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Old 05-05-2010, 05:07 PM   #41
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ok question time
how do i calculate the gph on my over flow.

im basically going to be running 2 of these.they will be 1 inch pvp each. and i know i dont need 2 but its back up just incase one loses siphon.
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but im not sure how to calculate the gph of each one
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Old 05-05-2010, 05:09 PM   #42
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p.s. my salt and my refractometer will be here tomorrow. first batch of rocks should be cured/leeched out real soon. so i need to order a ro/di unit soon
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Old 05-05-2010, 05:37 PM   #43
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ok is this correct? from what i can find. 1 inch pvp is roughly 600gph. so 2 of them will handle 1200 gph. i think what i want to do thou is find a return pump that does between 600-700 gph and i should be ok. this way if one ever breaks siphon im still safe.
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Old 05-05-2010, 08:59 PM   #44
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I don't really know, but I just thought I'd bump this for you.
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Old 05-05-2010, 10:37 PM   #45
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I really think you should go with a min. of 1200 gph because of head loss incured with bends and turns of your pvc and head loss due to elevation of tank above the pump.
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Old 05-06-2010, 05:59 PM   #46
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Quote:
Originally Posted by thincat View Post
I really think you should go with a min. of 1200 gph because of head loss incured with bends and turns of your pvc and head loss due to elevation of tank above the pump.
are you talking 1200 drain or 1200 return? i will have 1200-1400 gph draining. i was looking for between 600 and 700 gph return after head loss. tehn add in ph for the rest of water movement.

i was under the impression that i needed roughly 20x water turn over for circulation. if im doing 600gph on the return and 2x 800 gph on ph's i should be ok? or is the 15x-20x water movement generally just for the sump calculations?
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Old 05-06-2010, 06:23 PM   #47
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You will have head loss and also on every bend in your plumbing. If your pump is to small you have to "buy" a bigger pump, if you have to much flow you can always throttle down by returning some of the water back to your sump.
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Old 05-06-2010, 06:31 PM   #48
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so your saying between head loss, and plumbing twist and turns im likely to need around 1200 gph to get it to 600? i think thats what your saying. i thought you were saying before that i should aim for 1200 gph coming out at the end.
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Old 05-06-2010, 07:33 PM   #49
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nothing exciting but progress is progress





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Old 05-06-2010, 07:37 PM   #50
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a build in progress is exciting to me
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