diy overflow
- Thread starter eh1421
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misterthews;688118; said:does anyone know the flow rates of pvc pipe. I have a 135g tank and was thinking about using 1" pvc. Anyone know the gph flow rate i would get?
Thx
What counts is the flowrate. With a 1" pipe I would guess that it takes up to 400-450 gallons/hour.
OK, i tried my hand at making one of these overflows using the one inch pipe, and i get terrible flow. I tried various methods of sucking the air out of the first bend in the pipe, but i still get a very low flow. Does anyone have a picture of water flowing of various different sizes of pipe? Should i just make another one out of 1.5 inch pipe or what??? I was hoping that i wouldnt have to.
akr1219;692937; said:OK, i tried my hand at making one of these overflows using the one inch pipe, and i get terrible flow. I tried various methods of sucking the air out of the first bend in the pipe, but i still get a very low flow. Does anyone have a picture of water flowing of various different sizes of pipe? Should i just make another one out of 1.5 inch pipe or what??? I was hoping that i wouldnt have to.
Can you post a pic of your overflow?
Possibly if you tell me how ( just a new guy here). But it looks just like the one in this link, the only difference being the pipe size. http://www.aquariacentral.com/forums/showthread.php?t=83507
The flaw with that design is it creates zero syphon. That is why you are getting low flow. Flow rate is maximized when the tee is as far from the surface as possible. The closer the tee is to the surface, the less syphon you will have. Since that design requires the tee to be at the surface, there is no way it can operate efficiently. It is a bad design.
