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

notsogreatbutok:

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

Common-University-59:

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