Tobo21

Hi, Im after some advice please! Were having an extension at the rear of a mid-terraced house, I want to run a water pipe from the old outside tap to the back of the extention to create a new one. The floor it will run across is block and beam, the builder has said that he wants the pipe under the insulation on the block and beam floor rather than in the screed so it will run under the DPC and will need to come back up through it. I can do the pipe work etc my question is around penetrating the DPC as I want to chase the pipe into the wall on the inside so the plasterboard can be laid flat to the wall. Should I run the pipe on the outside of the DPC and then into the wall or chase into the wall below the DPC and then reseal the DPC with either silicone or a cut off of DPC?? How will this affect building regulations if I break the DPC? Iv attached a pic so hopefully what im saying makes sense! If you have questions please ask! TIA :)