[Brandon]

My plan is to use black HDPE plastic sheets (48" x 96") that are 1/4" thick and FDA compliant and food safe. The black color is used to inhibit light which in turn inhibits algae growth. I don't have the welder yet but I'm about to pull the trigger on a Weldy Energy HT1600D (https://www.amazon.com/Digitally-Controlled-Heating-Plastic-Flooring/dp/B07T8LLLY6/ref=sr_1_26_sspa?crid=20SRJT5ARV80B&keywords=weldy+digital&qid=1641957606&sprefix=weldy+digital,aps,134&sr=8-26-spons&psc=1&smid=A140HZI9P1116E&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyT1I1SUZHUElGN0gxJmVuY3J5cHRlZElkPUEwMjI4MDczMTVGUkhISUxBOVNaUiZlbmNyeXB0ZWRBZElkPUEwNDQzMTc5U0I5SjJHUjVGU1JEJndpZGdldE5hbWU9c3BfbXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==). There are cheaper welders out there but his one has digital temperature control, which is important for setting and maintaining consistent welds. I'm also going to get additional nozzles (Amazon.com) as I'll need the tacking and triangular nozzles for this project. My inspiration for this DIY project comes from Ladi and Margaret (

). I'd also recommend this pdf file for the principals of plastic welding (https://laramyplasticwelders.com/wp-content/uploads/Making-Even-Better-Plastic-Welds-book.pdf).

I've never welded plastic before, but neither had Ladi and Margaret and it appears all turned out well for them. If the inside water tanks go well, I'll also fabricate some under body waste tanks to fit exactly as needed.

Watching that video makes me think about making my own grey water tanks for the outside. If I develop a leak in one of those it is not an issue. Inside fresh water I’m not sure about. Going to have to research more.

 

[Brandon]

We custom designed the black and grey water tanks for our Sprinter. I CNC'd the parts but did have a professional do the welding. I would be willing to design your tank and CNC the parts so you can weld them up. I have access to the 3D fender geometry so could make the tank fit perfectly. Please reach out if you would like us to help with your project. We have 1/4" HDPE material on hand.

All the best,
Hein
DIYvan

Hein do you make any grey tanks for under a Transit? I will be building out an extended high roof model.

 

[Brandon]

I have a larger version of the NW Conversion tank. Super high quality but as you note LOTS of wasted space. I probably would not purchase again.
Good to try something else.

Would this fit over the wheel well of a DRW van? Or not enough space for that?