jvision Posted February 17, 2014 Report Share Posted February 17, 2014 I recently bought a 90gal that was drilled with an overflow. It had been running w/o the overflow for several years - the previous owner just ran the tubing for their canister filter thru the drill holes. I'm plumbing it with a 33gal sump, and went to put in the bulkheads to run a Herbie overflow... turns out when it was originally set up, it must have had a 1 1/4" drain and a 1" return b/c the 2 holes drilled in the tank are different sizes! I'm obviously going to run it with 2 drains, but they're not the same size... So here's the question for you plumbing gurus, which drain should have the ball valve on it? It'd be much easier to find a 1" ball valve than an 1 1/4" one... maybe I should just find a reducing bushing, and have them both 1"...? Quote Link to comment Share on other sites More sharing options...
jcgd Posted February 18, 2014 Report Share Posted February 18, 2014 I myself would put a ball valve on the 1" for the main full syphon drain and use the 1 1/4" pipe for the back up that is plumbed straight into the sump.. It's really a perfect setup for a Herbie style overflow. My 160 gal has only 1" drains and they are more than sufficient. Quote Link to comment Share on other sites More sharing options...
Ron Posted February 18, 2014 Report Share Posted February 18, 2014 (edited) I would put the gate valve on the 1" as well. I have my 70 gallon reef with a 1" main drain and 1.5" emergency drain. Edited February 18, 2014 by Ron Quote Link to comment Share on other sites More sharing options...
jcgd Posted February 18, 2014 Report Share Posted February 18, 2014 Yeah, I should have said gate valve. A ball valve cannot be adjusted fine enough. Quote Link to comment Share on other sites More sharing options...
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