Pressure Relief Valve Home › Forums › Archives › Old Bulletin Board Archives › Pressure Relief Valve This topic has 0 replies, 1 voice, and was last updated 24 years, 11 months ago by Ty Blackwood. Viewing 0 reply threads Author Posts 20 Oct 1999 at 10:27 am #284872 Ty Blackwood HOW do I break loose a pressure relief valve on a water heater without messing up??? It has been in there for at least 5 years and I cant get it off Author Posts Viewing 0 reply threads The forum ‘Old Bulletin Board Archives’ is closed to new topics and replies.