Quote Originally Posted by johnsattuk View Post
Not really a heat sink, just a packer. underneath is an SSR to control the air valve, the square with a red blob is a 12v lamp-flasher which gives me the pulses, next to it is a 12v reg. (with a couple of ceramic capacitors ) needed because I am supplying 24 volts from my main panel. The AUTO mode is an M7 relay in the panel.

www.wmcpumps.com as on the back of the pump. I chose a 3mm tube but if I replace it will use a 1.5 mill
Thanks John I got the Jist of what would be needed to make this work from pic and the Reg I recognised but it was the Blackbox with what looked like a Thermister above it that thru me off.! . . . . . Now I look again can see it's part of the black box.!