We have a Columbia Emerald EM-125 oil boiler. 2 problems: water leaking from temperature control for hot water due to packing caused shortage in circ pump. Oil co. replaced circ pump with Taco brand (the green 008-F6 model). When temperature gauge under metal panel is increased to above 160 it makes a very loud mechanical humming/buzzing noise which persists intermittently before during and after the firing of the boiler. When turned down to 160 it ceases. Oil co. also replaced water packing but now we have little to no heat in our bathtub/ shower. The water in rest of house heats fine but we have tepid-to-cold showers with intermittent bursts of heat that are infrequent and short at best. Plumber visited and thought it may be our coils and we needed to replace our boil HOWEVER hot water was working fine prior to fixes provided by oil company. I'm lost, need help.

I am not 100% sure, but I think these pumps are not designed to circulate hot water over 140F. Read the paperwork that came with the pump - or even better, call the manufacturer.

Hi guys...

Milo, great guess... got me to look up the specification on the pump, but unfortumately this 008 pump has a working temperature range (40F to 230F) exactly the same as the 007 circulator so it should be just fine for a boiler application. The only real difference noted in the specs. Was the HEAD RANGE that increased from 11 feet to 16 feet with the 008.

With all that being said, I'm at a loss myself with what has been described and instead of guessing and as much as I dislike it I'm going to recommend that the oil company come back in and see what they think.

I would love to know the result, if possible, diamondjoecity... ;)

Mark

Thank you Mark for keeping the facts straight. Milo