I put that white 1/2” cap on there.
Which was recommended from my last post yesterday. Yay or nay ?


Make sure it has a rubber washer in the cap or it’ll leak.


Something’s wrong with your other low point drain if water isn’t draining when there’s no cap. The plug will work but ball valves make it easier to winterize

Source: Low point drain water going through (first rv) second post follow up

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