Bob
Hard to say how hard it is to swap out. It appears that SOME check valves come with the complete plastic housing (with door & lock). My city water connection appears to be part of the plastic housing. Should be an easy swap. Stronglt suggest you carry a plug for that city water connection. If that check valve goes south you will hae ZERO water pressure from the pump. Could end up cutting a camping trip short.
Look at the backside of that city water connection while connected\leaking to see if it's also leaking on the backside.
Robert McHenry
Currently, Henniker NH
07 Fleetwood Discovery 39V
1K Solar dieselrvowners.com
2005 Jeep Grand Cherokee
Prior:1993 Pace Arrow 37' Diesel