Fitting of shower elbow

[SL]

I'm installing a Grohe built-in valve, and have a L shaped shower elbow with male thread, but i'm not sure what type if fitting I need in the wall. I was thinking of using a female coupling with a push fit, so when I screw the two together and should the elbow not point downwards, I can twist it.

Also is it ok to connect a flexible tap connector directly to a levered ball valve.

Thanks

 

[Fluffster]

You should use a wall plate elbow with a female connection. Screw this to some plywood and connect a copper or plastic pipe from your showervalve then tile over.
Pete

 

[TicklyT]

I'm with Fluffster, use a wallplate elbow. If the shower head ends up pointing the wrong way, adjust the amount of PTFE tape on the threads.

If the ball valve is designed to accept a compression olive, the chances are the flat area at the end of the connection will be a bit narrow for the washer in a tap connector to seal against. It may cut into the washer instead of compressing it, which will then start leaking.

 

[ganey]

is there a straight version of the back plate elbow. Some things I have read say to avoid elbows where you can with power shower plumbing as this messes with the flow causing cavitation. A backplate elbow straight into the shower outlet elbow seems to be a problem here but there is a need to secure the shower elbow at the wall

Thanks