2012 Thor Tuscany 42' motorhome. Long story short, the tank level gauge that is screwed into the side of the tank is leaking around the threads when I had the tank filled. I tried to tighten but did n...
Flare fittings should NEVER use any sealant. If it is leaking there is dirt or damage at one or both sides of the flare. The whole idea of a flare fitting is to make a metal to metal seal. The nut that tightens it down has no sealing ability, it is just a way to apply pressure to the flare to make the seal.