4.8 Lpf toilet actually uses more water

[psommerfeld]

Has anyone noticed this?
I have a 4.8 Lpf American Standard and I carefully filled the tank after flushing it to below the overflow tube. That amount of water is 5.6 L. Why is the toilet flushing more than 4.8 L?
I noticed another 4.8 L toilet I have flushes about 6 L, as measured by the house water meter.
Has anyone done a careful measurement on how much water a HET actually flushes?

 

[havasu]

Are you adjusting to the recommended water level on the side of the tank?

 

[Twowaxhack]

Do you have all the original parts in the toilet ?

 

[havasu]

I guess until the OP responds to answer questions, we are just talking to ourselves. Another thing I just thought of is the fact that when a toilet flushes, not all of the water evacuates from the tank. Most tanks still retain at least a liter of water at the end of the flush.

 

[BlueSkyHigh]

(If I could I'd adjust mine to 6.0 gpf.)

 

[Ludington]

I have just the opposite problem, mine does not let enough water out to properly refill after a flush. Have to hold the handle down fir a couple seconds. No real fix that I know of.. chain is as tight as it gets for maximum hight on pulling the center tube up. Don't know why it falls back down that quick.

 

[CT18]

Some new toilets you do need to hold the handle down. I have a few Toto and one American standard, and they all require the handle to be held

 

[havasu]

Get an adjustable flapper. They stay up longer.

 

[BlueSkyHigh]

Get an adjustable flapper. They stay up longer.

Maybe that was the design intent to limit the use of water much like the gosh-darned auto stop/start function on my Jeep allowed them to meet mileage standards. I turn it off every time I get into my car but, unlike other options, there's no way to permanently turn it off!

 

[Ludington]

Get an adjustable flapper. They stay up longer.

Not with this type.. kohler...
Used to be fine... but now not so much.