Changed out my 250 gal., leased propane tank for one I bought. I want to be able to shop for propane, instead of being stuick with one company. I bought a used 172 gal. tank that had a couple of leaks - the fill valve & the gauge. I removed the fill valve, cleaned the threads on it & the tank, put new sealant on the threads & reinstalled it. I had to buy a new gasket for the gauge base. Presurized it to 125 lb. to test it, & it worked out OK. Cleaned & painted it. I don't need a big tank, since I use less than a quart of propane a day.