What gpf toilet should I get?



How many GPF do you need for a toilet?

Toilet water use standards



Toilets manufactured before 1982 use 5 to 7 gpf. Washington State code now requires that all new manufactured toilets use no more than 1.28 gpf. Toilets that use less water and also meet performance criteria may have a WaterSense label if they use 1.28 gpf or less.

How do I choose a GPF toilet?

Maximum performance (MaP) testing conducted by independent agencies determines how much solid waste a toilet can handle. A rating of 350 to 600 grams for a 1.6-gallon flush is good, although some toilets can handle up to 1,000 grams (2.2 pounds!) using only 1.28 gpf.

What is the difference between a 1.28 and 1.6 gpf toilets?





A 1.28 GPF toilet uses 1.28 gallons of water per flush while a 1.6 GPF toilet uses 1.6 gallons per flush. 1.28 GPF toilets are therefore more water efficient than 1.6 GPF toilets but none is necessarily better at flushing than the other.

Are all toilets 1.6 gpf?

While modern toilets are limited to just 1.6 GPF, you can get models with a pressure-assist unit that can flush a 1.6-gallon tank with the force of a 5.5-gallon flush. Just keep in mind that these units are noisy and only work in toilets that are designed for pressure-assist units.

When did toilets go to 1.28 gpf?

A little necessary background: Before 1993, toilets used 3.5 gallons per flush (gpf). In 1994, all new homes were required to have water efficient toilets that averaged 1.6 gpf and now high-efficiency toilets (HETs) go as low as 1.28 gpf, with some even using as little as 1.0 gpf.

How many gallons per flush is good?

1.6 gallons





Generally speaking, the older the toilet, the more water it uses. Toilets built before 1982 use 5 to 7 gallons per flush. Now, toilets are designed to flush using only 1.6 gallons of water.

Is 1.28 gpf low-flow?

If the stamp reads “1.6 gpf or 1.28 gpf,” your toilet is already a current low-flow model. Take off the lid and check for a flush volume stamp or a date stamp inside the tank. The stamp may be on the walls of the tank or on the lid itself. Look for model numbers and brands, you may be able to find it online.

Is it better to buy a one piece or two piece toilet?

One piece toilets are typically heavier and easier to clean, and there’s less space for bacteria to grow. Because two piece toilets feature a detachable tank, they’re more customizable for preferred styles and heights. Both styles can include bells and whistles like bidet attachments or low-flow energy saving.

How do I know if I need a 10 or 12 rough in toilet?

If the old toilet is still there, measure from the center of the capped bolts (on the bottom) to the wall (not the baseboard). There should be 24 inches of clearance from the wall facing the bowl and 15 inches on each side as a guideline. If your measurements are between 11.5 and 12.5 inches, it is a 12-inch rough-in.

What is the highest gpf toilet?

With the maximum toilet gallons per flush (gpf) reduced from 3.5 to 1.6 and now to 1.28 gpf in several locations, what effect is this having on drain line carry and also flushing of existing drain pipes that are generally 4″ in diameter?



Are 1.6 gpf toilets allowed in California?

Under the new mandatory standards, even more efficient than the EPA’s voluntary ones, toilets sold in the state can’t use more than 1.28 gallons per flush. Current low flow toilets use 1.6 gallons. For faucets, ones in the bathroom will be cut to 1.2 gallons per minute, the current standard is 2.2 gallons.

What determines toilet flushing power?

If your toilet lacks the proper flushing power and you’re looking for a solution, you’ve come to the right place. Toilets usually lack flushing power because the waste pipe, siphon jet, or rim jets are partially clogged, or the water level in the tank or bowl is too low.

Do low-flow toilets clog more easily?

Why do low-flow toilets get clogged more easily? Low-flow toilets, especially older models, can end up getting clogged easily. This is because they use less water, 1.2 gallons, compared to a standard toilet, which uses 1.6 gallons per flush.

Are low-flow toilets worth it?

The EPA estimates that homeowners save as much as $110 per year on their water bills simply by switching to low-flow toilets. You should recoup your initial investment and save even more money the longer you use a low-flow toilet. Low-flow toilets can last up to 30 years without being replaced.

Are all new toilets low-flow?

Since 1992, U.S. law has mandated that new toilets sold in the United States be low-flow or low-flush, which means that they consume no more than 1.6 gallons (6 liters) per flush.



What is the highest GPF for toilets?

With the maximum toilet gallons per flush (gpf) reduced from 3.5 to 1.6 and now to 1.28 gpf in several locations, what effect is this having on drain line carry and also flushing of existing drain pipes that are generally 4″ in diameter?

What does it mean 1.28 gpf toilet?

A 1.28 GPF toilet uses about one-third of a gallon less with each flush than a standard 1.6 GPF toilet. So, how does that add up to real-world water conservation? Well, the average American flushes the toilet about five times per day, which accounts for approximately one-quarter of their daily water usage.

How can I make my low flow toilet flush better?


Quote from video: The one thing you can do is just hold the lever down longer and a lot more water will flow from the tank to the bowl to get a better flush.

What does 6.0 LPF toilet mean?

Some models prefer to use an LPF measurement instead, which stands for “liters per flush.” The requirement is the same as the GPF requirement. The current standard is 6 liters per flush. Older toilets can use much more water. Toilets that are up to 10 years old may use 2-4 gallons per flush.

Are low-flow toilets worth it?

The EPA estimates that homeowners save as much as $110 per year on their water bills simply by switching to low-flow toilets. You should recoup your initial investment and save even more money the longer you use a low-flow toilet. Low-flow toilets can last up to 30 years without being replaced.



Are all new toilets low-flow?

Since 1992, U.S. law has mandated that new toilets sold in the United States be low-flow or low-flush, which means that they consume no more than 1.6 gallons (6 liters) per flush.