WTB - Return Pump

[SeaHorse_Fanatic]

Valving and slowing down a pump creates back pressure on the pump. Bad to have back pressure.

[MoreDakka]

Hmm....damn LFS always giving me bad info. They say that if you valve the pump that it will adjust it's voltage to compensate in turn using less power... I know nothing of the inner workings of a pump so I'm assuming I'm just being takin' for a ride.

[The Codfather]

Originally Posted by SeaHorse_Fanatic

Valving and slowing down a pump creates back pressure on the pump. Bad to have back pressure.

Not necessarily, reeflo pumps for example run more efficiently if valved off a little. They actually recommend it. Valving off a discharge is the equivalent of more head pressure.

[SeaHorse_Fanatic]

Originally Posted by The Codfather

Not necessarily, reeflo pumps for example run more efficiently if valved off a little. They actually recommend it. Valving off a discharge is the equivalent of more head pressure.

He's talking about Mag pumps or their equivalents. I've always been told that valving off Mags & similar pumps is a no-no. I've never done it so I have no personal experience of it causing a pump to fail. If I'm wrong, then I apologize for passing on bad info. However I was told this by several experienced reefers.

Anybody valved off Mags or similar pumps on here & if so, what has been your experience??

Anthony