I just bought a 2 yr old house and the toilet whistled everytime it was flushed. Bought me a Fluidmaster Whisper Fill Valve and Flapper. Installed the new fill valve but the flapper was not needed because this toilet bowl had a round plastic overflow pipe and the "round plastic flapper substitute" lifts up, the tank drains, then it settles down on a large red washer (about 3 or 4 inches in dia.) to stop any more water going into the toilet. The top of this fill pipe has a screw in cap that has a place to insert the refill tube. A short way down the pipe is a brackt sticking out from the pipe where the tank lever arm stick thru.
I have never seen this type overflow pipe before - hope I don't again - it leaks so very slowly in the washer area and then after enough water has leaked, the fill valve activates again. Think I finally got it to seat good enough that it doesn't appear to leak anymore.
What the heck is the name of this overflow pipe?
Can it be replaced (easly) with a standard fill pipe a standard flapper valve seat?
Thanks in advance.