10-14-2011, 01:43 AM
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How to use PVC without restricting water flow?
This is the first time I'm going to use plumbing underneath a tank. I don't have any of the plumbing and haven't drilled the tank yet. I already have a Rena XP3, and a Hydor heater 5/8" is on order. The intake will be through bulkheads. The exhaust I haven't decided. The exhaust hose running outside the tank would make the insides look cleaner instead of having a return pipe running up to the surface from a bulkhead. The XP3 uses 5/8" ID hose. The problem is that PVC only comes in 1/2" or 3/4". The 1/2" PVC barb end fittings are the only size that will fit into the Rena tubing. The 3/4" is too big. But the ID of 1/2" PVC barb fitting is only 3/8", which will restrict the water flow (1/4" smaller than Rena tubing). Anyone have any ideas? Thanks!