Best way to route pipes for shower tray

[lostdiyer]

I’ve removed my bathtub and currently have the hot and cold water pipes coming out of the floor. I’m planning to install a shower tray and a thermostatic shower. However, I’m unsure what to do with the exposed pipes.

Should I cut into the floor and move the pipes behind the wall, or would it be better to build the shower tray on a frame and route the pipes behind the wall above the floor?

 

[Madrab]

Remove the Tee's and connect with straight couplers, redirect under the floor and then up into the frame's cavity.

 

[lostdiyer]

Remove the Tee's and connect with straight couplers, redirect under the floor and then up into the frame's cavity.

Thanks! I assume wooden batten joists would be sufficient to secure the chipboard after cutting it?

 

[Madrab]

If there's nothing under that section of P5 Board then it can be strengthened with a piece of baton underneath if the tray edge is to sit on it, ideally as a noggin in between the joists. If the tray is sitting on P5 and the edges of the tray will be in between the joist then add extra support noggins underneath to stop the P5 from deflecting where the tray edges will sit.

I would also tank the space - any water onto P5 will cause all sorts of nasty issues.