Brand New Boiler Circ. Pump w High Pitch Sound

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Molo

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What does this mean that I am hearing a very high pitch sound from a brand new circ pump? It is a Bell and Gosset 3 stage pump and it does whir on all 3 stages.

Thanks for any replies!
 

Jadnashua

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Did you run it dry at all? The bearings don't like to run dry...
 

Molo

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It was not run dry and has actually stopped. It lasted for about 4-5 hours after it's initial start-up. Bell and Gosset NFR-25 (or is it NRF, but you get the idea)

Thanks for the replies!
 
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