I bought a new surplus AMSE tank from timsrvinc.com for the one that was leaking on our class C. It had more gas leak detector sprayed on the fittings than I care to recap on. The valve and all parts that had opening to tank not a bit of leakage. Leaving unit in storage it would leak out and when you were around it you could smell the propane. Found out that the welds on the brackets had rusted into the tank, the tank itself was not that rusted. Anyway the cost of the tank was really good, with free shipping. The place that installed it had to re-manufacture the brackets but now it fits better than the old tank, easier to fill and no more smell. The shop I used charges $95.00 an hour but wish I could tell you what it would cost for labor but that really depends on where you are at.