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Discuss Correct transformer for 12V waste water Pump. in the DIY Electrical Forum area at ElectrciansForums.co.uk.

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  1. duffielddan
    Offline

    duffielddan EF Member

    Location:
    Germany
    I recently bought a 12V Whale Gulper 220 waste water pump to remove water from a shower on the groundfloor of my house in Germany (no way to gravity empty the bath/shower.)
    I am after advice on if I have the correct 240V AC to 12V DC transformer.
    The pump is a diapragm pump and the instructions state the following:
    Voltage 12 V
    Recomended fuse size: 5Amp automotive (supplied and fitted)
    Dry running Current: 2.4A
    Current draw: 3.5A

    The transformer I fitted is described as the following
    Waterproof LED supply
    Model 12V60W IP67
    Input AC 100-240V, 47-63Hz, AC 1.67-0.56A

    Output DC 12V +/- 5%, DC 5A, 60W.

    The pump works but only runs at 2 L/min when it should run at 10+ L/min. I am fairly confident the pipework is not an issue. (no blockages, pipes big enough etc)

    Before I go back to the manufacturers and complain could someone tell me if my transformer is likely to be correct or if I am missing something.

    Many thanks for any help,

    Duffielddan
     
  2. Pete999
    Online

    Pete999 Trusted Advisor

    Location:
    Northampton
    Business Name:
    None
    I would hazard a guess that you have an incorrectly sized transformer, does the information on the actual pump not tell you what power supply is needed?
     
  3. westward10
    Online

    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

    Location:
    Northamptonshire
    Try it with a car battery see what happens.
     
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  4. buzzlightyear
    Offline

    buzzlightyear Electrician's Arms

    Location:
    star command
    if all fails use a bucket.
     
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  5. westward10
    Online

    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

    Location:
    Northamptonshire
    Have you measured the open circuit of the transformer, if it is 12v with no load it maybe suffering volt drop. If it functions correctly on a car battery this is probably the case.
     
  6. static zap
    Offline

    static zap Regular EF Member

    Location:
    west midlands
    Are the wires between the transformer and pump , long and getting warm ?

    (Do you know others using same pump - or could Statistics be optimistic .)
    (also check pump is 12V model )
     
    Last edited: Jul 31, 2017
  7. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    Out of interest, why didn't you buy the transformer from the same vendor as the pump? Surely this is the ideal approach...................
     
  8. static zap
    Offline

    static zap Regular EF Member

    Location:
    west midlands
    Found some instructions saying some models , to lift water over 1m obstruction , syphon action so may be wrong for you application .
     
  9. westward10
    Online

    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

    Location:
    Northamptonshire
    These are generally marine pumps which do operate from batteries.
     
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  10. Richard Burns
    Offline

    Richard Burns Trusted Advisor

    Location:
    Cambridgeshire
    Business Name:
    Richard Burns
    From your description the power supply you have should operate the pump successfully.
    If the pump has a damaged diaphragm or seals then the flow rate can be very low.
    If you are trying to pump over 1m in height then the pump will be slow or stop.
    If the pump is trying to lift the water to the inlet then it will not work effectively.
    Because the power supply is not cutting out, which is what I would expect if it were overloaded, I would suspect that there is a problem with the pump or out flow route.
     
  11. davesparks
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    davesparks Trusted Advisor

    Location:
    guildford
    How long and what size is the cable from the transformer to the pump?
     
  12. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    Ok, why didn't the op buy a battery from the same supplier......
     
  13. westward10
    Online

    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

    Location:
    Northamptonshire
    I am assuming he has it in a house.
     
    • Like Like x 1
  14. duffielddan
    Offline

    duffielddan EF Member

    Location:
    Germany
    Thanks Pete999,
    The pump is mostly used in a marine application although can also be used for household bathrooms where no gravity fed waste pipe is available. Very little information therefore on supply requirements
     
  15. duffielddan
    Offline

    duffielddan EF Member

    Location:
    Germany
    Thanks westward10. I will give it a go this evening.
     
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