Finally the solenoid arrived that I am using for the air tank drain. It is a 12v, 1/4" NPT threads, normally closed solenoid.
I fitted the switch and wiring all ready so all I had to do was fit the solenoid. I removed the manual drain from the tank and fitted a elbow 1/4 x 1/4 push to connect air fitting in the drain tank hole. I made a bracket to mount the solenoid to the floor of the van and then connected it to the air tank with some 1/4" tube.
Now to drain the water out the tank all I have to do is flick a switch.
12v solenoid with PTC fittings screwed and elbow for tank.
Small mounting bracket
Fitted to floor of van
Tank drain switch
I fitted the switch and wiring all ready so all I had to do was fit the solenoid. I removed the manual drain from the tank and fitted a elbow 1/4 x 1/4 push to connect air fitting in the drain tank hole. I made a bracket to mount the solenoid to the floor of the van and then connected it to the air tank with some 1/4" tube.
Now to drain the water out the tank all I have to do is flick a switch.
12v solenoid with PTC fittings screwed and elbow for tank.
Small mounting bracket
Fitted to floor of van
Tank drain switch