Wall mounted shower outlet - trimming back

[Conor]

Hi. Double checking some things before the tiler arrives tomorrow.

 

We have a wall mounted shower outlet, with remote valve. I've set the depth of the female tee to be 15mm out from the wall, 12mm tile with 3mm adhesive.

 

The outlet fitting itself is much, much deeper than the female boss. Is it ok to get the grinder out and trim it back to about 12 mm long from the current 25mm then install?

 

I can't see any other option as even if I were to get a deeper female fitting, I'd have to trim it back anyway (the tee is quite deep, so I've a male equal straight, then the 1" female straight.

 

In hindsight I probably should have used a deeper female straight and had it deeper in the wall.

 

Edited May 1, 2023 by Conor

[Jenki]

I've cut a lot of the these down in the past, does it seal on a fibre washer of PTFE/ pipe seal? If the former, I've found once cut use a piece of 180 grit wet and dry on a flat surface to get a good sealing surface.

[Conor]

It's PTFE. Though there is a backing plate and fibre waster in the box, but no mention of how/why it's to be used.

 

This is pretty much the entirety of the instructions that I could find.

 

[Jenki]

Cut it back, I tend to use a liquid thread seal, don't trust the PTFE, as you can not see the joint, ideally the female boss will be flush or just below the tile.👍