A waterlock in two parts for the special purpose of fitting into an upwards-pointing sewer pipe and with two connections for the hoses from a washing machine and a tumble dryer.
An outer diameter of 73 mm was found perfect for the standard 3-inch PE pipe fitting which has an integral rubber seal. The pipe fitting was moulded in concrete.
The two parts are screwed together with M68 x 10 threads made from the ThreadProfile workbench in FreeCad. I modified the minor diameter of both the external and internal threads to get a looser fit, and I also used the 45 degree variant (as opposed to the standard 60 degree V thread) to make the 3D printing easier.
The sketches which make the base for the revolution and pad parts are not constrained and can be manually changed to fit your needs and pipe dimensions. I included the CAD file here for you guys to play with.
| WaterLock.FCStd | 2.9MB | |
| WaterLock_Bottom.stl | 2.6MB | |
| WaterLock_TopInlet.stl | 9.8MB |
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