To give you some background, I used my freshwater tank and pump recently and everything worked well. I rarely use the tank and pump and almost always,99.9% of the time, connected at the city water connection. I used my camper this weekend and was connected to city water and my water pressure was very low and kept dropping to a trickle. The pressure at the campground was freat and I do not use a pressure regulator, just a straight hose connection. I went and investigated and found the check valve seemed to be sitting crooked and possibly deformed. I straightened it out as much as I could without tools and the water pressure seemed a little better but still not great. I know a faulty valve can cause a leak when using the pump but could this valve be causing the low pressure when using the city water connection?
ItsyRV wrote: If the city water inlet is connected to a flexible hose/tube inside, it's a remote possibility the hose/tube somehow got kinked and is restricting flow.
Good point - that happened to mine. The city water inlet is the second from bottom white hose on the right in the photo I posted above. A short length of pex then flexible hose. I had to loosen the connections and twist the hose to get the kink out. You can see that it's still a bit restricted but not bad enough to worry about.
If the city water inlet is connected to a flexible hose/tube inside, it's a remote possibility the hose/tube somehow got kinked and is restricting flow.
A city water has a threaded "swivel" fitting on the interior side. Often inside a cabinet or behind a bank of drawers. You could get access to the interior side of the inlet and punch out the check valve. They're just cheapo plastic gizmos. I removed ours and replaced it with a commercial grade brass one. Perhaps that would help you?
AFAIK, check valves inside city water inlets are an integral part and you'd need to replace the inlet. That would require caulking it. I'd opt for a separate new one inside.
Is the filter screen still in the city water inlet? They can sometimes plug up with silt & debris. Same thing can happen to the check valve.
A regulator is always a good idea. CG water pressure can get very high and I've heard of it getting as high as 200 psi. We've seen as high as 140 psi. If you travel around much, you won't know what kind of pressure you'll have. Also, sometimes pressure can be at an acceptable level but there can be a surge that could possibly cause damage.
I know this is a pretty pathetic diagram, but it represents exactly what's in the photo I posted above. If your rig is like mine, the check valve is the only thing between city water and rig plumbing.
It's probably a defective check valve. The valve may have come out of the the mount, missing retainer clip. That's why it appeared crooked,out of place. With the pressure from the city water, it's pushing the valve piece too far and obstructing water flow. It probably doesn't stop the water from leaking out when using the pressure pump either. Relativity cheap and easy to replace..
Ken
2006 Winnebago Outlook 29B E-450. 2012 Honda CR-V AWD Blue Ox Aventa LX tow bar and Brake Buddy Vantage.
