Stop back siphon reliably With Ball type Foot Valve??

[Aethro]

Hello reef central! QQ

I'm currently building a Sump/fuge setup that will have a separate tank and pump for return fed by gravity though a bulkhead, Mainly for the extra water volume and the ability to house more than double the amount of water should the power go out and any siphon happen.

I was going to do just the drill Mod , But then I stumbled across this nifty device... http://pentairaes.com/foot-valves.html. Has anyone had any experience with these? I know the spring ones probably wouldnt work with normal hobby pumps but this ball type one?

 

[Sk8r]

Don't use any sort of check valve or valve with parts that are supposed to move independently of your intervention---you can turn a gate that will move, with force; but a valve that's gotten gunky might decide not to work when it most needs to, without human intervention. Meaning---they clog.

Either keep a hose from a pump sitting in water A from touching the surface of water B, or put a hole in the line, aka a 'siphon break.' Those work reliably. Valves are not so trustworthy.