Connecting shower drain to waste pipe.

[Rollin]

I have a Wedi Fundo Plano shower tray to fit to existing solvent welded 40mm waste pipe run. Will I be able to solvent weld to the outlet pipe that is built in to the tray or do I have to use push fit/compression?

The joint will be covered with mortar as per the instructions with the tray.

The tray and outlet pipe look like this...

[B17NNS]

Depends on the material of the waste/trap.

If it's not ABS use one of these to get onto solvent weld,

http://www.screwfix.com/p/universal-compression-wa...

[Rollin]

Can you mortar over one of those?

[Gingerbread Man]

Not a Wedi man myself but depending on it's diameter and material you should be able to use a straight solvent weld coupler.

The Impy wet room trays have a ball joint type fitting to get the fall from the trap, then you glue into it your pipe. I'm assume Wedi is similar in design.

[Rollin]

The pipe is angled to the correct fall. It starts off at one diameter and then there's a step to a wider diameter towards the drain. The instructions show that in the UK the pipe should be cut at the wider part. I assume this is for 40mm solvent weld.

[Gingerbread Man]

Having a fitting in your hand would be easiest.