Roger for Model Number GSD550G01BB What controls the piston nut? Is there a solenoid in the vakve body?
Answer Roger, The "piston and nut" assembly is a "spring loaded" mechanical device, it has no solenoids or "electrical" connections. The piston inside the valve body WD22X10025 operates, based on the pressure produced by the wash or drain pump. You didn't mention an issue, but if your having a dishwasher drain issue, the piston and nut is the most common issue, after you check for a restriction in the drain hose or plumbing. Also, the piston assembly must seat and seal to operate properly. Read More... Answered by AppliancePartsPros.com | Thursday, October 4, 2012