Waste Master and plumbing Mod

[Dutch Star Don]

Originally Posted by DeeGee

Thank you! I'm intrigued by the idea of electric valves, now that someone mentioned them. With the new plumbing and power valves, DW can dump. That's a win in my book.

Anyway, I can find a 3" power valve on Amazon, but not a 1.5" for the gray tank. Anyone have a source?

EDIT: Spoke too soon.

This is a set of valves, 3" and 1.5". Seems suspiciously cheap - half the price of the single Valterra 3" valve.

I used Drainmaster and bought their double switch wiring harness. The second switch is in the half bath. I dump my tanks from inside the coach.

[Bigadventur]

Originally Posted by sramer

I did the same thing about a year ago but I have a macerator so I did it all in 1.5".

I hard plumbed in clear pipe and added auto drain valves to add to my height of laziness and not have to get out of the coach to dump while I'm parked. LOL

I also plumbed in a flush system for both the black and the gray tank.

What you have done is created a cross connection between your potable water and your waste tanks. You need a vacuum breaker or double check valve between them. The waste could backup into your water tanks. I see valves but theses are not fail safe.

[sramer]

No, if you look at the Pic again, there are 2 vacuum brakes one on the spigot itself going into the Y valve and then one that goes into the black tank.

On top of that, behind the spigot I installed a one-way check valve. Then underneath the panel is a shut-off valve for the coach feed. I turn it off first to to isolate the coach plumbing.

[sramer]

Originally Posted by Bigadventur

What you have done is created a cross connection between your potable water and your waste tanks. You need a vacuum breaker or double check valve between them. The waste could backup into your water tanks. I see valves but theses are not fail safe.

No, if you look at the Pic again, there are 2 vacuum brakes one on the spigot itself going into the Y valve and then one that goes into the black tank.

On top of that, behind the spigot I installed a one-way check valve. Then underneath the panel is a shut-off valve for the coach feed. I turn it off first to to isolate the coach plumbing.