When your pump turns on and the air in the line is pushed out, does a little bit of water also come out of this valve? I'm facing a bit of a challenge right now where mine spits out some water and I was not prepared for that and it's a bit of a problem.
Easy fix done it now works a charm
Go on zon type air check valve. Its an aquariums inline 4mm valve like the non return. I got 10 for 4 quid.
Find the highest point of ur pipe. Stab a tiny hole and push in the check valve so that air blows in.
When pump is on preassure closrs said valve as it wont push out. (pushing}
When preassure stops ie pump stops thr current is then unpreassureised syphon (sucking now)
So instead least resistance as its easyer path in that air valve than to pull up the tanks height.
So air lets in and it stopps
I plug pump in and unplug is u hear a tssss as it releases instantly
Uniclife 6 PCS Aquarium Check Valves One Way Non-Return Air Pump Accessories for Fish Tank Black
