Shower valve issue

[AliGage]

I can see it now.

this type of valve does not have much adjustment for depth. I have fitted quite a few. Forget about it having to be behind the plasterboard. Just make sure its right for the tiles. This WILL mean moving the mixer forwards.

Or use a backer board instead of 12.5 pb.
Marmox thinnest is 4mm. That gives 8.5mm back.

 

[beanz]

The cylinder section of the valve. The plate once pushed back in the picture shows 15-20mm still exposed.

7mm tile must be a small-ish format. Ceramic, maybe porcelain.
Looks like its a purpose made stud to house the BIV. So being a small area. . . . . . 6mm backer board, 7mm tile and a compressed bed of approx 3mm. I think theyll get it in.

What I'm seeing is about 5mm plus reflection. And I believe the 5mm visible, is actually the plate (where the rubber seal sits), and not the actual cylinder. I could be wrong though.. A smaller backer board might help, but surely you'd have to add lots of support to the wall? Easier to get the plumber back, to do his job properly IMO.

 

[Chalker]

These mixers are predominately used on the continent, and chased into a solid wall. The plaster or cement finish for tiling only just covers the mixer. For the price these are a good quality valve ( solid brass ) you just need to consider the depth when installing. I normally install them to be flush with the plasterboard or whatever substrate is being used. When the boarding has been fitted ( will need notching round the bottom pipe connections) then tape up the mixer to stop marks and using powder adhesive, cover the connections ready for tiling.
I'm sure I have some pics of this, so will post them if I can find.

 

[Saltire69]

That's what I was meaning Chalker. For me plasterboard is always cut round these types of fittings. Lost count of how many times had to tell plumbers to move them forward.

 

[Sean SML Tiling]

Add some extra noggins and fit 10mm insulation board amd with tile and adhesive it will work out just fine.

 

[AliGage]

Add some extra noggins and fit 10mm insulation board amd with tile and adhesive it will work out just fine.

12.5-10=??

 

[Sean SML Tiling]

Didnt read most of the posts lol so now feel a little silly haha. Cheers ali

 

[AliGage]

Lol