Fridge/Freezer Compressor

Thanks Joseph, the vertical outlet / draining back when not running was exactly the sort of thing I was imagining. Hadn't thought of the sponge, though, great idea.

Rob

To control the pressure and act as an unloader a proper compressor switch at about £25 will do the job. It can be set to the tank pressure you want and left to do it's job. As a vacuum pump jest vent to air. I like the idea of a sponge as a means of oil separator. Noel.

Do an ebay search on "Air Compressor Pressure Switch Control Valve Manifold Regulator Gauges 240V" if you have an account.
The prices start at £13 or best offer.
I've bought a couple recently for small compressors coupled to 10l receivers.
They seem to work fine.
There's several different sellers, so have a look for the one which includes the most additional couplings.

Bill

SOD Dave & Robert G8RPI , thank you both so much for your valued suggestions and directives .

Your input gave me the confidence , regardless of my previously stated fear of anything concerning electrical circuits, to connect up , and hey presto , we have a working compressor.

All that now remains is to plumb it into my present system , so that the pressure switch kicks in for charging the pressure tank , and then switches off both compressors when the desired pressure is reached .

Again , many thanks to you both and also to the other contributors who offered suggestions and advice .

David .