Best way to fix this leak (Sanishower outflow)

[RonnyBeGood]

The outflow of my Sanishower is leaking at the point shown in the photo.

If I understand it correctly, the lower part is a non-return valve and the upper (black) part is a connector (maybe needed because the pipe widths are different?).

I guess I will need to remove the whole thing and replace the sealant. If so, what would be the correct sealant to use? Or is there a better way to fix this?

Many thanks

 

[just pumps]

Well I thought I`d seen it all with sani pumps but that it right up there with the best! How to join the nrv to a soft rubber inlet connector = Use silicone!

Buy a new non-return valve online. A 21.5mm solvent weld straight connector, a small tub of solvent weld cement and a 22-32mm metal jubilee clip then you need to find a plumber willing to sell you 6" of overflow pipe and job done.

 

[RonnyBeGood]

Thank you. Really appreciate that. I will do what you said.

It did look a very odd way of connecting it, even to my untrained eye. I'm glad it gave you a laugh anyway!