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central heating pump and air in radiators

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  • Registered Users Posts: 3,481 ✭✭✭John.G


    monitoring both pump powers may show somethng but wouldn't hold my breath as these f rated pumps read practically the same power whether the pump is dead headed (discharge valve closed) or pumping flat out but may show something for comparison purposes.

    Here is a link to my pump, you may pick one up cheaper somewhere locally ofr on Amazon but don't buy a used one.

    https://www.screwfix.ie/p/wilo-yonos-pico-25-1-6-130-glandless-circulating-pump-230v/6153x



  • Registered Users Posts: 11,764 ✭✭✭✭Andy From Sligo


    looks a nice fancy pump that, the Rolls Royce of pumps! - not too bad a price I have seen some pumps priced more



  • Registered Users Posts: 11,764 ✭✭✭✭Andy From Sligo


    I put my old pump back on today , its noisy sure (worn bearings noise) but I am interested to see if the radiators still sound like they have a lot of air in them . Whilst I had both pumps off I took a pic of the holes where the pipes are on .

    The pump from where I got from Amazon looked like a bigger bore hole than the diameter hole from the old pump. I am wondering if this could have been introducing more air into the system/radiators?





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