Sizing shower pump

Discussion in 'Plumbing and Central Heating' started by Mike2007, 24 Jan 2022.

  1. Mike2007

    Mike2007

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    Vented copper cylinder
    50 gallon of cold water storage
    2m head from storage to cylinder
    3 bar booster pump
    Surrey flange
    Should I increase connecting pipe to 28mm feed?
     
  2. motorbiking

    motorbiking

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    Where will the pump be located and how far will that be from the bathroom? If this is for 1 bathroom 3bar is probably OTT.
     
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  4. Mike2007

    Mike2007

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    Two bathrooms
    Pump is on floor next cylinder
     
  5. oldbuffer

    oldbuffer

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    1. A Stuart Turner Monsoon 3 bar can pump a maximum of 60 litres per minute. Even with a 300 litre hot water cylinder that could empty the cylinder and cistern in less than 9 minutes, not allowing for mains replenishment.
    2. Best to look at the flow rates of your showers. Sum them, then use a shower pump which can supply the maximum flow of both simultaneously.
    3. 22 mm should be fine for 60 lpm assuming the pipe length (not head) is about 4 metres. There are online calculators you can use. They need to know velocity. Recommended velocity figures are 3.0 metres / sec for cold and 2.5 for hot.
     
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