Better drain for RV folding sink

Sometimes it's the little things that are persistently annoying. In our camper van, we have a foldable washbasin that folds down and then back up after use. Wiping the basin out briefly before folding it up is fine by us. Unfortunately, the drain is designed in such a way that some water always remains, and then, annoyingly, it flows out through the basin when the washbasin is in its upper position if you don't also push in the stopper every time. Okay, not a big deal, but it always bothered us. My design circumvents this problem with a modified structure of the bowl and the hose connection. The part is one-to-one compatible with the drain strainer, seals, and screw of the 33mm drain from the company REICH. As an additional component, only a closed M6x18 sleeve nut made of brass or stainless steel is required – these are available in well-stocked hardware stores. Important: Ideal materials would probably be ABS or ASA, as these only soften at quite high temperatures (~90°C). For PETG, this is the case at ~75°C. Since our Truma only reaches about 65°C anyway, I printed it in PETG-CF. However, PLA is completely unsuitable in any case! The print parameters that ensure mechanical stability and watertightness are important. I used a layer height of 0.16mm, 6 walls, 25% infill, and a very slight over-extrusion (~1.05). Supports are only needed in one spot for the hose connection and only from the print bed. If you want to be absolutely sure, you can treat the print with DICHTOL. I did not do this with our specimen, printed with the above-mentioned parameters from PETG-CF, and it is perfectly sealed even without this treatment. Depending on the individual fit, the sleeve nut must be carefully pressed in or sealed with a suitable adhesive.