I've closely observed my toilet and it is using too much water per
flush. I watched the meter outside while my son flushed the toilet
and it used 6 gallons rather than the 1.6 gallons it should! Prior to
flushing and after the bowl is filled there is no movement at the
meter so I know it isn't leaking. After watching it flush I've
noticed the flapper takes a long time before it closes. I've adjusted
the chain float only to find it doesn't make a difference. There
seems to be water and/or bubbles coming up through the drain hole in
the tank and it keeps the flapper open for a long period of time.
Only after about 30 seconds does the flap close and begin filling the
tank again. What can be done to resolve this? Where could the water
or bubbles be coming from?
On Fri, 21 Oct 2011 18:57:05 -0700 (PDT), "hr(bob) email@example.com"
Why? The toilet has a drain and as long as water runs, it will drain.
Aside from the 1.6 gallon used in a flush, the bowl also has more
If the flapper is staying open, the fill will just keep dumping water
down the hole, into the bowl and down the drain. The OP has to find
what is causing it to hang up or replace it completely.
@Corbett and Kerri:
Is your toilet new or an older one ?
Replacing the flapper and fill valve in an older toilet won't make it
Sounds to me like you are reading something wrong, as you would
need a REALLY large pipe to be using 6 gallons in 30 seconds of
Are you absolutely certain that nothing else connected to the
water was operating when you were checking the meter ?
Don't some flappers have a water counterbalance to hold the flapper open.
Water drains out thru a hole until it gets light enough to let the
flapper flip shut. Maybe the hole is plugged?
12 GPM does sound excessive.
I'd run two experiments.
1) Hold the float until the tank drains and the flapper closes.
Then measure the amount of water to fill the tank. If there's a
path around the flapper during the fill, like there is in my old
toilet, that volume may be set way too high.
2) Close the source valve to reduce the flow during the fill.
That should reduce the amount flowing thru the open flapper.
The results of those two experiments may help you discover
I've performed similar experiments:
1. Water source valve turned off, the toilet flushes normally.
2. Adjust the float too high and the flapper closes within 5 seconds.
It never has enough time for the siphon to start but it shows that the
flap moves freely.
There is some sort of backflow coming up through the drain that is
keeping the flapper open for an longer than normal time. The bubbles
coming up through the drain hole don't start until the siphon process
Based on all of this, I'm thinking the toilet is clogged causing the
refill water to backup and keep the flapper open. I guess it's time
for a new toilet.
On Friday, October 21, 2011 6:20:49 PM UTC-7, Corbett and Kerri wrote:
This happened to me when my husband changed the flapper....what he also did was turn the water on to the toilet at almost fully open.....I turned down the water to the toilet and presto....my problem was fixed.....
On Wednesday, December 10, 2014 11:46:40 AM UTC-5, firstname.lastname@example.org wrote:
How far opened the supply valve is should have very little effect on
the water used per flush. If anything, I would think having the supply
valve partly closed could increase the water used. While it's filling
some water is sent down the overflow tube to help completely fill the
bowl. The longer it takes to fill the tank, the longer that water is
going down the overflow tube and once the bowl is full, it's going down
the sewer. With the valve partially closed, that flow rate is reduced
too, but I would think it still could wind up using more if the tank takes
a long time to fill. But overall, I don't see a way that choking off the
supply line saves water per flush.
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