new march pump noise

[docmoran]

any comments on this one - bought new march pump from big name supply company and when plug it in makes incredibly painful high pithced noise and then will occassionally quiet down to its normal hum sound with fan etc.. any suggestions?? can these pumps ever run dry??

 

[The Pol]

DOH, it uses fluid to lubricate... dont run it dry!

It is SCREAMING for fluid to lubricate the impeller

 

[ScubaSteve]

You should really search on this forum about this pump. There's a lot to it that I won't mention here. It doesn't work like a normal pump, and requires special handling. Once you figure it out, it's pretty easy to use.

 

[Stile]

So these are best installed below their source??

I do know that you never restrict the suction side... IE. install the ball valve on the discharge side.

 

[The Pol]

Stile, cmon...

Not BEST installed below the source, they ONLY work below the source.

 

[Stile]

Ya... i'm pulling brain farts. My bad

 

[The Pol]

I thought yuo were joking!

 

[Stile]

I've just see several posts in the past about people installing these above the source...... Of course in hind sight, these people were probably asking about why their pumps wern't working...........

On a side note, i'm going 1/2 inch on all my tubing and fittings. Of course as pretty as SS is, i'm going brass. Pump is still in the box.... and to think i was going to just plug it in to hear the pretty noise.

 

[The Pol]

1/2" is good... good idea, I should have thought of it first!

Yeah, the pump is not self priming, and needs liquid for lube...