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Old 06-04-2010, 02:38 PM   #1
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1974 31' Sovereign
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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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Old 06-04-2010, 02:42 PM   #2
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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.
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Old 06-04-2010, 02:54 PM   #3
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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.
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Old 06-04-2010, 03:02 PM   #4
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Quote:
Originally Posted by Ganglin View Post
72 manual shows the pump on circuit 3 - which is fed by a 20 amp fused line.
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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Old 06-04-2010, 03:22 PM   #5
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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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Old 06-04-2010, 03:31 PM   #6
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Quote:
Originally Posted by HowieE View Post
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.
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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Old 06-04-2010, 04:17 PM   #7
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Quote:
Originally Posted by freejack5555 View Post
... 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?...
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. ...
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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Old 06-04-2010, 05:40 PM   #8
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Thanks for the input guys. On my way to the store..again.
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