XPost: uk.d-i-y   
   From: diverse@tcp.co.uk   
      
   On 03/02/2025 19:31, GB wrote:   
   > On 03/02/2025 19:01, N_Cook wrote:   
   >> On 03/02/2025 17:45, Liz Tuddenham wrote:   
   >>> N_Cook  wrote:   
   >>>   
   >>>> Only made a preliminary check o this 1KW pump and float switch in a   
   >>>> sump, prior to dismantling ad exploring further.   
   >>>> Sump full of water but no pump action. Moving the float about made no   
   >>>> differece. Tapping the pump casing made the pump work until the float   
   >>>> switch dropped to the cut off point.   
   >>>> Refilling the sump and again no pump action until tapping the casing   
   >>>> and   
   >>>> again stopping properly. I cannot see what in the way of sticky motor   
   >>>> brush or loose/corroded contact inside the motor housing could produce   
   >>>> this symptom.   
   >>>   
   >>> You haven't said what sort of motor it is, but if it is a commutator   
   >>> motor with brushgear, the fault could be worn-down brushes to the point   
   >>> where one of them is almost-but-not-quite touching the commutator.   
   >>> Tapping the motor gives some sort of contact and then the vibration of   
   >>> the motor allows it to touch the commutator often enough to keep it   
   >>> running.  This will give a fireworks display around the commutator and   
   >>> will do considerable damage if it continues.   
   >>>   
   >>> If it is not a brush motor, a similar thing can happen if the terminals   
   >>> have become loose.  The sudden shock torque as the motor starts is   
   >>> enough to make contact and vibration will keep it running; then the   
   >>> contact is lost again after the motor has stopped.   
   >>>   
   >>> The first things you need to check are what type of motor it is and   
   >>> whether the supply is reaching the terminals in the connection box on   
   >>> the motor casing.   
   >>>   
   >>   
   >> The pump is a JTFS Mini Micro domestic sewage pumping station,   
   >> probably JTFS190NN   
   >> No type technical details found but no obvious external  starter cap   
   >> outside the motor casing or casig bulge.   
   >> The other consideration is it was installed 10 years ago, tested   
   >> working then, but never heard to be working since.   
   >> It should have worked in a flood situation last year but it did not   
   >> (automatically of its own accord that is) , no maintainece or testing   
   >> or inspection in those 10 years by the owner or anyone else.   
   >   
   > My BIL has a sump pump for his basement. It deals with any water   
   > penetrating, as well as the stuff from the toilet in the basement. It   
   > needed replacement, but that only cost around £70-80. Having seen that   
   > your one costs around £800, I can see why you are so interested in   
   > repairing it!   
   >   
   >   
      
   We've looked into replacement rather than repair, seeing similar solids   
   /dirty water capable combined pump and float switch. ToolStation and   
   Machine Mart 70-120 squid but are trying to unravel submersible from   
   submergible meanings as the counter staff don't know and such info not   
   on/in the boxes.   
   What was the failure process of your one?   
      
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   Global sea level rise to 2100 from curve-fitted existing altimetry data   
      
      
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