The trailer came with a
Mr. Heater BOSS (battery operated shower system), model XCW20 which was top of the line. However, and I was warned by the PO that it had some freeze damage. He had taken a quick look inside and saw a hole in the main heating manifold. But when disassembled, it was revealed that the visible hole was only part of the problem. Talking with their tech support on the phone, it was not repairable. Well, that was dissapointing. So I started looking at lesser models on line. I had an idea to get
the middle model (XW18) and see what I could salvage off the XCW20 to use on it. That's just what I did and it turns out, quite a few things could be used to improve the XW18.
> The shower head with an on/off switch. So now I have a spare shower head.
> The intake/pump is the same so I have a spare pump.
> The XCW20 comes with a carrying bag, which I can still use.
> The propane regulator is the same so I have a spare.
> The AC charger is the same so I have a spare.
> A 12v cable comes with the XCW20, but not with the XW18 since there is no jack to plug it into. Mine is now modified to use the 12v cable.
> Misc parts can be used if needed....screws, handle, faucet, & some electronics.
In testing it out in my back yard, I've learning some things that are good to know ahead of time - instead of pulling it out of the box when I'm camped and trying to figure it out.
> Don't install the propane regulator with the connection pointing up - the burner will not light - even with an extension hose from a 11 lb tank.
> The heater will only raise the water temp 40*F, so if using cold water from a creek or other source, use a 5 gallon can and run the output from the shower head back into the 5 gallon can (recycle) at least once, to heat up the water. When the "Overtemp light" lights up, you have 5 gallons of water to shower with and that's plenty for a camp shower.
> If water stops, burner shuts off.
> On the XW18 if the burner shuts off for ANY reason, the main power switch needs to be recycled to restart the burner. I was hoping that using the shower head from the XCW20, that when shutting water off to soap up and then turning water back on to rinse off, that the burner would relight to keep heating the water. It worked that way on the XCW20, but not on the XW18. If I want to relight burner while in the shower, I'll have to reach outside shower stall and recycle main power switch. Not a big problem, but a little inconvenient. One reason why the XCW20 is top of the line.
My 23 Zero shower stall (not deployed) and 5 gallon shower can. I can set the heater & propane bottle on the fender. Hoses will reach with no problem.
You can see in this pic from my testing that I'm running the water back into the 5 gallon can.
![IMG_1367a.JPG IMG_1367a.JPG](https://expeditionportal.com/forum/data/attachments/482/482890-ad4e4095f5f81d4ef5eb0cf77fa56f1a.jpg)