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07-30-2019, 08:50 PM
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#1
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Senior Member
Join Date: Apr 2012
Posts: 122
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Fresh Water Overflow HELP!
I'm ful-timing and about two months ago we noticed that our fresh water tank will fill up then over flow even thou the fill bypass valves is in the Normal position (city water to the faucets). Also noticed that the water pump cycles a lot more often than it use to. Maybe 3 to 4 seconds every 3minutes. If I didn't know better I would think the fresh water from the city connection is leaking through the pump, or the bypass valve, into the storage tank.... (It takes about 40hours for the tank to fill)
Has anyone else experienced this? Guess I could change the pump. This pump is two years old.
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2003 Fleetwood Discovery 38U
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07-30-2019, 08:55 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,652
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That fill/normal valve is leaking.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam 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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07-30-2019, 09:07 PM
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#3
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Senior Member
Join Date: Nov 2015
Posts: 26,689
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Could be the pump internal check valve (diaphragm) not fully closing due to mineral build up or small debris
Short cycling of pump is symptom of a minor leak.
FILL Valve or pump check valve.
Whichever is easiest access:
*disconnect pump suction line and see if city water flows backwards thru pump
*disconnect fill line AFTER fill valve and see if city water leaks thru
Pump cycling.suspect pump check valve
Sometimes just using the pump and running off the fresh water tank will clear the pump check valve. (turn city water off)
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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07-30-2019, 10:18 PM
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#4
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Senior Member
Join Date: Jul 2015
Location: College Station TX
Posts: 132
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Had similar issue. It was the pump check valve. City water seeping backwards I Noe fresh tank. Replaced pump an problem solved.
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07-31-2019, 09:55 AM
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#5
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Senior Member
Join Date: Nov 2015
Posts: 26,689
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Quote:
Originally Posted by Rodzent
Had similar issue. It was the pump check valve. City water seeping backwards I Noe fresh tank. Replaced pump an problem solved.
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That's one way.....
Disassemble pump (few screws) and clean diaphragm or replace are 2 less expensive ways
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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07-31-2019, 01:25 PM
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#6
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Senior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Mar 2017
Location: Georgia
Posts: 477
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Occasionally, my tank fill value will leak, thereby filling the freshwater tank (in 30 or so hours). If I had been running on the water pump, yes it would have cycled on as the leaking fresh water fill dropped the line pressure. I just go out and exercise the valve and all is good until it gets knocked slightly out of position and starts filling the fresh water tank again.
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Steve & Margo
Bonaire, Georgia
2018 Fleetwood Discovery 40D LXE "Alice"
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07-31-2019, 01:31 PM
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#7
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Senior Member
Join Date: Jul 2018
Posts: 3,165
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Quote:
Originally Posted by Rodzent
Had similar issue. It was the pump check valve. City water seeping backwards I Noe fresh tank. Replaced pump an problem solved.
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Rebuilding the pump is much cheaper. kits on Amazon.
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2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
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07-31-2019, 02:05 PM
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#8
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Senior Member
Join Date: Jun 2017
Location: Bryan Tx
Posts: 1,023
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Same issue,when I got my coach. Was the Auto fill solenoid leaking,took the top off and cleaned the valve. Much easier then changing the whole solenoid. Still have the new spare I bought
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“06” Beaver Patriot Thunder , 525 HP C13 Cat
MH 4000 Allison
42 ft Vicksburg, 4 slides
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08-01-2019, 12:59 PM
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#9
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Senior Member
Join Date: Apr 2012
Posts: 122
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Thanks for the quick replies. I've ordered replacement diaphragm assembly.
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2003 Fleetwood Discovery 38U
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09-11-2019, 07:29 AM
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#10
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Senior Member
Join Date: Apr 2012
Posts: 122
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Well, I installed the replacement diaphragm, but that didn't solve the filling of the freshwater problem . Matter of fact the pump eventually failed, sprang a leak thru the body. I ended up putting in a new pump.... The new one definitely runs better, more pressure. but still a leak somewhere. The new pump cycles on and off every 40sec. Any suggestions where I might look for the source of the problem???
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2003 Fleetwood Discovery 38U
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09-11-2019, 07:33 AM
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#11
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Senior Member
Join Date: Apr 2012
Posts: 122
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Quote:
Originally Posted by Ray,IN
That fill/normal valve is leaking.
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You are probably right ... One of neighbors thought the same thing. Not looking forward to attacking this maze of plumbing to change this valve.
__________________
2003 Fleetwood Discovery 38U
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