[bikestuff]

I tried to find an alternative to the Spartan solenoid valve. Newell stocks them at close to $100. I did not get as far as reverse engineering the system...but what it needs to do is pretty simple. When the pressure drops and the system turns the pumps on, the solenoid needs to close. When the pump turns off, the solenoid needs to open thus relieving the pressure on the pump head.

Next time mine goes out, I will find a cheap replacement.

Bill