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Replacing Old Faulty Bulldog TRV | Screwfix Community Forum
The Bulldog valve body is faulty. For some reason that happens some of the Peglers Bulldog and Terrier TRVs bodies. Both are interchangeable, but I would just buy another Bulldog valve. Coincidently I was at one an hour ago with same problem. Most 15mm TRVs that have the deeper pipe distance will swap over without replacing nuts and olives. But ...