WTB Checkvalve
 

anyone have one of these or know where i can buy one?

would be nice to get one with hose barbs on it (maybe 3/4 inch) so i can just attach hoses and clamp it.



let me know!

I'd be hesitant designing a system that would rely on a check valve but do believe AI in the west end has them.

what alternatives are there to prevent a back siphon from my sump underneath my main tank.

A siphon break hole drilled at the high point of the return (at an angle so the water doesn't spray into the room, or piece of air line directed downwards) or just have the return line a little below the water line and volume in the sump to handle the back flow.

Think worst case, what would happen if the check valve didn't fully seat.