I have a Toto Eco Drake with the Korky style fill valve. Toilet was purchased/installed in 2015. About a year after installation, the fill valve was hissing. I tested to see if water was leaking into the bowl, didn't find anything, and replaced the R528 cap and cleaned the green filter and float chamber valve. That solved the issue, but my water pressure was around 120psi and I figured that was one of the reasons for early failure.
I installed a PRV and reduced water pressure to 72psi. I know that's still sometimes considered high (though code is <80psi), but I wanted to minimize the change from being used to 120psi.
A week ago I noticed the fill valve randomly running (not after a recent flush). Replaced the cap with a new one, but that didn't fix it. I tested and found the tank water level dropping and a VERY slight trickle of water down the sides of the bowl. Replaced the flapper with a Korky 2023BP set up correctly (flapper setting and chain length). That solved the issues...until...
A week later (yesterday and today), the fill valve isn't turning off completely after most flushes. Water isn't leaving the tank, so the new flapper seems fine. I replaced the cap AGAIN three times (two brand new ones, and the one I put in there a week ago when it was really a flapper issue with no luck.
I took the fill valve apart again and cleaned it well. No change. I ran the fill valve without the green cover on it and when it mostly turns off, water is spraying from the little hole on top of the R528 cap. If I ever so slightly lift the float or push down on the float arm, it stops. But as soon as I release, it starts hissing and spraying a bit of water. If you leave it for a few minutes, sometimes it shuts off completely and stays off.
I took it apart AGAIN and looked at the float. I'm thinking maybe the little rubber pad is worn out? It has a decent little dent (see picture below). Can this be replaced? I have a Toto/Korky 528GT fill valve that I bought as a spare, but I don't really want to swap out the OEM fill valve if I don't have to. I read that the "only wear item" in these valves is the cap, so I'm confused why I'm having so many issues!
Thanks in advance for any help/tips!
I installed a PRV and reduced water pressure to 72psi. I know that's still sometimes considered high (though code is <80psi), but I wanted to minimize the change from being used to 120psi.
A week ago I noticed the fill valve randomly running (not after a recent flush). Replaced the cap with a new one, but that didn't fix it. I tested and found the tank water level dropping and a VERY slight trickle of water down the sides of the bowl. Replaced the flapper with a Korky 2023BP set up correctly (flapper setting and chain length). That solved the issues...until...
A week later (yesterday and today), the fill valve isn't turning off completely after most flushes. Water isn't leaving the tank, so the new flapper seems fine. I replaced the cap AGAIN three times (two brand new ones, and the one I put in there a week ago when it was really a flapper issue with no luck.
I took the fill valve apart again and cleaned it well. No change. I ran the fill valve without the green cover on it and when it mostly turns off, water is spraying from the little hole on top of the R528 cap. If I ever so slightly lift the float or push down on the float arm, it stops. But as soon as I release, it starts hissing and spraying a bit of water. If you leave it for a few minutes, sometimes it shuts off completely and stays off.
I took it apart AGAIN and looked at the float. I'm thinking maybe the little rubber pad is worn out? It has a decent little dent (see picture below). Can this be replaced? I have a Toto/Korky 528GT fill valve that I bought as a spare, but I don't really want to swap out the OEM fill valve if I don't have to. I read that the "only wear item" in these valves is the cap, so I'm confused why I'm having so many issues!
Thanks in advance for any help/tips!