Hi,

I have 3 toilets in my house. The toilet upstairs has a FlushMate system installed in it and it's more than 12 years old. Downstairs, I changed the flush valve and flapper about 4 months ago in the 2nd bathroom to a FluidMaster. Up to that point, all 3 toilets were working fine with no hum.About a month ago, I changed the flush valve and flapper on the 3rd toilet to a FluidMaster also because it was leaking. About 2 weeks ago, I started hearing a humming noise coming out from the 2nd bathroom, evert time I flushed any of the toilets. The hum would start as soon as the tank would start refilling and stop when the tank was full.

I read many of the postings online for troubleshooting ideas. When I turned the valve cap counterclockwise to one of the valves, I could get the humming to stop temporarily. This only worked in one bathroom though, not the other. When I stopped the water from filling the tank by raising the floater, that would stop the hum temporarily also. Opening nearby faucets didn't help. Reducing the flow of water to the tank helped but also temporarily. Temporarily means for a few flushes only.

Please advise what else I could do to solve the humming problem permanently.

Thanks,

Elie

Shut the water off and open up the top od the Fluid Master and remove the black seal. Place a pan over the top and turn the water back on for a few seconds. Reassemble and give it a flush. Hum all gone? Good luck Tom

When you say "open the top of the Fluidmaster", are you referring to the black cap? If so, I opened it but I didn't see a black seal. I only see the lever mechanism. Are you referring to the black floating cylinder that goes up and down. If so, how do you open it?

Thanks,

Elie