Wide adapter for Rothenberger Ropump drain cleaner

The Ropump works by pushing and pulling a big plunger to unclog drains, pipes, sinks and toilets.
The standard adapters are not wide enough to seal against the sinks I usually come across. (Funny story: I tried to unclog a shower basin, pushing very hard on the plunger. The customer was standing next to me, watching what I was doing. Suddenly the seal was lost and I sprayed the customer soaking wet with dirty shower water… Oops 😜)
I designed a wider adapter with a thin flexible lip inside to help sealing: it works very well for me!

Printing
Printed in TPU with 0.6mm nozzle and 0.3mm layer height. 
It is a large print and it failed halfway through (lost bed adhesion). 
Instead of reprinting I printed the upper part and welded both parts together with a hot plate (mirror welding).
To test the fit I'd recommend printing only a section of the upper part first, and adjust scaling accordingly.