Dishwasher hose repair adapter for Bosch

prusaprinters

Damaged your Bosch dishwasher corrugated drain hose? This adapter has a small end of 17.25mm outer diameter which is the ID of the corrugated drain hose on my Bosch dishwasher, and 14.85mm ID, which is 17.25 - 2x 1.2mm walls. Walls on the small end kept as thin as practical to prevent clogs as it does neck-down from the hose interior. Corrugated hose is not really made for clamping like most flexible hoses, rather intended for molded-on factory connectors. The hose does not stretch appreciably even when heated, so the basic fit is not tight. I used 90-second epoxy applied to the small end to both add strength to the part and assure gaps were filled. I am uncertain if the epoxy bonds chemically with the hose material, but the ASA filament I used should bond, and the corrugation of the hose and layer lines of the print can provide a mechanical bond with the epoxy. I used a hose clamp over the hose to secure the glued joint. The epoxy is intended to prevent pin-hole leaks and strengthen the print.I replaced the damaged section of hose using a 13ft / 4m extension hose I found on Amazon. This particular model had a 30mm ID flexible fitting on one end and a 20mm on the other. Since the 20mm end fits my air gap, I needed to use the 30mm end to splice onto the remaining original hose, which is accomplished by clamping over my adapter with a hose clamp.I used ASA filament with 100% infill. Note the model has walls 8mm thick on the large end, so I was not worried about crushing that with the hose clamp, but do take care not to use too much force on the small end with 1.2mm thick walls, only 3x0.4mm. I printed mine with it tilted at a 30 degree angle and with supports to hold it to the build plate at the angle, in order to assure the clamp would not tend to shear the print along the layer lines.