Those low point drains were always a pain to use. Every time we opened those drains, we could never get them to seat back down without a lot of finagling. They finally were leaking badly that we could not get to stop, so we changed them out.
Here are the old plastic ones
Here are the new brass sharkbite ball valve
Moved the lines a little forward so now the draining water does not hit the frame anymore.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting