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GRUNFOS SUPERBRUTE 26-99 3 SPEED

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by jimde, Feb 15, 2010.

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  1. jimde

    jimde New Member

    Joined:
    May 27, 2009
    Messages:
    71
    Loc:
    Northeast WI
    I am placing a Grundfoss 26-99 circ for my boiler storage tank loop and was wondering if I need a cast iron or bronze circ? I was told bronze,but the cast is $150.00 cheaper.

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  2. webie

    webie Minister of Fire

    Joined:
    Feb 21, 2009
    Messages:
    652
    Loc:
    Wisconsin
    Jim I beleave you are planning a closed loop system ( pressurized ), There for a cast iron pump is all you need . If you had an open system as in some of the outside boilers or if you were useing it for circulating DHW then you would need a bronze or a stainless .
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