Gray water management is something which could be improved on the Dweller 13. I’m not sure what is customary in other geographies, but I am finding more and more areas in the US where regulations ban the dumping of gray water onto the ground. I have specifically run into this in Texas state parks and US national parks.
The D13 has a nice sized 21 gallon gray water tank. My issue with it is that there is no means for connecting a dump hose. There is a large PVC drain pipe which has a ball valve and which terminates with a PVC elbow. I brought this up with my dealer prior to purchase and was basically told - that’s the way it is.
My original plan was to install some type of hose connection onto that PVC elbow so that I could attach a drain line for times when I wanted/needed to dispose of the gray water at a dump station. Executing the plan proved to be a bit more difficult. Like all of the other plumbing in the Dweller, the gray water waste pipe is metric sized. It is plumbed in 40mm PVC.
Luckily, it is pretty to solve. The outlet from the gray water tank uses a rubber union joint to connect to the 40mm PVC. It was pretty simple to remove the factory drain pipe assembly and replace it with 1-1/4 inch PVC which has an OD of 42mm. The 1-1/4 inch PVC pipe easily slipped into the rubber union.
Apologies for the poor picture, but this shows what my gray water drain plumbing now looks like.
- 1-1/4 inch PVC pipe attached to existing 40mm rubber union fitting
- 1-1/4 inch PVC ball valve - I will probably replace this with a "true union" ball valve in the future.
- More 1-1/4 inch PVC pipe
- 1-1/4 inch PVC elbow (socket by thread)
- 1-1/4 inch to 1-1/2 inch adapter (male x male)
- My drain hose is currently a 1-1/2 inch swimming pool vacuum hose to which I added threaded “fire hose” fittings. I tried a flat discharge hose that would roll up very small, but it was an absolute failure...it would easily kink and would not drain well under gravity flow.
To Do:
- I still need to figure out an elbow fitting for easily attaching the hose at an RV dump station. Suggestions welcome.
- For version 2 I might use 1-1/4 inch swimming pool vacuum hose with camlock fittings. I think the camlock fittings would make it easier to attach the drain hose and the bill of materials would be simpler. 1-1/4 inch hose should still drain the tank at a reasonable rate.