01-19-2008, 03:39 PM
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Head pressure loss is mostly a concern on the return side. It is not that much of a problem on the supply side as it will also have the effects of gravity. 90 degree turns on the pump side will create added back pressure which will, essentially, diminish the total water flow. This, addded to the gravity effect and lift, may be of conccern when using 90 degree el's. It looks to me that you have gone to 45 degree turns instead on the pump side, which is a good thing.