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  #21  
Old 04-25-2015, 04:01 PM
coolhandgoose coolhandgoose is offline
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Need some plumbing advice.

My return is drilled through the overflow box about two inches below the water surface. To prevent siphoning my tank back into the sump I'll drill a hole in the return line in the overflow box just below the surface. I get that, but the one thing that confuses me as I'm filling the tank is should I make sure the return inside the display tank go below the level of the return hole? Otherwise as I'm filling it all the water is just going to go into the sump regardless of siphon break. Everywhere is out of loc line so I have to do it temporarily with pvc and elbows.
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  #22  
Old 04-25-2015, 09:15 PM
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Proteus Proteus is offline
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Why not put a check valve in
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  #23  
Old 04-25-2015, 09:31 PM
coolhandgoose coolhandgoose is offline
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Quote:
Originally Posted by Proteus View Post
Why not put a check valve in
I probably will do that as well. But I don't want to rely on that just in case you never know.
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  #24  
Old 04-25-2015, 09:38 PM
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Here's what I mean, if you left it like this with no check valve all the water up to that level will be drained. I'm thinking the line should be curved down to below that level (kinda like a durso) that way the siphon break will prevent water from draining below that level?
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  #25  
Old 04-25-2015, 09:43 PM
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It will still drain down to the lower part the pipe regardless if you put a elbow on or not it just won't siphon
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  #26  
Old 04-25-2015, 09:52 PM
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Something like this?
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  #27  
Old 04-25-2015, 11:07 PM
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mine return is similar, just have room in the sump for backflow
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  #28  
Old 04-25-2015, 11:21 PM
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Really want to avoid the back flow to the sump if possible.
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  #29  
Old 04-25-2015, 11:27 PM
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What if I angle up on the return and create a siphon break on the pipe on the display tank side?
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  #30  
Old 04-26-2015, 12:32 AM
reefwars reefwars is offline
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Put 2 x 45 fittings
on the return bulkhead , first one aimed up the second aimed out , this wouldn't be permanent but something to use until the loc line is available , don't glue the 45 just dry fit. This will give you the raise you need
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Last edited by reefwars; 04-26-2015 at 12:35 AM.
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