Drain/plumbing Sizes GPH

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anzaw

Member
Joined
Apr 27, 2005
Messages
5
I am refurbing a 150 gallon 48''x24''x30'' which I bought for an excellent price off ebay. I need some advice with setup.
1.) Currently it has a single inside overflow drain set up as a wet/dry filter with bio balls and a 1.5'' bulkhead 6'' from the bottom. I am thinking about taking out the bioballs and building a stockman standpipe. Question is with one 1.5'' bulkhead am I going to have enough turnover? How many gph does one usually drain? I understand that by converting to a standpipe design I take away noise but I also decrease draining gph due to the loss of water weight. Any ideas how fast a 1.5" would drain as a standpipe verses under the weight of appox. 12-16 inches of water.

2.) I am currently building a sump/refugium. I have most of the design figured out except the return plumbing. If I plan on using an appropriate external pump, should the drain in my return section be 1.5'' or 1''.

Hope my questions make sense.
Adam
 
Welcome to RF Adam! I'm not sure how much 1.5 is good for, but I posted the specs on the CPR overflows that tell you how much each overflow is good for with different size bulkheads. Probably not the best thing to go on, but atleast it will give you an idea to build upon until someone else chimes in. I wish you the best and hope you enjoy it here:)

Model Flow Rate Outflow Size Width
CS50 300 GPH 3/4" Bulkhead 6 1/2"
CS90 600 GPH 1" Bulkhead 8"
CS100 800 GPH 1" Bulkhead 10"
CS102 1400 GPH 2-1" Bulkheads 10"
CS150 1600 GPH 1 1/2 " Bulkhead 10"
 

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