Water hammer from my check valve

[ZachAttack]

yeah, that sounds like it would work. if you drill a hole right below the waterline (the lowest point of water that can be drained without overflowing the sump) the hole will let in air cutting the siphon...

[Skimmerking]

Originally Posted by KrazyKuch

Here is the type of Check Valve I use this


I have it mounted horizontally and it works perfect........I needed one cause Having anti syphon holes on a dart with a single outlet would spray water all over the place and when I placed them lower in the water then my sump would overflow so I had to go with a check valve.

hey man you can always use a piece of foam to allow the air to get in and still have the water get defused alot.

Originally Posted by ZachAttack

yeah, that sounds like it would work. if you drill a hole right below the waterline (the lowest point of water that can be drained without overflowing the sump) the hole will let in air cutting the siphon...

exactly and try to dril a hole on a angle if you can. and drill it on the back of the pipe so if it does spray it will hit the tank and not go out front.......

[ReefJunkie]

Well after replacing the sump glass I decided to go with in sump return and I installed the check valve horizontally, it only hammers a couple times then stops.

[ScubaSteve]

Ah, there ya go! Not perfect but better that nothin'!