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07-20-2008, 04:02 AM
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#1
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,600
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We are at Artillery Ridge CG, Gettysburg, PA. The water pressure is low. When this happens I use the coach tank and pump help the CG PSI. The CG water pressure is around 20-25 PSI. When I turned on the pump, the pump would run for a few seconds about every 15 seconds. The bottom line is I turned off the CG water and the pump no longer ran in the short bursts. Turned the CG water back on and the pump continued to run for a few seconds about every 15 seconds. Me thinks the CG PSI is strong enough to open the coach check valve but below the PSI that turns the pump on. The coach pump comes on and raises the PSI enough to close the coach check valve and the pump turns off.
Has this happenned to anybody? It is a first time for me.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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07-20-2008, 04:02 AM
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#2
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,600
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We are at Artillery Ridge CG, Gettysburg, PA. The water pressure is low. When this happens I use the coach tank and pump help the CG PSI. The CG water pressure is around 20-25 PSI. When I turned on the pump, the pump would run for a few seconds about every 15 seconds. The bottom line is I turned off the CG water and the pump no longer ran in the short bursts. Turned the CG water back on and the pump continued to run for a few seconds about every 15 seconds. Me thinks the CG PSI is strong enough to open the coach check valve but below the PSI that turns the pump on. The coach pump comes on and raises the PSI enough to close the coach check valve and the pump turns off.
Has this happenned to anybody? It is a first time for me.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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07-20-2008, 04:29 AM
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#3
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Senior Member
Join Date: Dec 2007
Location: Wellington, FL
Posts: 148
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If the CG doesn't have a backflow preventer on it's spigot and since most RV pumps are at least 40+PSI seems you would be the Hero of the CG for building it's pressure. Why not put your pressure gage on the CG spigot with water pump on and off readings to be sure.
__________________
2002 Newmar Dutchstar 3852
Ted, Nancy & Our Westie's Nikki & Willie
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07-20-2008, 05:06 AM
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#4
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Senior Member
Tiffin Owners Club Fleetwood Owners Club Appalachian Campers
Join Date: Jul 2007
Location: Titusville, FL
Posts: 694
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Gary,
We are in the same CG, Site # 48. We have not had any problem with the water pressure at all over here. Could be the water run you are on.
When you run off your tank is the switch at the fill switched from fill to normal?
Stop over and say hello, not sure where you are.
Mike and Janet
__________________
"Home is where we park it" SEMPER FI 
Winnie 30 RESS UltraLite TT 2015
Ford F250 XLT 2015
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07-20-2008, 06:43 AM
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#5
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Senior Member
Pond Piggies Club Mid Atlantic Campers
Join Date: Jan 2000
Location: Fayette Ridges of PA, USA
Posts: 999
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I would suspect that the check valve on your water inlet might be leaking slightly.
Try this test:
Disconnect the water hose from your rig's water connection but don't replace any cover ot cap it may have. Then pressurize your water system with your pump. Go back outside and watch to see if any water starts dripping out of the inlet. If it does, the check valve is leaking and, eventually, your pump will kick on momentarily to repressurize the line; the same as what you're experiencing with the hose connected.
However, you might not see any water at all coming from the water inlet which means the check valve is OK. If this is the case, then I'd have to say that there is just enough water pressure from the campground's water line to reduce the effectiveness of the spring that holds the check valve closed (remember! in my test, there would be no pressure on the connection side), thus allowing the higher pressure water in your rig to slowly backflow into the hose.
__________________
2009 GMC Sierra 2500HD | Crew Cab | Standard Box | 4WD | Duramax/Allison
2000 Jayco Eagle 266 | FBS | TT
1986 Coleman Laramie pop-up -- Still in the family!!!
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07-20-2008, 07:38 AM
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#6
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Senior Member
Monaco Owners Club
Join Date: Jun 2005
Location: Was Fairbanks, AK now Somewhere, Lower 48
Posts: 796
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We were at a CG in Boise, ID. Everytime they were watering the lawns the pressure would go down to nothing and we had to run our pump and use the water from our tanks. I'm glad we had just finished adding water to the tank a couple of days beforehand.
Live and learn, learn and live.
AKBrick
__________________
2007 Safari Cheetah 40SFD 350 CAT / Allison 3000 / RR8R chassis.
2007 Saturn Vue Auto/front wheel drive toad. Blue Ox Aladdin tow bar. Apollo brake system, Pressure Pro, Surge Guard. 2 Norwich Terriers. Dog shows, golf, RETIRED, fulltimer.
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07-20-2008, 01:21 PM
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#7
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,600
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Thanks for all the replies. The problem is definately the CG. I went to see Mike. Even though he is only 3 numerical sites from me, he is accross the main CG roadway. Our water may come from a different leg in the supply system.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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07-20-2008, 03:31 PM
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#8
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Senior Member
Tiffin Owners Club Fleetwood Owners Club Appalachian Campers
Join Date: Jul 2007
Location: Titusville, FL
Posts: 694
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Gary,
Thanks for stopping over, it was a pleasure to meet you.
You may not have great water pressure but at least you have a level site. Takes us 2 ladders and a knotted rope to get in and out of the coach
Mike
__________________
"Home is where we park it" SEMPER FI 
Winnie 30 RESS UltraLite TT 2015
Ford F250 XLT 2015
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07-21-2008, 01:04 AM
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#9
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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This is one of several reasons I keep water in the holding tank once we get set up in a new campground. You never know when they will loose their water. Also have a good whole house filter so if a line was repaired and had dirt in it the filter will catch it and keep it out of the coach and other finer filters.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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07-21-2008, 06:52 AM
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#10
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Senior Member
Monaco Owners Club
Join Date: Jun 2005
Location: Was Fairbanks, AK now Somewhere, Lower 48
Posts: 796
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RV Wizard,
Yup, your right on the money with that last post. We've had parks that had to have water pumps repaired and our own water tank saved us often. It's nice to be self contained as long as you do keep some water along for the ride and stay. I also have two filters that keep out the junk before the water enters the motorhome.
As the Boyscouts always say, "be prepared".
AKBrick
__________________
2007 Safari Cheetah 40SFD 350 CAT / Allison 3000 / RR8R chassis.
2007 Saturn Vue Auto/front wheel drive toad. Blue Ox Aladdin tow bar. Apollo brake system, Pressure Pro, Surge Guard. 2 Norwich Terriers. Dog shows, golf, RETIRED, fulltimer.
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07-21-2008, 04:02 PM
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#11
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 32,253
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Logically such a happening cannot occur. If the CG water pressure is higher than your onboard pump low pressure cut-in, the pump will never run. If the CG pressure is lower than the coach pressure the check valve will never open. A faulty check valve or other small leak is likely.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;GS Life member,FMCA " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-22-2008, 07:00 AM
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#12
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 28,508
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You have a faulty check valve in the city water inlet. Any time the RV internal water pressure exceeds the campground supply pressure, that check valve should close. And water cannot backflow through that check valve to the campground without a positive pressure differential on the RV side.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is now West Palm Beach, FL
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