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Recommended circulator pump

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Bry_2
Bry_2 Member Posts: 14
in Radiant Heating
I am installing a used Weil Mclain boiler to run a new hydronic system but it has no circulator pump on it. What type of pump would be best for a 1 storey, small bungalow running 8 rads off a 3 zone system? Thanks.

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  • Zman
    Zman Member Posts: 7,569
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    A little more info would help. Is this a cast iron boiler?
    What size and how long are the piping runs?
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Big Ed_4
    Big Ed_4 Member Posts: 2,785
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    Radiators normally are piped on an diverter type system or home run ..8x3 assume an diverter . Which would be low head higher volume .. With three zones and one pump ? I would favor a variable circulator , I would also use on an home run ..
    I have enough experience to know , that I dont know it all
  • rocky_mtn
    rocky_mtn Member Posts: 13
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    Wilo stratos, taco 007e, or grundfos alpha would be my suggestions.
  • newagedawn
    newagedawn Member Posts: 586
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    i like the grundfoss alpha there alittle expensive but work well with raidiant
    "The bitter taste of a poor install lasts far longer than the JOY of the lowest price"
  • Gordy
    Gordy Member Posts: 9,546
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    The only clue is there is no clue.......
    Rich_49delta T
  • Bry_2
    Bry_2 Member Posts: 14
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    Sorry, I was away for a week. I should have specified. 95K btu cast iron boiler previously on a gravity fed system fed with black pipe. Conversion to pex al pex feed lines off a 3 zone manifold but I need a circulator pump to feed the zones. Will be using zone valve meters to control flow to each zone. Thanks.

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