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Stainless steel pumps

Simply Rad
Simply Rad Member Posts: 192
in THE MAIN WALL
hello everyone.
I have been thinking about water quality lately and our closed loop radiant systems. We have SS boilers, Pex tubing, copper pipe and brass components. The odd components out are the cast iron pumps and the steel expansion tank. I have been using pre-manufactured zone manifolds and even with the non flow through flow meters the scale clouds up and after time hard to read. I have been using Fernox fluid products also. Looking at a CI pump after being in service you see the affects of water. Would the use of SS pumps make a significant difference to the system fluid quality, enough of a difference to justify the cost difference?
Thanks

Jeffrey
Jeffrey Campbell

Comments

  • hot_rod
    hot_rod Member Posts: 23,379
    On non barrier systems using all non ferrous components eliminates corrosion, same reason we use them on DHW recirc

    The O2 ingress is the problem.

    If you have a lot of scaling minerals in fill water, which you do, those need to be removed to eliminate scale build up inside boilers, etc
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Derheatmeister
    Derheatmeister Member Posts: 1,581
    Jeffrey.
    I understand your dilemma...Different Materials used in modern hydronic heating systems have different "Happy Places" as for the PH and other influences they are subjected to...Every system is different depending a bunch of factors. Just as with Politics it's hard to make everybody happy. 😊 ... I try to find a balance for all of the materials involved in the install.
    You may consider Testing your system Fluid and Make up water for PH, TDS, Salinity,Total hardness,EC,Copper,Iron to get a better understanding of what it is that you are up against...Just keep in mind that you should test the PH within 15 Minutes as it MAY change as soon as the sample is extracted from the system We test all of the above on site to avoid this possible error.
    Greetings, Richard.

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