Circulator pump getting loud

The circulator pump for our boiler (hot water radiator system) has gotten a lot louder lately. It’s loud enough to wake me up when the heat clicks on in the morning. The rest of the day isn’t too bad. I just oiled it and it didn’t improve. Is it definitely on its way out, or is there some way to repair it?

xchx

in Plumbers and Plumbing 11 years and 10 months ago

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xchx | 11 years and 10 months ago

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Thanks for the tip. You were right – that coupler was broken and changing it out solved the problem for now at least. In case anybody finds this in the archives later, there are great instructions on Youtube: http://www.youtube.com/watch?v=-3R3b5OiNUI

Master Plvmber | 11 years and 10 months ago

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A noisy B&G 100 is often fixed with this $13 piece of crap, too: http://www.pexsupply.com/Bell-Gossett-118705-Coupler-Cast-Iron-Series-100-HV-PR-2 …but that pump is a dinosaur. It’s a better long term plan to replace it with a modern, maintenance-free unit.

eman134 | 11 years and 10 months ago

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if it is the 1/12 hp model, you can get it rebuilt, but that is barely worth it since a new pump runs around $300, while a new bearing assembly is $80 http://www.pexsupply.com/Bell-Gossett-118844LF-Bearing-Assembly-Lead-Free-Series-100?gclid=CMz7vbqVl7wCFaxxOgodVGQAsA http://www.amazon.com/Bell-Gossett-Circulating-Series-100/dp/B002SIXS1A

xchx | 11 years and 10 months ago

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It’s a Bell & Gossett Series 100 (KV)

Master Plvmber | 11 years and 10 months ago

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Depends on the type. What’s the brand and model number?