Gray water switch

[George Frudakis]

My gray switch does not respond every time I press to open or close the valve. Where can I get a new switch, or is ti the valve that is the problem,?

[David T. Richelderfer]

My experience was the drain valve reached end-of-life, not that the switch was failing:

http://beaveramb.org/forum/index.php/topic,6459.msg47059.html#msg47059

[Frank Bergamo]

George, I have found that when dumping Gray/Black valves, it is best to activate valve while still plugged in to shore power or engine running. The reason for this is that the voltage will be higher, 13.5-14.0 volts instead of 12.5-12.7. The higher voltage seems to make valve open and close much more "lively". I have had a "slow" Black valve on my Marquis now for a few years, and by activating valve with higher voltage it opens and closes with no problems. I know that I will have to replace this valve eventually, but by following this procedure, it has prolonged the life of the valve. Hope this helps.

[George Frudakis]

Thanks all
I going to leave the engine running and then open the valve, hope this works. The black switch work ok without the engine running. That leads me to not the voltage but will try. If not it changes the valve time.