What size siphon break hole on 1.5" return

[Gp!]

Anyone remember what size siphon break hole it took for your 1.5" return? I started with 1/8" hole and I've incrementally stepped up to 3/16" but still no luck so sanity checking =)

 

[Saltyreef]

Anyone remember what size siphon break hole it took for your 1.5" return? I started with 1/8" hole and I've incrementally stepped up to 3/16" but still no luck so sanity checking =)

I never trusted those holes....
Instead i used a wide tipped fan nozzle and stuck one end up towards the waters surface. Broke the back siphon immediately and gave a nice little surface tension break.
https://www.bulkreefsupply.com/loc-line-flare-nozzle.html

 

[Gp!]

I never trusted those holes....
Instead i used a wide tipped fan nozzle and stuck one end up towards the waters surface. Broke the back siphon immediately and gave a nice little surface tension break.
https://www.bulkreefsupply.com/loc-line-flare-nozzle.html

Would have preferred that route but there isn't space with the return plumbing and didn't use loc line. So siphon break hole this go around =)

 

[Saltyreef]

Would have preferred that route but there isn't space with the return plumbing and didn't use loc line. So siphon break hole this go around =)

Good luck!

Im sure youll find the sweet spot gradually.

Are you drilling above the water line or just below?

 

[Gp!]

Good luck!

Im sure youll find the sweet spot gradually.

Are you drilling above the water line or just below?

I drained the tank down so that the top of the elbow is exposed - so I am drilling above the water line at the moment. It is below the water line when filled

 

[Saltyreef]

I drained the tank down so that the top of the elbow is exposed - so I am drilling above the water line at the moment. It is below the water line when filled

Nice. Let us know what hole size ends up doing the trick!

I always kept my sump pretty full so i never had much room for drainback. Needed that instant siphon break at the surface vs slightly below.

 

[exnisstech]

Hmm 1/8" has always worked for me. I just make sure it is on the back or bottom so water isn't spraying up when the pump is running :zany-face:

 

[Gp!]

Hmm 1/8" has always worked for me. I just make sure it is on the back or bottom so water isn't spraying up when the pump is running :zany-face:

Just to clarify... 1/8" is working on your 1-1/2" return?

 

[exnisstech]

Just to clarify... 1/8" is working on your 1-1/2" return?

I apologize mine is a 1 inch return but works perfect when I turn the pump off to feed etc.