Hi, Not sure if its the right forum, please feel free to move if not. Went out to a leak on an unvented cylinder and found all sorts of horribles, There was no benchmark, the PRV/ temp valve, PRV expannsion valve and Pressure reduction, all linked into the same 15mm pipe, terminating into an inline trap that went under the screed, on inspection it didnt actually connect to anything, just a hole in floor and big puddle. (The PRV/ temp was letting by and I suspect a faulty cylinder stat.) there is an existing 22mm copper pipe running into a 32mm sleeve under the screed that terminates outside the house ( Just a straight pipe into the air ) This has a tundish inside the house but is not connected to any pipework ?? There is not much scope for additional pipework as there is UFH, My question is do I report this and if so, who to ? the owner has only just moved in and there is no paperwork. I have said that I will make safe, replace the PRV, terminate the outlet correctly, and connect the pipework to the tundish, but that I'm not happy to benchmark it. Apologies if I'm asking the obvious, I am G3 but dont have that much experience of these kind of bodges.