makes senseAs Ray said, pressure is what commonly kills a plunger if they are Teflon. Depending on the make of your solenoids you may want to look at them and replace the plungers if they are NOT Teflon from the start.. Also when you open your bottle or 1/4 turn valves you want to open them slowwwwwly at first so you don't hammer the plunger with pressure at this point either.. Thanks, SJ