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How to replace a commercial flush valve

Replacing a flush valve on a commercial toilet

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  • apb 1 Nov 10, 2008

    Thanks

  • fixitroll May 11, 2010

    I have to rebuild a flush valve (Zurn) can you help with instructions?

  • Anonymous Mar 18, 2014

    Whistling noise when I flush the toilet

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  • 374 Answers

These used to very simple but have become more complex as technogy evolves. I will give you the standard answer though.

First shut the water supply off to the aplliance (there is a little decorative cover on the valve that is attached to the water line coming out of the wall. It looks like a nut. Pop this cover off and screw the screw in remember right is closed and left is opened.)

Now it is only a matter of unscrewing the couple of nuts that attach the actual valve.

Most valves come with step by step instructions but even without them it is usually a 30 minute job or less. You will need a flat head screw driver, spud wrench, tubing cutters- to cut the chrome trim tube to size, and some pipe thread compound or teflon tape.
Thanks for using Fix Ya and if I can be of further assistance let me know.
Jim

Posted on Nov 10, 2008

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Posted on Jan 02, 2017

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Drain the tank (turn off the water supply and hold the flush valve open with your hand).

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follow this steps and fix it. God bless you

f the toilet bowl overflows, use a plunger or auger to eliminate clogs. If the toilet does not flush, tighten or replace the defective handle , adjust or replace the lift chain , or replace the flush mechanism . Jiggling the handle forces the lift chain or rod to re-seat the flush mechanism, telling you that something is awry.

If the bowl drains sluggishly, remove the clog with a plunger or auger, or raise the water level in the tank .

If water runs continuously through the toilet, lower the water level in the tank , adjust or replace a lift chain or wire , repair or replace a worn flush valve , clean or replace the valve seat assembly .

If water appears under the tank, tighten the tank hold-down bolts , lower the water level in the tank, replace the float valve , replace a malfunctioning ball or tighten nuts on the water supply line, replace leaking supply line . As a last resort, re-seat the toilet .

If the seat is cracked or unsightly, replace it .

If the bowl or tank is cracked or otherwise unacceptable, replace the entire toilet .

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1 Answer

Have a Duo Flush System from FluidMaster. It continuest to ghost flush. Have adjusted the float valve several times but is still ghost flushes. How can I stop this?


follow this steps and fix it. God bless you

f the toilet bowl overflows, use a plunger or auger to eliminate clogs. If the toilet does not flush, tighten or replace the defective handle , adjust or replace the lift chain , or replace the flush mechanism. Jiggling the handle forces the lift chain or rod to re-seat the flush mechanism, telling you that something is awry.

If the bowl drains sluggishly, remove the clog with a plunger or auger, or raise the water level in the tank .

If water runs continuously through the toilet, lower the water level in the tank , adjust or replace a lift chain or wire , repair or replace a worn flush valve , clean or replace the valve seat assembly .

If water appears under the tank, tighten the tank hold-down bolts , lower the water level in the tank, replace the float valve , replace a malfunctioning ball , or tighten nuts on the water supply line, replace leaking supply line . As a last resort, re-seat the toilet .

If the seat is cracked or unsightly, replace it .

If the bowl or tank is cracked or otherwise unacceptable, replace the entire toilet .

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The tank bolts do not get removed. The flush valve is mounted in a hole toward the rear of the tank. The nut under the tank is removed to allow removal of the flush valve from the inside of the tank. The replacement flush valve is inserted into the hole inside the tank and the nut is installed to fasten it in place

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Actually, it's the flush valve that's not closing. The ball operates the valve. In some cases the valve needs to be replaced; in others, the ball has absorbed water and is unable to close the valve completely.

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1 Answer

I have a Duravit Starck 2 toilet cistern which is approximately 5 yrs old, recently water from the cistern runs constantly into the bowl. I have renewed the flush value without any success. I would...


Did you replace the flush valve or the flapper?

There must either be a problem with the seal between the two surfaces of the flapper and flush valve or the flapper is being prevented by the flush system to returning to make a seal against the flush valve after the water completes draining during the flush cycle or more likely water is draining through the overflow tube.

Make sure the sealing surfaces are clean and not damaged.

Make sure the flapper is not being interfered with and is able to return to the closed position to make a complete seal against the flush valve.

Check adjustment of the water fill level to make sure the water is not filling above the water overflow. If the inlet valve does not shut-off when the level is adjusted to the proper level the water inlet valve may need replacing.

The following videos may prove helpful.


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2 Answers

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First things first, remove the fill valve, and the flush handle mechanism. This will give you plenty of room to work with the flush valve. Before installing flush valve lubricate tabs with plumbers grease. Now put on a pair of work gloves, pushed down very hard and turn the tabs should slide easy because of the grease. Remember do not alter the gasket, the gasket needs to be compressed to do its job. I know removing the fill valve and the flush handle seems like a pain, but there is no way to get your hands in the proper position to install the flush valve assembly.

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It sound like you have debris caught in the fill valve. Remove the top where the washer is and put your hand over it and slowly turn the water on to flush the fill valve. Replace the washer with a new one and then replace the top.

If you have the old ball and **** style, replaceing the diaphram is harder so I would recommend replacing it with a fluidmaster fill valve. Hope this helps.

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There is a small plastic tube that comes from the fill valve and attaches onto the overflow tube on the flush valve. If no water is coming out of that tube, then it is clogged internally. You can remove the tube from the fill valve and take a small piece of wire or a straight pin to try and clear it from the outside. If that doesn't work, then I would recommend replacing the fill valve. They are inexpensive to replace. If you don't know how to get into the fill valve's internal guts at the top, then I would recommend replacement of the valve. One more thing, there also could be a water saver where the outlet is on the little tube I just explained. It is usually light blue, you can remove that and discard it.

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