March pump questions

[wlockwood]

Thank you, and good point. The pump will be full from the cooling the boil recirc. around the imers. chiller, I am wanting to pump out the post boil stuff and at some point the fluid level will be below the pump. I'm trying to figure out where to build a little shelf for the pump to sit on, so any other pointers would be well received.

[meisel]

Thank you, and good point. The pump will be full from the cooling the boil recirc. around the imers. chiller, I am wanting to pump out the post boil stuff and at some point the fluid level will be below the pump. I'm trying to figure out where to build a little shelf for the pump to sit on, so any other pointers would be well received.

Ah, I see. I think you'll be fine since gravity will feed the pump to begin with. As the vessel empties it should keep prime and suck that last bit out of the kettle. I mount my pump in a portable box so I can move it around during the brewday. If and when I build a stand I'll probably permanently mount it as low on the stand as possible.

[klickcue]

Can a March pump be mounted a couple of feet above where it is drawing if the pump is primed?
And will a closed valve on the output side hold the prime when moving a hose on the output side?

thank you

Yes, the pump has enough Net Positive Suction to lift 2 feet, but you will need a foot valve on the suction line. Then, the problem that meisel alluded to, is having a priming port. The pump will not move air or very little anyway.

It is much easier to let gravity fill the suction line of the pump and then lift the liquid.

A valve on the discharge would be the best way to control flow if desired. A valve on a liquid line inlet could cause cavitation at the pump impeller but would be very unlikely unless pumping hot liquids like we do.