THE PROJECT
1. Unhook the chain or unscrew the lift wire from the flush lever.
2. Pull off the flapper from the overflow tube. It may be hooked in place with “wings” on either side of it, or have a large thick ring that will be pulled up and over the overflow tube.
3. Clean the tank outlet (flush valve) with a scrubber pad or steel wool to remove any mineral buildup. The valve should be smooth, not pitted, in order for it to seal properly. If there are cracks in the valve seat, it must be replaced.
4. To install the new flapper, first make any modifications to the replacement flapper as recommended by the manufacturer (if it’s not an exact replacement).
5. Attach the flapper to the overflow tube making sure that it drops directly over the valve seat. Raise and lower the stopper to make sure it’s attached properly.
6. Attach the chain or lift wire to the flush lever.
7. Trip the flush lever to see if the chain or wire is in the proper position or length. With the flapper in the closed-down position, the chain should neither be taut nor have too much slack. Be aware that the flush lever should not hit the tank lid when flushing; if it does, shorten the chain and remove excess chain links.
8. Turn on the water, let the tank fill, and give it a test flush.
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