City Water connected but still drawing from onboard fresh water tank

[holmesaz]

We hooked up at an RV park, connected the water line, verified that that the water in turned on, but we are still drawing from the fresh water tank onboard? It seems we have water coming up to the quick connection but I don't know why we are still drawing from our onboard water supply. Any ideas? Thanks


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[sheriff1]

Turn off the pump?


2015 F350 CC 4X4 6.7 Diesel
2010 27FB Silver Cloud "The Silver Spoon"

[holmesaz]

I tried that sheriff1, but I'll try again. Now I'm putting additional water in my fresh water tank just in case. Thanks!


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[holmesaz]

I turned off the pump and the flow dwindled to almost nothing.



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[Al and Missy]

Are you sure you are hooked up to the water inlet and not the black tank flush? On my 2002 Classic the water inlet is at the very left of the water compartment and is a plastic fitting. The black tank flush is a short length of hose.

If you or the campground have a backflow preventer inline, it may be stuck.

My 25 (bought used) came with a water filter. When I replaced the cartridge I put it in upside down. It fit fine but no water came through.

The trailer has a pressure regulator somewhere. I don't know where mine is, so I sure don't know about yours, but it may be stuck.

Lots of things to go wrong, and I have found most of them in my travels.

Al

[Protagonist]

Originally Posted by holmesaz

We hooked up at an RV park, connected the water line, verified that that the water in turned on, but we are still drawing from the fresh water tank onboard? It seems we have water coming up to the quick connection but I don't know why we are still drawing from our onboard water supply.

Quick connects are choke points, where the flow diameter is reduced compared to the hose itself. This makes it entirely possible for any sediment in the water line (and/or hard water deposits) to clog the line at a quick-connect. One time when I failed to run water from the spigot before hooking up, I ended up with a spider caught in a quick-connect, which gummed up the works until I found and removed it. Apparently the spider had built a web inside the spigot, which must not have been used in a while before I got there. Now I always run water through the spigot before hooking up.

Disconnect the hose, remove the quick-connects, and run water through the hose to flush it. Wash out the quick-connects to remove any accumulated sediments. Then put the quick-connects back on and hook up again.

[Hans Grim]

Originally Posted by Protagonist

Now I always run water through the spigot before hooking up.

Disconnect the hose, remove the quick-connects, and run water through the hose to flush it. Wash out the quick-connects to remove any accumulated sediments. Then put the quick-connects back on and hook up again.

Some of best and most effective fixes are the easiest. Am using this technique here in northern Newfoundland (St Anthony) where many spigots haven't been used in a while. Common sense prevails again. Thanks Protag.

[WestieHouse]

Originally Posted by Hans Grim

Some of best and most effective fixes are the easiest. Am using this technique here in northern Newfoundland (St Anthony) where many spigots haven't been used in a while. Common sense prevails again. Thanks Protag.

Newfoundland is fantastic! We spent a few weeks there last year about this time. We did discover a few places where we were advised to boil water before using it for consumption. Specifically, they were flushing the lines in Cow Head for a few days, and the Viking RV Park in Quirpon recommended we boil the water at all times. Needless to say, we did NOT fill our tanks or hook up directly to the supply during those stays.

We look forward to returning to NL again. This year we plan to head up the east coast of Vancouver Island for a few weeks. This is much closer to our home here in Washington State.

[holmesaz]

we returned to our home base a Eagle View RV Park at Fort McDowell, AZ and reconnected to the water source and everything worked fine. We had done all the suggested troubleshooting and still experienced the issue while a the other park. As far as I can tell, it was a case of insufficient water pressure.