The washers in my l.p. drains are a special cone shaped washer. Very easy to loose. You'd want to have a couple spares. The threads on those are not 1/2 npt they are 1/2 nps. Close but no cigar! Straight threads not tapered pipe threads, hence the need for the cone washers and most likely limited luck with PTFE tape.
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2016 Flagstaff 27VRL Emerald
14K Equalizer
2020 Silverado 2500HD CC 4X4 6.6L gas 3.73
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