John guest to 15mm arrest valve

[camerart]

Hi,
I have a John guest water pipe 15mm running in the ceiling, and it needs to come down the wall to the washing machine.
It's difficult to visualise the angles and minimum space here but if I can fit e,g, an arrest fitting: See image.

to the plastic pipe, I could then use copper for the angle and down pipe.
The reason is the metal fitting is smaller that the John Guest plastic one, and will fit in the gap.
I've done it before but this will be plastered in, so I'm checking.
C

 

[Madrab]

An arrest fitting, sorry but that's not a familiar term. Your picture is of an isolation valve.

You wouldn't want to plaster over that fitting.

 

[Elkato531]

Never a good idea to conceal compression fittings and certainly not iso valves which have a habit of leaking. If you must have the fitting concealed, use a straight pushfit connector from plastic to copper and have the iso valve where you can get to it.

 

[camerart]

An arrest fitting, sorry but that's not a familiar term. Your picture is of an isolation valve.

You wouldn't want to plaster over that fitting.

Hi M,
Ok, isolation valve.
Is there a similar small diameter fitting that you would plaster over?
C

 

[camerart]

Never a good idea to conceal compression fittings and certainly not iso valves which have a habit of leaking. If you must have the fitting concealed, use a straight pushfit connector from plastic to copper and have the iso valve where you can get to it.

Hi E,
Ok, thanks.
This makes it a much bigger job. I'll go into the ceiling and fit a John Guest straight fitting to copper then weave my way to down the wall.
Cheers, C