GRUNFOS SUPERBRUTE 26-99 3 SPEED

jimde Posted By jimde, Feb 15, 2010 at 5:29 PM

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  1. jimde

    jimde
    New Member

    May 27, 2009
    71
    0
    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.
     
  2. webie

    webie
    Minister of Fire

    Feb 21, 2009
    651
    8
    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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