Holding Tank Valves?

That's exactly why I changed mine to electric-I think 2 of my cables were shot-put a choke cable or something like it to operate my black tank valve. I was pushed over the edge one night when the shower pan started filling just after I turned the water on-of course it was 40 and pouring out. I don't mind leaving the shower grey open but always have closed it the day before dumping the black to have the water to flush with-and the kitchen grey I think it just makes sense to keep closed considering pushing our food waste and such. Anyhow-I highly recommend electric valves...

Larry-make sure you specify you want inside controls-typically that involves an extra set of switches, additional wiring, and may limit your options when it comes to choosing the valves you want.