Looking for bright ideas.
I've been asked to make a custom dish drainer, with a drain plumbed to the waste under the sink.
There is only one route the drain could take and is tight to say the least. There is about 25mm gap between the window reveal and where the kitchen worktop will be (yet to be plasterboarded) that in can be permanently attached into and fed down to go under the the sink, much like an overflow, but at the end will need to do a 90 deg turn and then have some type of female fitting preferably with a push-fit seal that ends flush with the plasterboard once fitted, with a hole through plasterboard, so that the drainer can be installed but also removed when needed. I can't use copper as it needs a bit of flex to be pushed down into the void.
Obviously zero water pressure and the amount of water going down it is going to be a cupful or so at most, I just can't think of any fitting that I might be able to get off the shelf that is a tight 90 deg, no bigger than 22mm and has a nice push fit seal.