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06-04-2010, 02:38 PM
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#1
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1 Rivet Member 
1974 31' Sovereign
Scottsdale
, Arizona
Join Date: Nov 2009
Posts: 10
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Water pump fuse
So I just brought my 74 31' home and I'm trying to get the plumbing to work. I have power but my water pump isn't coming on. After trying to track down the problem it looks like there is an inline fuse just before the water pump that seems to be missing. Can someone help my out by telling me what type of fuse this requires? Thanks.
Just a side note, please don't tell me about the search feature. I have used it already and I'm unable to find it. Sorry if this is a repost but I just need the help. I appreciate all of you.
Casey
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06-04-2010, 02:42 PM
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#2
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My Grandparents Airstream
2007 28' Safari SE
Hillsboro
, Texas
Join Date: Dec 2002
Posts: 174
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I would think a 15 amp fuse would be plenty good. Put one in and see if it works. I would have to look at a new one to see what they are rated at amp wise,but a 15 should work.
__________________
Andrew Selking
WBCCI #6062 
International 3rd Vice President
"Airstream the Best trailer ever built."
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06-04-2010, 02:54 PM
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#3
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Rivet Master 
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,064
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Look at the wire size. If it is 12 or 14 the 15 amp fuse will work. If it is 16 gauge wire, smaller, don't go above a 10 amp fuse.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
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06-04-2010, 03:02 PM
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#4
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Rivet Master 
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,064
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Quote:
Originally Posted by Ganglin
72 manual shows the pump on circuit 3 - which is fed by a 20 amp fused line.
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The line may be fused at the panel at 20 amp but that circuit may have other loads such as lights on it. His question was for an inline fuse directly before the pump.That fuse should be less than the circuit fuse if there is any additional load on that circuit.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
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06-04-2010, 03:22 PM
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#5
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Rivet Master 
1971 27' Overlander
Central
, Ohio
Join Date: Jun 2006
Posts: 2,365
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So I'll finish my thought now.
You should try to find the pump diagram on line - Shurflo which is what I have for example varies between 5 and 10 amp inline.
Electric Automatic Demand Pumps
On their site you can select the pump and then the product data sheet for the fuse requirement. Good luck with your repair.....
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06-04-2010, 03:31 PM
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#6
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Maniacal Engineer
1971 25' Tradewind
Menlo Park
, California
Join Date: Jan 2010
Posts: 1,239
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Quote:
Originally Posted by HowieE
The line may be fused at the panel at 20 amp but that circuit may have other loads such as lights on it. His question was for an inline fuse directly before the pump.That fuse should be less than the circuit fuse if there is any additional load on that circuit.
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Well, the fuse is there to protect the motor; the line is protected by the panel fuse. Thus, the in-line fuse can be whatever size is needed to protect the motor; if the total load of all motors, lights, etc. exceed 20A the panel fuse for the line will blow.
- Bart
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06-04-2010, 04:17 PM
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#7
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Rivet Master 
1967 26' Overlander
Huntsville
, Alabama
Join Date: Dec 2003
Posts: 2,987
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Quote:
Originally Posted by freejack5555
... it looks like there is an inline fuse just before the water pump that seems to be missing. Can someone help my out by telling me what type of fuse this requires?...
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Casey,
My current FloJet VSD water pump requires a 15 amp fuse. The Airstream's original PAR pump did not have a fuse. But I know it drew 5.2 amps in normal operation. A 15 amp fuse would have been suitable for it too. Whatever pump you have will probably be happy with that fuse.
Quote:
Just a side note, please don't tell me about the search feature. ...
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Let me tell you about the Search Feature
Don't use the button at the top of this screen. Instead, go to Google.com, and enter " water pump fuse site:airforums.com".
You will encounter less frustration, and more useful information.
Tom
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06-04-2010, 05:40 PM
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#8
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1 Rivet Member 
1974 31' Sovereign
Scottsdale
, Arizona
Join Date: Nov 2009
Posts: 10
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Thanks for the input guys. On my way to the store..again.
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