
  • Your drain line is long or sloped
  • Your plumber has recommended more volume
  • Your state has no 1.28 requirement
Browse Drake toilets

How do the 1.28 and 1.6 GPF TOTO Drake compare?

The bowl, flush system and glaze are identical. Water use, certification and availability are not.

How do the 1.28 and 1.6 GPF TOTO Drake compare?
  Drake 1.28 GPF Drake 1.6 GPF
Water per flush 1.28 gallons 1.6 gallons
Water use vs the other About 20% less About 25% more
Flush system TORNADO FLUSH TORNADO FLUSH
CEFIONTECT glaze Yes Yes
Bowl and tank Identical Identical
WaterSense certified Yes No
Legal in all 50 states Yes No, restricted in ~12
Utility rebates Often eligible Not eligible
Models in stock About 20 3
Price from $514 $482

Which Drake configurations come in each flush volume?

Every WASHLET+ tier is available at 1.28 GPF. Only the S7A is offered at 1.6 GPF.

Which Drake configurations come in each flush volume?
  Drake 1.28 GPF Drake 1.6 GPF
Toilet only $514 $482
With S2 washlet $938 Not available
With S5 washlet $1,075 Not available
With S7 washlet $1,590 Not available
With S7A washlet $1,756 $1,757

Which TOTO Drake should you buy?

Four situations and the model that fits each, or browse the whole Drake range.

TOTO Drake Two-Piece Toilet - Universal Height, Elongated - White toilet with separate tank on a white background
LEGAL EVERYWHERE
Drake 1.28 GPF Universal Height
$514.54
WaterSense certified, universal height, ships to all 50 states.
TOTO Drake Two Piece Toilet - White toilet on a white background
LOWEST PRICE
Drake 1.6 GPF
$482.19
The cheapest Drake. Check your state allows 1.6 GPF before ordering.
TOTO Drake WASHLET+ S5 Two-Piece Toilet - 1.28 GPF - White toilet on a white background
BEST VALUE WITH WASHLET
Drake WASHLET+ S5, 1.28 GPF
$1,075.39 $1,419.00
Tankless warm water, heated seat and dryer for under $1,100.
TOTO Drake Washlet+ S7A Two-Piece - White toilet with a closed lid on a white background
ONLY 1.6 WITH A WASHLET
Drake WASHLET+ S7A, 1.6 GPF
$1,757.00 $2,510.00
The single 1.6 GPF Drake available with a bidet seat fitted.

Should you buy the 1.28 or 1.6 GPF TOTO Drake?

This is not a comparison of two toilets. It is the same Drake with a different flush valve. The bowl, the TORNADO FLUSH nozzles and the CEFIONTECT glaze are identical, so bowl cleaning and rinse quality do not change between them.

Start with where you live. Around a dozen states cap toilets at 1.28 gallons per flush, including California, Texas, Colorado, Georgia, Washington, New York, Hawaii and Vermont. In those states the 1.6 GPF Drake is not a legal option and the decision is already made.

If you are not in one of those states, the case for 1.6 GPF is plumbing rather than preference. Long horizontal runs, sloped drain lines and older cast iron can benefit from the extra volume carrying waste further down the line. If your current toilet works fine and your drains are modern, that extra water is not buying you anything.

Price is close to irrelevant here. The 1.6 GPF Drake starts $32 cheaper as a bare toilet, and at the S7A washlet level the 1.28 version is actually a dollar less. Neither difference should decide this.

Availability is the real constraint. Around 20 Drake models are 1.28 GPF and only three are 1.6 GPF. If you want a WASHLET+ model at S2, S5 or S7, there is no 1.6 GPF version — the only 1.6 GPF combo is the S7A.

For most homes, 1.28 GPF is the sensible pick. It is legal everywhere, often qualifies for a water utility rebate, and gives you the full range to choose from. Consider 1.6 GPF only if your plumber has specifically recommended more volume and your state permits it. If you want to go the other way, the Drake II 1G models flush at just 1.0 gallons.

Frequently Asked Questions

  • Only the amount of water used per flush. Both versions share the same bowl, the same TORNADO FLUSH system with dual nozzles and the same CEFIONTECT glaze. The 1.28 GPF version uses about 20 percent less water and is EPA WaterSense certified.

  • For the vast majority of homes, yes. TOTO's TORNADO FLUSH is designed around the lower volume and the Drake range is well regarded for clearing waste in a single flush. Extra volume mainly helps with long or sloped drain runs rather than with everyday use.

  • Around a dozen states cap toilets at 1.28 gallons per flush. Confirmed examples include California, Texas, Colorado, Georgia, Washington, New York, Hawaii and Vermont. Requirements change, so check your state or local plumbing code before ordering a 1.6 GPF model.

  • Barely. As a bare toilet it starts about $32 less. With an S7A washlet fitted the 1.28 GPF version is actually about a dollar cheaper. Price should not drive this decision.

  • Only one configuration. The S7A is the single 1.6 GPF Drake sold with a washlet fitted. The S2, S5 and S7 WASHLET+ models are all 1.28 GPF.

  • Often. Many water utilities offer rebates for installing an EPA WaterSense certified toilet, which requires a flush rating of 1.28 gallons or less. The 1.6 GPF version does not carry WaterSense certification and is not eligible.

  • About 0.32 gallons per flush against a 1.6 GPF model, roughly 20 percent. The saving is far larger if you are replacing a pre-1994 toilet, which may use 3.5 gallons or more per flush.

  • Yes. The Drake II 1G models flush at 1.0 gallons per flush, the lowest in the Drake family. They are available with S7 and S7A washlets.

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