Cable operated dump valves

I had Auto Drain electric valves and they worked great. They attached right to my existing valves with no plumbing required. My valves were standard and not cable operated though.

Lube the stainless shaft by the handle also.

A little mineral oil and a little water and operate the valve a few times and it is lubed for awhile. Works for me. :)

I had an electric valve once, a Drainmaster. It worked very good until it had water against it, then it would not open. I replaced it once, same problem. Replaced it with a manual one and problem solved. Try some drain valve lubricant in the tank.

Several years ago I install electric valves. They worked fine for regular dumping. But my first dump into a portable blue tank was not good. The electric valves I had closed rather slow compared to hand operated. Before the valve got closed my blue tank was over full, what a mess. Maybe the electric valves today are faster operating.