Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-19-2009, 04:03 PM   #1
4 Rivet Member
 
hshovic's Avatar
 
2007 25' Safari FB SE
Bozeman , Montana
Join Date: Apr 2007
Posts: 253
Images: 20
Shurflo extreme 4 pump acting oddly

Greetings,

Last year I installed a Shurflo Extreme 4.0 pump. It worked fine for awhile, but I am having some problems now.

The major problem is surging. With any of the fixtures open, it surges from low to high to low to high.... But that is not all. Various pump people say it is because of an air leak on the inlet side. I found just the opposite.

I have a valve upstream for adding antifreeze. Just on a whim I opened this valve while the pump was surging, and it stopped surging. It sucked air for a while. Then I closed the valve, and the pump began picking up water again, and now it does not surge! It works fine.

Then I opened another fixture for awhile. Then it starts surging again.

So what gives?? Adding air actually fixes the problem..
__________________
Hank
WBCCI 1489 AIR 20708
2015 Chevy 3/4 ton 4 x 4 gas; 2007 Safari FB SE
"Its better to light just one candle than to curse the darkness,
Unless you're blinded by the light..."
hshovic is offline   Reply With Quote
Old 11-20-2016, 01:19 PM   #2
Rivet Master
 
MarkR's Avatar
 
1951 21' Flying Cloud
1960 24' Tradewind
Folsom , California
Join Date: Dec 2003
Posts: 727
Images: 12
Any ideas what causes this? I was on a trip a months ago and the water pump worked fine.

Now getting ready for another trip and it's "surging" really bad (pump is relatively new) . . . I've tried a few things like

Cleaning the Filter (it was spotless).

Cleaning the "bubbler thingy" on the end of the kitchen faucet (also spotless), found another filter screen on the other end of the Kitchen faucet/wand . . . also spotless.

Tightening a few hose clamps at the tank, the hoses on the pump, hose to city water connection point . . . (tank is full).

Tried running the water with all fixtures going to get air out (it doesn't surge when doing this, the pump just stays on full time . . . ran it for 10+/- mins.)

As I understand it there's an adjustment screw on the pump, but I thought that was just for regulating pressure (so I haven't messed with it . . . plus I have to "un-mount" it to try that option).

Any ideas?

Thanks, MarkR
__________________

Aluminumbskull with Led Balloon in Drag
***
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate
MarkR is offline   Reply With Quote
Old 11-20-2016, 01:28 PM   #3
Rivet Master
 
Lumatic's Avatar
 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 7,742
Images: 16
Blog Entries: 1
In my experience the most common cause is a drip in the system in the most inaccessible place possible.

Can also be caused by a leaking check valve.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 11-20-2016, 10:18 PM   #4
Rivet Master
 
MarkR's Avatar
 
1951 21' Flying Cloud
1960 24' Tradewind
Folsom , California
Join Date: Dec 2003
Posts: 727
Images: 12
Stupid Question:
Where's the possible "Leaking Check Valve"? In the pump or somewhere else in the system?

Thanks, MarkR
__________________

Aluminumbskull with Led Balloon in Drag
***
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate
MarkR is offline   Reply With Quote
Old 11-20-2016, 10:21 PM   #5
Rivet Master
 
MarkR's Avatar
 
1951 21' Flying Cloud
1960 24' Tradewind
Folsom , California
Join Date: Dec 2003
Posts: 727
Images: 12
Stupid Question No. 2:
wouldn't an air leak (if it was causing this) have to be somewhere in the piping on the incoming side of the pump?
__________________

Aluminumbskull with Led Balloon in Drag
***
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate
MarkR is offline   Reply With Quote
Old 11-21-2016, 07:28 AM   #6
Rivet Master
 
Lumatic's Avatar
 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 7,742
Images: 16
Blog Entries: 1
Quote:
Originally Posted by MarkR View Post
Stupid Question:
Where's the possible "Leaking Check Valve"? In the pump or somewhere else in the system?

Thanks, MarkR
Not sure about your model but it should be in the city water inlet line. It keeps back flow from flowing out the city water inlet.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 11-21-2016, 07:47 AM   #7
Rivet Master
 
Bigventure's Avatar
 
2016 30' Classic
Hinckley , Ohio
Join Date: Sep 2009
Posts: 907
Images: 4
I think the tank pick up it clogged with allege. It surges because it can't draw. Example is when you opened the antifreeze inlet it stoped. Use air to blow back to the tank then drain and sanitize.


Sent from my iPhone using Airstream Forums
__________________
My budget won't stop me from buying something online that I don't need, but the threat of getting promotional
emails every day for the rest of my life just might!
Bigventure is offline   Reply With Quote
Old 11-21-2016, 09:24 AM   #8
Home of Vortex tuning
 
CDONA's Avatar
 
2013 27' FB Eddie Bauer
Spearfish , South Dakota
Join Date: Dec 2009
Posts: 614
Images: 10
I read the install instructions for the one I have in a '13. It talks about water line inside diameter, no accumulator, and not to use elbows for they cause resistance to water flow. This back pressure is what will cause the pump to surge. My system has 4 elbows before it runs out of sight of my water pump, and more thru the system.
This surge is not from sucking air from the intake in the FW tank.
It is the wrong pump for my system.
__________________
"Chip Tank" is in Westwood Ca.
CDONA is offline   Reply With Quote
Reply


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
New Shurflo pump quit working? Lothlorian Water Heaters, Filters & Pumps 9 12-14-2008 06:08 AM
shurflo water pump, which one? urbanfood Fresh Water Systems 24 08-19-2007 04:37 PM
Fridg acting up ArtStream Refrigerators 8 09-21-2006 12:16 AM
Shurflo water pump urbanextreme Water Heaters, Filters & Pumps 13 05-18-2006 10:18 AM
Shurflo pump problems toastie Water Heaters, Filters & Pumps 14 05-17-2006 08:32 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

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 09:32 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.