I seem to be having a common problem with one of my two overflows. One is silent, no problems, the other is quite noisey - your basic flushing sound and I can see the level of water go down below the level of the
Durso standpipe opening, then back up, back down, flush, flush...
I'm fairly certain the problem is a distance / flow issue. The side that works is short, almost straight down into the sump. The problem side has a fairly long horizontal run to get to the sump. Unfortunately I can't move the sump to shorten the one side.
My initial thoughts are to restrict the flow into that one overflow (keep it from getting below the standpipe opening) or maybe to open up the airflow into it. But I'm not sure either will work...
Any suggestions?
thanks!
Chris