Originally Posted by Kevin K
I think this is a original 1983 regulator. My problem is the white thing on the top rotted away.
What is it for?
Did a soap test NO gas leaks.
Should I replace it?
The cover is important for two reasons. One, it prevents a very small leaking of gas through the regulator adjustment mechanism. I have been able to hear a slight whistling noise on occasion when I have had the cover off. Two, the pressure adjustment is directly inside the cover. Without the cover, your propane
pressure could get adjusted without you realizing it.
New two stage regulators are only about 30 bucks at any RV dealer, so I would replace it. The old one stage regulators are no longer considered to be safe, although they worked fine for decades. Plus, if the cover has rotted away, I would wonder why. It seems very odd.