[anijet]

I wanted to leave the original valves installed ahead of the electric valves so I could use them as shut-offs in case the electric needed repair. It worked for the gray but not for the black. For the black I just replaced the original valve because there wasn't a good place to install the new valve. The new gray valve was installed down stream of the original valve. I just removed the original gray remote control and installed an extension that I can use to close the original gray valve from under the belly of the trailer. If you decide to go this route and want to install dual switches, let me know and I will tell you about the factory miss wired switches that took me half a day to figure out what they did.