Camper van water filler cap for garden hose adapter(s)

thingiverse

Inspiration (threaded hose coupling) taken from: https://www.thingiverse.com/thing:5153808 These are made to fit my Weinsberg 600 DQ (2019) camper van. Seem to fit well, but I haven't actually filled any water yet was weather is awful and I'm not going on any trips for now. First version was made to take a couple of couplings, one on the outside to attach hose and the second on the inside to reach a bit into the filling pipe of the van (optional) to reduce spill when flowrate is low. I figured the weak spots in some of the filler cap designs that exist seem to be the grips to hold on to it while rotating it in/out of place. I made away with those grips and made the overflow holes large enough to be useable as grips for my normal-male-sized hands. V2 is a design that suits me given that I had a bunch surplus different size Gardena-adapters and I wanted a design where no 3D printed parts were in contact with the freshwater flow. The V2 has a center hole with a G1" thread into which a G3/4" adapter can be screwed. This can then accept another adapter with outside threads to reach into the filler pipe a bit (see pictures). It fits my adapters exactly (Gardena brand), you may want to adjust the thickness or other parameters depending on how tight the fit is if other brands/models are used. Openscad files are included if you wish to modify the design(s). Dependencies to the following great openscad libraries: https://github.com/Irev-Dev/Round-Anything https://github.com/adrianschlatter/threadlib