Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 08-16-2005, 04:44 PM   #1
Senior Member
 
chasfm11's Avatar
 
Texas Boomers Club
Freightliner Owners Club
Join Date: Mar 2004
Location: DFW Area, TX
Posts: 2,027
When switching from city water to use our fresh tank with the pump, the pump will run but not pump water. I read through past forum posts, especially those about the water tank fill valve being open and carefully checked for that condition. While it is possible that there is a bad seat on the water tank fill valve, I made sure that it felt tight. I'd also seen information about a checkvalve but haven't been able to locate that in our system.

I was successful at getting the water to flow by opening the outside shower valves. After a few seconds, I got a trickle of water and then heard the pump increase in noise volume and got a good surge of water. Once this happens, the pump will work faithfully until I hook up the hose and city water again.

Is this a checkvalve problem and, if so, what does the checkvalve physically look like? Is it possible that it is just a bad seat washer inside the fresh water tank fill valve? Are there other possibilities?

Thanks,

Charlie
__________________

__________________
2000 Georgie Boy Landau 36' DP
2005 Saturn Vue toad
KF5-NJY
chasfm11 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-16-2005, 04:44 PM   #2
Senior Member
 
chasfm11's Avatar
 
Texas Boomers Club
Freightliner Owners Club
Join Date: Mar 2004
Location: DFW Area, TX
Posts: 2,027
When switching from city water to use our fresh tank with the pump, the pump will run but not pump water. I read through past forum posts, especially those about the water tank fill valve being open and carefully checked for that condition. While it is possible that there is a bad seat on the water tank fill valve, I made sure that it felt tight. I'd also seen information about a checkvalve but haven't been able to locate that in our system.

I was successful at getting the water to flow by opening the outside shower valves. After a few seconds, I got a trickle of water and then heard the pump increase in noise volume and got a good surge of water. Once this happens, the pump will work faithfully until I hook up the hose and city water again.

Is this a checkvalve problem and, if so, what does the checkvalve physically look like? Is it possible that it is just a bad seat washer inside the fresh water tank fill valve? Are there other possibilities?

Thanks,

Charlie
__________________

__________________
2000 Georgie Boy Landau 36' DP
2005 Saturn Vue toad
KF5-NJY
chasfm11 is offline   Reply With Quote
Old 08-16-2005, 09:24 PM   #3
Guest
 
Posts: n/a
...air locked....need better flow by lowering part of the water supply hose to pump to keep from air building up....makes me crazy too....but I fixed mine by getting rid of the pump and going to compressed air system.....no more problems.....geofkaye
__________________
  Reply With Quote
Old 08-16-2005, 09:33 PM   #4
iRV2 Marketing
 
DriVer's Avatar
 
Winnebago Owners Club
Workhorse Chassis Owner
Coastal Campers
Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,304
Blog Entries: 70
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by chasfm11:
Are there other possibilities? </div></BLOCKQUOTE>Charlie, Just thinking here but how'z your inlet screen? I found that mine was pretty dirty (brown film) and I would be suspect that if may have occluded the flow to my pump.

Screen is clean now and the pump seems to run better.
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
DriVer is offline   Reply With Quote
Old 08-17-2005, 12:57 AM   #5
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
If the pump is running but not pumping look to the inlet side of the pump. If it is not running there could be a pressure airlocked and you need to look on the discharge side of the pump. It may be that the pressure switch on the pump itself is starting to fail. The check valve should be a the inlet of city water, another at the water heater and you could have one at the discharge side of pump before city inlet connects to system. Good luck and let us know what you find.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 09-07-2005, 01:21 PM   #6
Senior Member
 
chasfm11's Avatar
 
Texas Boomers Club
Freightliner Owners Club
Join Date: Mar 2004
Location: DFW Area, TX
Posts: 2,027
Here is a update.
1. The pump always runs. When it is in the failing condition, it just doesn't pump water.
2. There is no check valve on the back size of the hose inlet. There is just a joint to connect that fitting to the rest of the system.
3. Once the pump operates correctly, it continues to do so over many days and being turned off and on at the switch panel.
4. When it fails, it is always after I disconnect from city water. The last two times, I've been successful at getting it to start pumping by opening the outside shower. I discovered this by accident when the cleanout water was not available at a dump station. After the water starts at the outside shower, I must still let one of the inside faucets run for a minute or two while it spits and air comes out with little water. When the water start flowing and the pump is running with the heavier "pumping" noise, the flow is good and the pump shuts off and restarts with the faucet.

I suspect this is somehow operator error for the way that I'm disconnecting. Any thoughts would be appreciated.
__________________
2000 Georgie Boy Landau 36' DP
2005 Saturn Vue toad
KF5-NJY
chasfm11 is offline   Reply With Quote
Old 09-07-2005, 04:55 PM   #7
Senior Member
 
Kirk's Avatar
 
Join Date: Jan 2000
Location: Livingston, Tx., US
Posts: 162
It sounds as though you are somehow getting an air lock in the system. Since the outside shower is probably near the city water connection it may be that your air is somehow comming from it. I would try using a hose plug screwed into the water connection to prevent any air entry into the system to see if that will help.
__________________
Good travelin! ......Kirk
URL: www.1tree.net/adventure/
Kirk is offline   Reply With Quote
Old 09-08-2005, 05:17 AM   #8
Senior Member
 
chasfm11's Avatar
 
Texas Boomers Club
Freightliner Owners Club
Join Date: Mar 2004
Location: DFW Area, TX
Posts: 2,027
Thanks for your suggestion, Kirk. I think that I tried to do exactly what you suggested but without good results. I have a "Y" connector that I always use to attach my hose to the spigot. When I disconnect, I shut off the "Y" connector valve for my hose before shutting off the water at the spigot and then disconnecting from the spigot, trapping the water and pressure inside of the hose. I simply coil the hose up in the compartment and close the door. I would have thought that this would prevent any air in my system but apparently not.

I have also tried relieving the pressure in the hose but not draining it. The results were the same. The outside shower is near the hose input and is much lower than the rest of the system. I thought initially that I might somehow be sucking air in via that shower but have not been able to prove to myselt that that is what is happening. I have no water leaks anyplace before disconnecting the city water hose so I'm assuming that there is no place to suck in air. I have a whole house water pressure regulator and sediment filter in the hose line and have checked them both for leaks as well.

Charlie
__________________
2000 Georgie Boy Landau 36' DP
2005 Saturn Vue toad
KF5-NJY
chasfm11 is offline   Reply With Quote
Old 09-08-2005, 06:18 AM   #9
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,085
The city water inlet check valve is usually part of the inlet fixture itself, not a separate component. To replace it, you probably have to replace the inlet (not expensive and usually easy enough to do).

Your symptoms sound like an airlock, though. The pump cannot build up pressure nor can it move water past the air bubble, so it runs and runs. The outside shower is often the lowpoint drain in the system, so opening it flushes the line and releases the air bubble. Another faucet would probably do as well but would take a whole lot longer.

When you connect an empty hose and then turn on the site's water spigot, you push a hose full of air into the Rv system. My guess is that some of that air is being trapped against the pump outlet. Try opening the valve that fills the tank before connecting the city water hose (that let's any air push into the fresh water tank, where it is vented). See if that eliminates the problem later when you disconnect and switch to pump. You really shouldn't have to do that, but it would help pinpoint the problem. There may be a low (or high) spot in the tubing that is trapping enough air to cause the trouble, Re-routing the line can solve it, if that is it.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 09-08-2005, 10:53 AM   #10
Senior Member
 
chasfm11's Avatar
 
Texas Boomers Club
Freightliner Owners Club
Join Date: Mar 2004
Location: DFW Area, TX
Posts: 2,027
Gary, first, thanks for your reply and second - Right on! I was assuming that the problem was created during the disconnection process. It wasn't. The hose (or when I needed more length - hoses) full of air were somehow being driven into the system at connection time in such a way as to prevent the pump from sucking water out of the tank. I still don't understand why this is true but it is. I could replicate the failure at will today or make it go away by disconnecting the water hose at the RV end and filling it with water (driving out the air) before re-connecting it. The switch over to pump was almost instantaneous after disconnecting/shutting off the city water.

I would have thought that all of the air in the hose would have been discarded through the first faucet turned on inside after connection. Now I know that it isn't and can make sure that take proper steps to prevent the air pocket.

Thanks again.

Charlie
__________________

__________________
2000 Georgie Boy Landau 36' DP
2005 Saturn Vue toad
KF5-NJY
chasfm11 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
Water Pump Problem BobD MH-General Discussions & Problems 4 06-04-2008 06:01 PM
Water pump problem Overlander MH-General Discussions & Problems 4 04-21-2008 06:04 PM
Water Pump/Pressue Problem GaDawgFan Winnebago Industries Owner's Forum 16 09-26-2007 09:15 PM
shurflo water pump problem Stubborn Newmar Owner's Forum 8 03-30-2007 05:48 AM
shurflo water pump problem MH-General Discussions & Problems 8 12-31-1969 07:00 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:31 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.