Hi where can I find a regulator switch to put on my vacuum pump ,so when its up to the required pressure it switches off automaticly and switches on when required . 

My Vac pump is a small laboratory unit (oil filled)  It is built to run continously for as long as needed, and uses only around 100W  so I just leave it on until the stack has cured.

It has a return valve to prevent the oil being sucked back out of the pump.  (Seems a simple precaution, but not standard on the EC pump??)
 

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