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05-28-2011, 06:30 PM
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#1
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4 Rivet Member
2018 30' Classic
Ivins
, Utah
Join Date: Aug 2009
Posts: 424
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Shur-flo water pump cycles on and off
On my 2010, the water pump cycles on for about 1 to 2 seconds every 5 minutes. City water is disconnected, air has been carefully purged from all lines and water heater, and I have hunted for leaks and found nothing. I'll be adding this to the warranty cut list, but in the mean time, any suggestions on what else to look for are appreciated!
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05-28-2011, 06:54 PM
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#2
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Rivet Master
1969 31' Sovereign
Broken Arrow
, Oklahoma
Join Date: Jan 2003
Posts: 1,455
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Main cause for the pump to cycle;
Air leak on the supply side or water leak on the demand side.
__________________
Garry
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05-28-2011, 07:00 PM
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#3
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Rivet Master
Currently Looking...
1984 31' Airstream310
Ajo
, Arizona
Join Date: Mar 2007
Posts: 7,649
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Quote:
Originally Posted by garry
Main cause for the pump to cycle;
Air leak on the supply side or water leak on the demand side.
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What he said. I'd be leaning towards a slight leak, it does not take much to have the pump "make-up".
Have you looked at the area around the pump with a flashlight?
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05-28-2011, 11:15 PM
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#4
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4 Rivet Member
2018 30' Classic
Ivins
, Utah
Join Date: Aug 2009
Posts: 424
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Yep, checked the pump, under shower, bath vanity, galley, water heater, outdoor shower. No signs of leaky sink, shower, or toilet valve. No signs of leak thru belly pan. Perhaps a pinhole leak in the pex somewhere, but with the pump running so often, I would think i'd be able to spot water accumulating somewhere.... Is it possible that the pressure is bleeding off back thru the pump?
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05-29-2011, 04:25 AM
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#5
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Rivet Master
2014 25' Flying Cloud
Cuddebackville
, New York
Join Date: May 2007
Posts: 4,346
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Check the water heater blow off and drain plug.
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05-29-2011, 05:25 AM
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#6
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4 Rivet Member
2007 27' Safari FB SE
LONDON
, ON
Join Date: Dec 2006
Posts: 276
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Did you make sure the clear screw-on cap on this was tight? It is just before the pump and has been a cause of the same problem in our trailer.
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05-29-2011, 06:43 AM
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#7
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Rivet Master
1972 31' Sovereign
Lexington
, Minnesota
Join Date: Feb 2009
Posts: 3,991
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Quote:
Originally Posted by steverino
Is it possible that the pressure is bleeding off back thru the pump?
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Yes. The internal check valve could be dirty or have gone bad.
Chris
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05-29-2011, 08:29 AM
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#8
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3 Rivet Member
1970 25' Tradewind
San Antonio
, Texas
Join Date: Jan 2008
Posts: 166
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Hope you can help our pump problem also!? Our pump continually 'spits air' like there is air in the system...only happens when using the pump. Pump doesn't cycle on & off...just spits air. Had it at the AS Facotry last summer & they say is 'fixed' but not true. Any advice? Thanks!
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05-29-2011, 08:38 AM
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#9
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Rivet Master
1974 Argosy 26
Morrill
, Nebraska
Join Date: Nov 2009
Posts: 6,014
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@2Tex; Sounds like you have a leak on the input side of the pump. It is sucking air as well as water. It could be the inline filter or fittings where the hoses connect.
In regards to the first post; since you can't find any leaks. I think the internal check valve in the pump may have junk in it or calcium build up that prevents it from closing off completely. It may have just failed.
You can get an inline check valve and install it instead off replacing the pump.
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05-29-2011, 09:34 AM
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#10
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More than one rivet loose
Currently Looking...
Los Alamos
, New Mexico
Join Date: Feb 2006
Posts: 3,756
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I had manufacturing debris stuck in my first pump. It made it past the filter and got stuck in one of the valves of the pump. The pump was replaced under warranty.
__________________
Michelle TAC MT-0
Sarah, Snowball
Looking for a 1962 Flying Cloud
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05-29-2011, 11:00 AM
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#11
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Rivet Master
1961 24' Tradewind
1969 29' Ambassador
1970 21' Globetrotter
Jamestown
, Tennessee
Join Date: Jul 2008
Posts: 1,783
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There is a check valve in the pump head. A little debri can allow water to seep back into the tank, thus no apparent leak. Often with a little use the problem will clear itself, particularly if you don't use the pump a lot.
Usually on our first trip of the year the problem appears and then disappears in a day or two.
Repair parts are available if needed
__________________
Rick Davis 1602 K8DOC
61 tradewind, plus a few others
13 Ram 2500 TD
99 Dodge TD 577K miles
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05-29-2011, 01:51 PM
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#12
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Rivet Master
Commercial Member
2012 25' FB Flying Cloud
Celina
, Ohio
Join Date: Jul 2010
Posts: 542
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Quote:
Originally Posted by 2Tex4Fun
Hope you can help our pump problem also!? Our pump continually 'spits air' like there is air in the system...only happens when using the pump. Pump doesn't cycle on & off...just spits air. Had it at the AS Facotry last summer & they say is 'fixed' but not true. Any advice? Thanks!
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I had this problem when I added a short piece of sink tubing just before the filter. The manual said maximum length from tank should be no more than six feet, evidently that made it over that length.
Gary
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