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Grundig circulation pump solar heater

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AnnieP
AnnieP Member Posts: 1
in Solar
I am trying to run a diy pool solar heater using a Grundig central heating pump to circulate the water but it is not moving the water just a slow trickle. Can anyone tell me what I am doing wrong? Thanks 

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  • Jamie Hall
    Jamie Hall Member Posts: 23,289
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    Need a LOT more information. How much head -- friction loss -- are you trying to pump against? What are the specifications for the pump (model number or pump curve)?
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    Ironman
  • hot_rod
    hot_rod Member Posts: 22,143
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    is it pumping against the pool pump?

    Typically a 3 way valve gets installed at the pool pump and it circulates the collectors and the filter

    A pic may help see what you have 
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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