I'm convinced I have a leaking 'overpressure relief valve', the notorious 000111 valve referred to by Andy at Inland RV. Mine is in a '77 Globetrotter, tucked under the lower deck of the vanity, but above the plywood subfloor, in a very difficult-to-access spot. Can't go in underneath because of the rear bumper/waste plumbing, nor easily from above due to vanity bottom and adjacent black water tank
Does anyone have experience replacing that valve without having supported the sweated connections surrounding the valve. I think I can get a wrench on the flare connection, but am worried I'll make things worse by breaking a joint.
What have your experiences been regarding the strength of those sweated connections?