Sink Waste Disposal Install

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Ellesse

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Hi everyone,

Need help w a waste disposal install in an RV camper. Double sink. ABS DWV pipe (I think). Have selected this Moen model due to space constraints.

Problem faced: the height of the waste discharge outlet is roughly the same height as the top of the slip joint of the p-trap.
It’s in an RV, so not sure we have to meet any code, but would like it to work, and work well - without clogging the drain pipes.

Looking for help on where (and with what fitting) we should feed the discharge from the waste disposal into the drain system. I think the pipe should be connected before, rather than after, the p-trap, but I am flummoxed. as to how, in the circumstances.

Many thanks in advance.

Pics attached The pipe that was attached to the sink that now has the waste disposal attached has been swivelled to the side (the p-trap is difficult to see in the middle photo.

In the middle pic, the green arrow marked as "Waste" is supposed to show the black ABS pipe heading into the wall. It does not refer to the white contained, which holds the potable water supply. Realized after labelling and uploading it that the way I labelled it could cause some confusion.

The photo on the right show the waste disposal discharge with the 90 degree elbow discharge pipe as yet not tied in to the drain system. The drain in the background shows there is not really sufficient space available to drop the who p-trap and arm, as the hole through which the drain exits is pretty much fixed, and not moveable.
 

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Reach4

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Your discharge tube from the disposal is plenty high, if I interpret the photos correctly. I expect 1/2 inch elevation difference is more than enough. I don't know where you would draw the line, but I think you are not near the line.
I would restrict use of the disposal to when you are at a campsite with a sewer hookup, and even then put stuff into the trash/garbage where practical.
 

Ellesse

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Appreciate the input. and advice, GReynolds929 an Reach 4.
The drain is hooked to an RV site waste line, but otherwise, yes, would likely not be using it otherwise. As is, use would be minimal anyways. Agreed, given the size of holding tanks, would not want to load them up with organic waste.
Got the install done. and have had no issues since installing
Thank you both for your help.
 

Jeff H Young

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Actually makes no differance if you use disposal in a campground with hook up or in the field waste goes into a tank either way. the system works better when the valves are closed allowing tank to fill up at least some and when you open it will rush out . some people leave the grey water valve open while hooked up a bad choice for a disposal unless the tank is removed or bypassed
 
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