oldjohnt Posted July 18, 2016 Report Share Posted July 18, 2016 Of course, I generally prefer the fresh water demand pump at or below the level of the tanks outlet so gravity feeds the pumps suction inlet and it don't have to lift any whatsoever. HOWEVER I'm installing an auxiliary fresh tank with no more then 3 feet of 1/2" inlet suction hose BUT THE PUMP WOULD BE ABOUT 6 INCHES HIGHER then the auxiliary tanks outlet, so the pump would have to lift about 6 inches max when the water level is near the bottom portion. QUESTIONS: Are those typical fresh water demand pumps (Mines a Shur Flo 35116 or something like that) capable of lifting maybe 6 inches???? Even if so, its not going to loose prime each time and have to pump back up each use???? Would an inline check valve on the suction side be required or of any use??? I guess once I hook it up (if mounted in current location) it will be easy to find out the answer lol. There's just no place to mount it so its higher then the pump grrrrrrrrrrrrrrrrr John T Plumbing just aint my cup o tea Link to comment Share on other sites More sharing options...
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