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    One boiler overrun, two pumps

    Here are some photos. It's a constrained space but I hope you can see what's going on. 220231 is quite good. The red pump is for the central heating, the blue for HW. You can see the flow for the central heating splitting into the two radiator circuits. In 215639 you can see at the top of the...
  2. G

    One boiler overrun, two pumps

    Thanks for replies. I've attached a picture of the plumbing system in case this helps. I don't think it's a thermal store - there are a lot of radiators so I think the previous owner decided to have two pumps, one exclusively for the CH. It's a Grundfos UPS2, BTW.
  3. G

    One boiler overrun, two pumps

    I have a heating system with a BG300+ boiler and a pump/valve for the CH circuit and a pump/valve for the HW circuit. I noticed that both pumps come on whichever circuit is active. When I looked both pumps are connected to the single overrun signal coming from the boiler. The problems are: the...
  4. G

    Reluctant DIY plumber

    Reluctant DIY plumber
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