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Flow switches

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Jack
Jack Member Posts: 1,047
What is out there in the flow switch world that does not have a lot of pressure drop. I've only used the McDonnel Miller paddle type before and hope to find something a bit more...refined. Oh, refined and inexpensive;)

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  • Jeff Elston
    Jeff Elston Member Posts: 289
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    I am Not sure I've ever seen a pressure drop reading on a flow switch with a paddle.

    Taco makes a flow switch with a paddle but as far as I remember they are pretty much the same device different colors and nuances to its construction is all.
  • hot_rod
    hot_rod Member Posts: 22,131
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    what type of flow rate are you needing? Is this for closed loop hydronic, or DHW application?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Jack
    Jack Member Posts: 1,047
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    DHW. .5 gpm & up
  • Snowmelt
    Snowmelt Member Posts: 1,415
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    Is for a tankless water heater application
  • hot_rod
    hot_rod Member Posts: 22,131
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    Harwil built a .5 gpm for me to try, works fine right down to a small lab flow. Labeled as a Q12N C2

    http://www.harwil.com/products/flow-switches/q-12n
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Jack
    Jack Member Posts: 1,047
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    HR...You are the man! Thanks! I think for my purposes I will use the 112 model. It has the controller mounted. The Harwil folks were very responsive and helpful.