Quote:
Originally posted by WAJ_UK
I would have thought that the res would cause the same restriction no matter where it is in the circuit, is this incorrect?
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In terms of resistance then yes. But the ideal way to plumb a res is by connect it via larger ID hose to the pump inlet. That way you ensure that the pump inlet is not restricted and that NPSHA>NPSHR. Compare a pump inlet with a 1/2" hose length (and so more like 3/8"ID fittings) toa pump inlet connected to a res via a small 3/4" hose run. Pump performance may well improve in second scenario.