I need to run concealed pipes from beneath the floor to wall-bracket
compression elbows for a wall mounted shower mixer, but can't decide the
best way to do it.
I'll need to cut a duct in the blockwork, is it best to mortar-in the
pipes or to use exterior ply over the duct (there'll be tiles over the
top)?
Is it best to use copper or barrier pipe? I'd be worried about the
mortar attacking the copper but presumably the plastic barrier pipe
doesn't need protecting(?)
Are there any problems using regular compression fittings on barrier pipe?
--
Dave S
(The return email address is a dummy)

Dave wrote:
I need to run concealed pipes from beneath the floor to wall-bracket
compression elbows for a wall mounted shower mixer, but can't decide the
best way to do it.
I'll need to cut a duct in the blockwork, is it best to mortar-in the
pipes or to use exterior ply over the duct (there'll be tiles over the
top)?

Me, I'd be tempted to go with the exterior ply option.
(I'd also keep aside the requisite number of tiles to replace ones if
access is needed to the pipe)

Is it best to use copper or barrier pipe? I'd be worried about the
mortar attacking the copper but presumably the plastic barrier pipe
doesn't need protecting(?)

Mortar will attack the copper - sooner or later.

Are there any problems using regular compression fittings on barrier pipe?

I'm pretty sure you need special fittings.

And a sharp hacksaw, or a dull axe to cut it with. (use a proper cutter, or
ensure that the edges are precisely square and burr-free.)

"Dave" wrote in message
...
I need to run concealed pipes from beneath the floor to wall-bracket
compression elbows for a wall mounted shower mixer, but can't decide the
best way to do it.
I'll need to cut a duct in the blockwork, is it best to mortar-in the
pipes or to use exterior ply over the duct (there'll be tiles over the
top)?

Either option ok

Is it best to use copper or barrier pipe? I'd be worried about the mortar
attacking the copper but presumably the plastic barrier pipe doesn't need
protecting(?)

Again both ok

Are there any problems using regular compression fittings on barrier pipe?

Provided that you use pipe inserts no problem

--
Dave S
(The return email address is a dummy)

"Dave" wrote in message
...
I need to run concealed pipes from beneath the floor to wall-bracket
compression elbows for a wall mounted shower mixer, but can't decide the
best way to do it.
I'll need to cut a duct in the blockwork, is it best to mortar-in the
pipes or to use exterior ply over the duct (there'll be tiles over the
top)?
Is it best to use copper or barrier pipe? I'd be worried about the mortar
attacking the copper but presumably the plastic barrier pipe doesn't need
protecting(?)
Are there any problems using regular compression fittings on barrier pipe?
--
Dave S
(The return email address is a dummy)

I would not use compression fittings as you won't be able to inspect and
retighten if necessary.

I would fix them using pipe clips in the base of a cut out in the brickwork
and cover with ply preferably, but I have had no trouble with ones that have
been plastered in, mortar might be different though.

mrcheerful