DIY Doctor

Sealing Leaks in Valient Combi Boiler When Heating on

Postby ?BOB? » Sun Oct 07, 2018 4:52 am

Earlier in the year started to loose pressure in Valient Combi Boiler when heating on , small top up about every 2/3 weeks. Seemed ok during Summer (occasional top up) When heating switched on last month used Fernox Express Leak Seal Is much better but still get small drop in pressure, builds up once heating on. Can I give it another application? 9 Radiators, or do I start lifting floorboards? to find problem. No obvious sign of any leak from upstairs on ceilings. Thanks for any advice. ?BOB?
?BOB?
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