Plumbing

Leaky Concealed Valve Shower

Anonymous user 09/03/2024 - 3.15 PM

Afternoon folks,  Hoping for a bit of advice!  I've recently gutted my poorly finished en-suite and have started rebuilding. I've come to the shower and am having issues sealing it before closing up the wall for tile. It's a concealed valve shower and male compression couplers (15mm x 3/4") are required for the hot and cold feeds. I can't seem to get the threaded connection on the cold inlet to seal. The compression end is fine, no leaks. On the threads themselves I've tried: 1. Jointing compound (Fernox Water Hawk) 2. Jointing compound with new couplers 3. PFTE (3-4 turns) (leak much worse than before) 4. PTFE (6/7 turns)  5. PTFE (10-12 turns) The most recently attempt has still resulted in a steady drip of water from where the coupler meets the valve. Any ideas?  I contacted the supplier who said 12 turns of PTFE is an installation error and won't replace the valve, despite not being able to offer any installation recommendations. Have I genuinely made a mistake? What would some of the plumbers on here have done?  (I am a fairly experienced DIYer but had help and advice from someone with much more plumbing experience) Thanks in advance!!