Russ414
Our 12 volt water pump pressurized the line, but does not shut off...has run for 12-15 minutes and not reached a shut-off pressure. No apparent leaks (water or air) and city supply works fine.

Isn't this a demand pump, reaches pressure and then shuts off? Is there an adjustable pressure setting on the pump (thinking it might be adjusted incorrectly). Would like to troubleshoot before taking it to the dealer for warranty claim.
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Brian & Kathy
Try bleeding all the air out of the lines. Turn on sink both hot and cold, shower and toilet. The pump may be trying  to compress the air in the lines.  When we picked up our 177se I asked dealer if we need pump when  hooked to city supply, He said no. The trailer will run on city pressure there is a check valve in between pump and city supply. No h2o goes into the holding tank from city supply connection. If you run  pump with no h2o in tanks you can damage pump. Hope this helps. Brian 
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Russ414
Thanks for the feedback, Brian. All works well on city water, no issues. I'll try bleeding the lines, have run pump with faucets and toilet, will run inside and outside showers and see if that helps. Russ
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Alabama Jim
Please keep us posted as to whether or not running the water solves the problem.  I was thinking of the same solution.  It would seem if their is no air in the line, then there must be a leak in the line allowing pressure to decrease and keep the pump running. 
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Trent
On my first trip out earlier this month into the Rockies, I experienced low, low water pressure and constant pump running after about 4 or 5 days. Ending my trip and returning home. During return trip, one night with no water, then one night hooked to city water. Looking into the matter at home base, filled tank and turned pump on to start exploring and "what the heck". It's working just right. I am thinking the same " air in lines". Did run out of water several times during outing, so that may have contributed to air situation
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Nathan N Jen Cooper
Check the prepump filter. Either the lid is loose or as in my case it was cross threaded when installed. Didn't leak water but sucked air.. i removed the pre pump filter and reinstalled correctly and my problem was solved.
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James Amos
1 wants to always check for leaks on the suction side of the pump. Because if the tank is full of water it can drip and leak out onto the floor in that area. Read a post recently about a retro trailer that had a leak on the suction side of the pump and they left the tank full of water over a long time with no use and not draining the tank. It's slowly dripped out on the floor and ruined all the floor in that area. Hence the camper was junk. If the leak is on the pressure side of the pump and you leave the pump on while you're using it you will notice the pump turns off and on occasionally. That indicates there is a leak somewhere on the pressure side.
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Trent
There is always something to learn. After some 38 years of RVing 6 or 7 RVs and 12 years full timing, this is the first RV that had many challenges
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jackgomez
My water pump just stopped working during my last trip.  Where do I start troubleshooting. Is it fused? Under the bed for wire connections. Does not run with either the sink, toilet, or shower.
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