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Grundfos 3 phase pump for my snowmelt system??

So I recently poured a sidewalk from the street to my new basement apartment with 2 240’ loops of 3/4” pex. A couple weeks ago I acquired a Grundfos 3 phase pump that I have been trying to figure out if it’s worth it to try and make work for my snowmelt system. Is it even possible/worth it where I only have single phase? Is it overkill for my system? I will put a link to the pump I found that has all the specs.  Any help would be much appreciated. Thanks!



  • Ironman
    Ironman Member Posts: 7,334
    Even if you could get 3 phase, that’s way too much pump.
    Sell it here or on eBay.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Jamie Hall
    Jamie Hall Member Posts: 22,874
    One phase to three phase converters do exist. They aren't cheap. To put it mildly. You can probably buy two or three decent standard pumps suitable for what you want for the cost of an inverter.

    Sell the three phase, or they make good paperweights...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • 109A_5
    109A_5 Member Posts: 1,334
    edited December 2023
    Hello @asmedley,
    If the building does not already have 3 phase power it is probably not worth it. And it is probably too much pump anyways.
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • hot_rod
    hot_rod Member Posts: 21,790
    You need 4-5 gpm max. Get a better sized pump
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream