Tip & How-To about Plumbing

How to fix a refill valve

  • Brass-style toilet refill valves can often be repaired. To take a valve apart, remove the lever's screws. This allows you to lift out the float arm and valve plunger. Check the flat rubber washer on the end of the plunger. If it's worn, you can pull it out with pliers and either turn it around or replace it. This procedure usually corrects an overfilling problem. Next, reassemble the valve. If the tank continues to overfill, check to make sure the operating lever at the end of the float arm is functioning properly.

  • New refill valve. To replace the entire refill valve assembly, first turn off the water supply. The tank should then be flushed and sponged out, as detailed previously. Remove the inlet nut and riser tube from the bottom of the refill valve beneath the tank. Hold the refill valve inside the tank with a padded locking plier/wrench to keep it from turning, and remove the nut beneath the tank. With the nut off, the refill valve assembly can be lifted out and a new one inserted in its place. Follow the exact instructions included with the unit you purchase.

  • Finally, reconnect the riser tube and turn the water on. The tank should fill, allowing you to adjust the water level according to the instructions that were included with the valve.

  • Anti-siphon valves. The best refill valves offer anti-siphon protection. In fact, this may be a requirement. This protection prevents back siphonage of toilet tank water into your home's potable water supply system if a vacuum occurs in the toilet's water supply system. Whether or not this is a code requirement, the anti-siphon valve is a good idea to protect your family and public health.

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1 Answer

Why do i have to hold my toilet lever to flush?


Hi Nathan:
If you lift the tank lid off and flush the toilet you will see that a flapper valve lifts to let the water drain from the tank. The flapper valves are designed to stay in the closed position when the tank fills, but to float when the tank is flushed.
The problem will probably be that the flapper valve no longer floats due to saturation with water, or a leak that has allowed water inside the float.
The fix is to replace the float valve. Parts are available at most hardware and plumbing supply stores.
Cheers

Apr 13, 2016 | Home

2 Answers

my new toilet fill valve stops when the float rises but after an hour the water rises to over flow


It sounds like the valve is not shutting off fully as it must.
If the instructions explain how to flush the valve before you put it into service, do that again.
Otherwise, I'd take it back.
Gary

Feb 25, 2011 | Saniflo Home

1 Answer

The toto toilet keeps running over the overflow tube in the tank. I cleaned the valve which worked for a while but now is back to running. Should I replace the gravity valve?


If you can lift the float arm and it stops the water flow into the tank then the float arm needs to be adjusted. The proper adjustment will stop the water flow when the level is between 3/4" and 1" from the top of the overflow tube. The newer style valves have an adjustment screw that is easily located and can be adjusted without any dis-assembly.

Feb 19, 2011 | Toto Home

1 Answer

I have a toto toilet that doesn't start to refill until a couple of minutes after I flush. Any ideas. Thanks.


Several ideas. Start to fill? Have you looked inside the tank to see what's going on? If it just filling very slowly, then you most likely have some calcuim build up inside your flush valve blocking some flow, if this is the case you will have to clean the flush valve. If your flush valve is staying up and the toilet is "running" unitil the float drops. The float (either the arm ballcock style, or newer fluidmaster) is rubbing on either the flush lever or side of the tank, and taking longer to drop to let the water start flowing. I

Jun 23, 2010 | Toto Toilets ST784S 12 Sedona Beige...

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