Ball Check Valves????

[Scythanith]

Originally Posted by BlueTang<3

I went with this valve mounted on a horizontal, I never thought I should remove my returns and drill a Anti siphon in them, I added it on mine as I have 30 plus feet of plumbing and this helps even the return line draining at all.

http://www.bulkreefsupply.com/georg-...eck-valve.html

This is the same type I am running. Easy to take apart and clean, pure gravity driven, no springs, membranes etc.

[The Guy]

The best way to install a swing check is vertical, then the head of water above the valve will always drive the flapper closed when the return pump stops. I just went to new Speedwave pump and pulled my check valve apart to clean it and it was spotless inside. Anti syphon hole or a short lock line outlet at the water surface is also a great idea, redundancy is a good thing.