Pipework for bath taps and separate thermostatic shower over

[Hannah82w]

We've had plumbers in to install first fix pipework in our self-build followed by what they called a "mid fix" of plastic to copper pipework to come out of the walls ready for us to close up. In the main bathroom we are having a bath with taps and shower over with separate thermostatic controls (i.e. not a bath shower mixer).

 

The pipework for the bath has the main hot and cold feed pipes going to copper and then a separate C shape of copper pipework going back into the wall and then out again where the shower controls will be.

 

We're wondering why the main feeds couldn't have just had a T off to the bath taps and then continue on up to the shower? Can we adapt it to this? Is an isolating valve on the pipework to the shower required?

 

The feeds come from a manifold with separate isolating valves in the utility room, the cold comes from a balanced feed (if that's the right terminology) and the hot from the hot water cylinder which is ASHP heated.

 

Photos to help illustrate!

Edited May 16 by Hannah82w

[BotusBuild]

@Hannah82w - do you have pictures of the controls that you propose to use for the bath and shower? They may help people to answer more fully.

 

Where on the pipework fitted in the bathroom as shown at the moment would the shower controls and shower head be fitted?

[Hannah82w]

So on this picture, the green circle is around the pipes where the shower controls will be fitted, the blue circle is around the main feeds (plastic to copper) and the bottom of the shower feeds going back into the wall.

[Hannah82w]

This is the thermostatic ERD shower and example of the bath mixer taps we plan to fit.

[BotusBuild]

With those picture I would say a simple T piece would suffice instead of the double set of pipe where the bath taps are going