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Old 09-01-2011, 12:48 AM   #15
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I have had similar problems with my 4.0. (similar to the 5.7, but smaller) But now it's working ok. Here's my fixes-
1. The filter has to be the Shurflo recommended one.
2. There can not be a tee on the input for the winterizing antifreeze (it sucks air).
3. And a few years ago there was a forum item that said the factory said to adjust the center screw (pressure) all the way clockwise, then back counterclockwise one half turn. And sure enough, that fixed it.
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Old 09-03-2011, 03:51 AM   #16
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If it makes y'all feel better, I have heard that the 5.7 is now gone. Apparently the factory has given up (along with it's users)
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Old 09-03-2011, 08:52 AM   #17
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I had a 97 Adventure that I replaced the pump with a 5.7 and also a 2003 Chieftain that I replaced the pump with a 5.7. I never had a problem with either of these coaches and I owned them both for 5 years. I just had a problem with my recently purchased Horizon. The Adventure and the Chieftain had a small pressure tank and the Horizon does not. The pump cycles much more frequently with out a pressure tank. I know ShurFlow says we don't need a pressure tank but I wonder if the absence of a pressure tank shortens the life of the 5.7? What are your thoughts?

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Old 10-06-2011, 07:19 AM   #18
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Sur-Flo sent replacement

It turns out the new 5.7 extreme I purchased from Americanrvcompany.com was defective. I had emailed and called Shur-flo but did not receive a response. American RV emailed me and asked I review the purchase, I called to let them know it would be a poor review. They immediately called Shur-Flo for me. Long story short is I had a new pump within 7 days, installed it and it is working great. We now have very good pressure from a very quiet pump.

American RV stands behind their sales and knew how to get Shur-Flo off the dime fast. They have earned my repeat business. Thanks to everyone that posted on this subject!
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Old 10-06-2011, 09:44 AM   #19
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I have the ShurFlo 5.7 and it quit working right after i purchased our new to us 05 Itasca Horizon. I replaced the sensor and it has been working fine ever since
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Old 10-08-2011, 05:15 AM   #20
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Quote:
Originally Posted by lwasouth
I have the ShurFlo 5.7 and it quit working right after i purchased our new to us 05 Itasca Horizon. I replaced the sensor and it has been working fine ever since
Como? Where did you find the sensor? The factory flat out said that was a discontinued design and they wouldn't work on nor support it.
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Old 10-08-2011, 06:39 AM   #21
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Have had no problem getting replacement 5.7 from Shurflo, but they don't last long!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 10-08-2011, 07:05 AM   #22
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I put a shurflo extreme 5.7 in our Knight last weekend, I purchased it from CW in September. We'll see how it holds up, but initially, it works very well.
The directions are specific about removing any pressure tank (dint have one) replacing the inlet screen with thier specific new one (did) and using thier silencer kit with the long flex hoses (did)
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Old 10-09-2011, 09:30 AM   #23
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I actually got it from Honeywell as a sample of a new type sensor that ShurFlow decided not to use or make available. I was told I got the only sample available.
I know this doesn't help, but that's the story
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