Thread Tools Search this Thread Display Modes
Old 01-10-2019, 11:07 AM   #1
2017 22' Sport
Phoenix , Arizona
Join Date: Jul 2016
Posts: 36
Images: 2
Question Replacing a Sureflow Revolution 4008 3gpm pump. Do I need to?

Hi everyone.
I have a 2017 Sport 22' with a Sureflow pump. The past couple of weeks I have noticed that when the Airstream is connected to city water, the front water tank is filling up (about 20% every day). I have to keep pumping it out. I have folks staying in the Airstream, so need to be connected to the city hookup.

I am thinking it is a sticky valve inside the pump, but don't know how to fix it (I'm a girl....but absolutely willing to learn). Hey, I physically participated in every aspect of building my first home in New Zealand :-)

Questions: Can I repair this myself? What are the steps?
I have purchased a replacement pump (Sureflow Revolution 4008 3gpm) for if I can't fix it, but would love some guidance on how I swap the pump out or what to do.
Does anyone know of a good RV repair guy (or girl) in the Phoenix area who does house calls...

BTW: Charley can't fix it....he's a dog :-)

thanks everyone
Marygb is offline   Reply With Quote
Old 01-10-2019, 12:08 PM   #2
Rivet Master

2007 22' International CCD
Corona , California
Join Date: Jul 2013
Posts: 8,396

Quick possible fix is to disconnect shore water supply, turn on the pump switch, and run water from a faucet until the pump turns on. Let the water run for a few seconds, then turn it off until the pump stops again. Then do this a couple more times.

Sometimes a bit of grit or other 'stuff' gets into the pump and starts a slow leak in it's internal check valve--this is why city water is slowly flowing backwards through the pump and filling your fresh water tank.

Try this flushing trick first, then, if this procedure doesn't solve it, locate the pump (usually the hardest part) and replace it.

Be sure to turn off city water, drain and/or blow out the trailer internal lines like you are winterizing, then the pump should be easily replaceable. Usually the fittings screw on by hand, and the electricals are just trace and connect--I'd take a picture or three for reference when you put it back together. Once you get the new pump in place, get a rebuild kit for the old one, and rebuild it for a spare.
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.
rmkrum is offline   Reply With Quote
Old 01-10-2019, 01:19 PM   #3
3 Rivet Member
2015 28' Land Yacht
Chapel Hill , North Carolina
Join Date: Nov 2018
Posts: 152
replacing shut-flo

Hi Mary,

I just replaced a model 4008 shurflo in our 2015 Airstream last week (in Phoenix too!) - it's a cinch. That said, I see the prior post made some suggestions for troubleshooting so it would probably make sense to try that first.

Once you've located the pump for troubleshooting or replacement, here's what I found:

1. Buy a new water pump. They are really common and I found them at Camping World, the Airstream or any other RV dealer, or online at Amazon (that's where I got mine).

2. The pump connects to the plumbing with threaded fittings to flexible tubes on the input and output. Mine were just finger tight, so only have to twist them off. Strongly suggest you make sure the city water and water pump are turned OFF first :-). Also, keeping a small towel to mop up what little water will spill out makes it easy.

3. Unscrew the four screw that go through the rubber feet that hold the pump tot he airstream.

4. The electrical connection is simply a power and ground, though mine were crimped together, so I had to cut the wires and then stripped and used wire-nuts to reattach. Slightly neater would use blade (fast-on) connectors, but I didn't have a crimper or the connectors handy.

4. Screw down the new one.

This process took me all of about 20 minutes. if you have the wire nuts or fast-on crimpable connectors before you start the job it should take, literally, about 8 minutes - the most time consuming is just unscrewing and rescrewing the 4 screws for the rubber feet.

That said, if you don't want to do this yourself, I'll be back in Phoenix in about 2 weeks and happy to help, or you can try to get someone to do it for you. I'm transient in Phoenix but needed some refrigerator repair work and referred to Vision Mobil RV at 480-490-2550. I left a message and the individual called me back promptly and was VERY professional and helpful. I have not yet used his services, but he was recommended to me and I'd recommend him based on his phone professionalism (amazing how many places can't even seem to do that well).

HappyHapgood is offline   Reply With Quote
Old 01-11-2019, 08:16 AM   #4
2017 22' Sport
Phoenix , Arizona
Join Date: Jul 2016
Posts: 36
Images: 2
excellent thoughtful and instructive replies. thanks everyone.
Marygb is offline   Reply With Quote
Old 01-11-2019, 10:29 AM   #5
Rivet Master
greghoro's Avatar
2013 25' Flying Cloud
Wheaton , Illinois
Join Date: Aug 2014
Posts: 523
If you are replacing with the exact same pump, then simple, as stated in prior replies.

However, if you replace with a different model, you might find that the mounting and or the water inlet/outlet positions is different, complicating the replacement.

Also, when removing the water connections from the pump, be very diligent in watching for gaskets inside the connections, as they can fall out. If your pump is mounted in such a way they can fall into an area below you can't get to, put some cardboard under the pump as a precaution. While I encountered this problem when replacing my pump, I've been told that not all pump connections have gaskets.

greghoro is offline   Reply With Quote
Old 01-11-2019, 04:56 PM   #6
3 Rivet Member
harryk's Avatar
2005 31' Classic
Venice , Florida
Join Date: Dec 2013
Posts: 174
That pump may not have a backflow valve...check the literature. I had one in my other airstream and it was a great pump but I had the same problem. I then installed a backflow preventer and problem solved. When you check the literature packed with the pump, myne said backflow preventer NS. Not sure if that meant not supplied or not shown. Called sureflow for answer...they did not know !
harryk is offline   Reply With Quote
Old 01-12-2019, 01:56 AM   #7
3 Rivet Member
Ronman's Avatar
2007 27' Safari FB SE
Rancho Murieta , California
Join Date: Aug 2012
Posts: 246
Are you out of warranty?
Ronman is offline   Reply With Quote
Old 01-12-2019, 08:30 AM   #8
2017 22' Sport
Phoenix , Arizona
Join Date: Jul 2016
Posts: 36
Images: 2
Yes, Ronman, the warranty ran out several months ago.
Marygb is offline   Reply With Quote
Old 01-12-2019, 08:38 AM   #9
2017 22' Sport
Phoenix , Arizona
Join Date: Jul 2016
Posts: 36
Images: 2
harryK. I'm not finding any mention of a back flow valve, but from an earlier thread I read, I think the NS means Not Supplied. Now that I've read the instructions sent with the pump, I'm all but certain that I just need to sanitize the water system with bleach. The mineral content of the water here in Phoenix is lousy. Time for a flush out, then I'll see how it runs.
Marygb is offline   Reply With Quote
Old 01-13-2019, 10:18 AM   #10
3 Rivet Member

Annapolis , Maryland
Join Date: Jul 2017
Posts: 117
My only addition/admonition is to avoid using wire nuts. In the marine industry, wire nuts are not used because they can vibrate loose and create a live wire danger. I suspect the same is true for travel trailers. I would use crimp connectors.
rhpeahl is offline   Reply With Quote
Old 01-13-2019, 11:23 AM   #11
Rivet Master
KJRitchie's Avatar
2008 25' Classic
Full Time , Texas
Join Date: Nov 2012
Posts: 4,309
I had the same issue with a one year old Shurflo. I purchased the check valve replacement kit. I had to remove the pump but replacing the check valve solved the issue. Costs about $20.
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
KJRitchie is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone replace OEM aquatic II water pump with Sureflo Revolution? bonginator Water Heaters, Filters & Pumps 1 08-01-2014 09:06 AM
Turning off Sureflow system when connected to city water bonginator Water Heaters, Filters & Pumps 18 05-06-2010 08:37 AM
Sureflow is wheezing and sputtering Sovereign42 Fresh Water Systems 2 10-28-2009 05:35 AM
Thoughts on Revolution RV? AronS Trailer Values 15 09-26-2008 04:04 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 03:51 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.