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Circ. Pump Replacement Question

Stovepipe Member Posts: 5
I am replacing a leaking B&G Little Red Booster with a Taco 007-F5 that I have on hand. The specs look reasonably similar.

1) I noticed in another circ. pump post it was recommended to use a full-face gasket. The supply house says they carry only the Taco gasket, and I see that it does fit into that little groove. Is this likely to be a concern?

2) When I took the B&G off, the bolts seemed like they were barely even hand tight. (No sign the old gaskets were leaking.) But how hard should I tighten the bolts? That Taco gasket sticks up quite a bit above the face. Am I supposed to tighten it until that is flattened down?


  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 3,931
    edited January 2021
    The Taco gaskets should be all that you need. You want them a tad more than snug, but don't wail on them. If they leak when you pressurize, tighten them until the leak stops.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
    EBEBRATT-Ed Member Posts: 15,299
    I agree with @Alan (California Radiant) Forbes
    snug + a little don't over tighten
    HVACNUT Member Posts: 5,736
    I know guys who will only use the full size gaskets, they say the Taco gaskets leak. I say they don't know how to tighten a flange. I've personally never had a problem with the Taco gaskets.
    To add to the above, tighten the bottom flange first, and make sure the piping stays plumb as you tighten the top. Snug each side a little at a time. 
    Make sure the existing flanges are clean and smooth. 

  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,646
    I've only had those red full face gaskets leak. They turn hard as concrete in a few years and dry out and leak. Never had any of the square cur OEM Gaskets leak 
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!