Slow Leak in the Air Mattress
Worked fine until recently. I find that a small amount of air is leaking from the manual valve. (tested under water). The rubber flapper holds only when there's pressure inside and it's not sealing completely now when full. I've cycled the lever back and forth and don't know what else I can do for a good seal.
2012 F150 F/X 4, 6cyl EcoBoost with Max tow pkg
2013 Rockwood 8280WS 5th wheel
2006 Sunline T1950
2004 T@B T-16