I'm currently getting all the plumbing in place to install a new bathroom which will have a concealed 3 way bath/shower mixer valve. This morning i have channelled out the hole to fit the concealed shower valve, however, the valve required a 110mm recess and the blockwork is only 130mm.

 

I chain drilled the outline to the correct depth but inevitably when chiselling i found myself into the cavity (the top middle part was the top corner of a block that fell off! otherwise it would have been a fairly neat cut). My question is basically... does this matter or should i fill the void? the wall will be tiled and the shower valve controls mount around a steel plate as per the outline in the pic.

 

Also, the fittings for the pipework are very deep in the walls, would the best solution be to put a 90degree fitting coming back out and then a second 90degree fitting to run just inside the wall?

 

Any advice welcomed :D

 

looking at you picture is that a vetical valve it look the wrong way round? i use 1/2" bent male irons in the valve to connect the pipe to

looking at you picture is that a vetical valve it look the wrong way round? i use 1/2" bent male irons in the valve to connect the pipe to

 

LOL... no its not a vertical valve! my main concern is prevention of damp problems because of the breached cavity... i think expanding fomis the way to go

yeah i would, just tape the spindles up as this need to be able to be removed to replace parts

My question is basically... does this matter or should i fill the void? the wall will be tiled and the shower valve controls mount around a steel plate as per the outline in the pic.

 

Also, the fittings for the pipework are very deep in the walls, would the best solution be to put a 90degree fitting coming back out and then a second 90degree fitting to run just inside the wall?

 

Any advice welcomed :D

 

 

Joel, what pipe are running to the shower mixer 15 or 22mm? as either way you will have to chisel up or down to get a feed to it. if you are picking up the feed from the existing pipes, these too will need have gaps filled.Plus if you are tiling over, you will need to fill the gaps, or the tiles wont have anything to stick to.

Pm me your number and i will offer advice where i can

stu