i recentley installed drain master electric waste valves.
www.drainmaster.com i changed the grey water from 1 1/2 in. to 3 in. it makes for a real neat install. i wish i would have installed these yrs ago they work great. next step will be to install aux. switches inside for those rainy days. working with this company was a great experience. tech support from doug was as good as it gets.
jim