Anyone who wants to convert their off-roader will, at some point, get into the subject of tanks too. Whether to increase range with an additional diesel tank, or when it comes to water and waste water. If conventional tanks don’t fit for you, you can also have a tank made from plastic. Under some circumstances that’s even cheaper than buying a ready-made tank. Anyone who wants a custom tank for their build has come to the right place at DL Kunststofftechnik, for example.
The tanks from DL Kunststofftechnik are made of high-density polyethylene. They are food-safe, odour-tight and acid-resistant. That’s why Daniel Leyh and his team make tanks for all kinds of use: water tanks, diesel tanks, grey-water tanks, AdBlue tanks and so on. DL Kunststofftechnik has been producing tanks for almost 20 years, mainly for motorhomes and boats, and for some time now for off-road vehicles too.
Custom tanks for motorhome and van builds
All tanks are made individually to the customer’s wishes, with the tank’s individual parts welded together using hot-gas extrusion. Almost anything is possible. “But the drawing of the tank should, if possible, fit on a beer mat,” Daniel Leyh smiles. The 36-year-old engineer took over the company from his father at the start of the year. “Oh, and of course the tank also has to fit through the relevant doors or hatches in the vehicle; you should keep that in mind when planning.”

Otherwise there are no limits to the builder’s imagination. That includes the form in which you want to send DL Kunststofftechnik the information about your custom tank. You can build a model from wood, cardboard or polystyrene, or simply send a sketch. Of course, depending on the tank, baffle plates are also fitted inside the tank, and tabs for fastening can be welded directly to the tank in the right place.
Plastic tanks have the edge over stainless-steel tanks
Compared with tanks made of stainless steel or steel, the plastic tanks have the advantage of being corrosion-resistant and considerably lighter. The tanks can be made of either black or white polyethylene, with the black tanks being completely UV-resistant.
Anyone who wants to have their own tank made should also make sure to allow space for ventilation, outlet and filler when converting the off-roader. If you’re unsure how to approach the custom-tank project or what the tank should look like, you can also drop by DL Kunststofftechnik in person. There you’ll get expert advice and the vehicle can be measured on site.
>>> You’ll find more information on custom tanks for your build at DL Kunststofftechnik.
Here you can read how to approach the conversion of your off-roader:
Die richtige Planung für den Innenausbau des Offroad-Wohnmobils


