need advice/suggestions. I've made 2 overflow , both are identical.
one works, while the other doesn't at first water flowed thru both of them.
but then the other one stopped working after a few minutes?
I've tried sucking on the pipe. and noticed that when i suck the check valve on top there seems to be air that got in?
what could be the problem? can i use silicone sealant to reseal the connections of the pipes and elbows?
the other one is working. but when i turned off the powerhead and flow totally stops. it doesn;'t start again by its own
i have to suck on the check valve.