Hi all, I am a new homeowner so please bear with me. I first noticed a hissing sound coming from the toilet tank and the the tank was filling very slowly. I opened up the fill valve, inspected the seal, and noticed that the seal had a small crack/hole in it.
Easy peasy, I thought. Seeing that the fill valve was a Fluidmaster brand, I purchased a universal Fluidmaster fill valve seal. But when I popped the new seal in place, the toilet wouldn't stop running. Water was continuously overflowing into the overflow tube. There is no leakage from the flapper valve.
But then, when I put the old, damaged seal back in place, while the tank was still taking extra long to refill, the flow shut off at the correct level. No overflow into the overflow tube, no continuously running water.
I tried wiping the area around the fill valve seal to clear any debris, I've also flushed the fill valve by running the water into the toilet tank while the fill valve cap/seal assembly was detached, I also tried purchasing a second Fluidmaster fill valve seal in case the first one was defective, and none of these steps fixed the problem.
Comparing the old fill valve seal to the new fill valve seal, the old seal appeared to have a bit more give around the nipple, but that could also be due to the damage since the crack is at the base of the nipple. The old seal also has the numbers "110" printed on it, while the new seal does not. The old seal has grooves in the rubber, but that also could be deterioration from being in the fill valve assembly.
The fill valve cap has "Fluidmaster" printed in the plastic along with "01818ZA".
Is the universal Fluidmaster fill valve seal the wrong seal to use here? I can't seem to find any info on the Internet about any other kind of seal. See pics for more.
Thank you for reading!