Grit dog wrote:
PS I always thought the backflush caps with the hose connection were gray water drains.
That’s the only thing I use them caps for. Always pack an old garden hose with so I can be environmentally conscious and recycle and irrigate the local flora in the hot dry summer!
Lol.
I bought one of the basic caps with a garden hose fitting because it was see-though. One experience with leakage past the black tank valve when removing the cap is enough. Now I have a visual warning to be prepared for a problem. The garden hose connection is a bonus for draining any leakage before pulling the whole cap.