Reply
 
Thread Tools Display Modes
Old 09-14-2016, 11:46 PM   #1
Junior Member
 
Join Date: Sep 2016
Posts: 9
Air in system... HELP!!

Hey guys, Canadian asking for help!!

I have a 2012 33ft Forest river. After the water system sits for 45minutes are more the entire system needs to be "re bled". After sitting for a hour or more, the waterpump will turn on and not shut off... just cycling air until I turn a tap on to let water through. I have just installed 2 brand new pumps, same issue with all 3 pumps. I installed a 1-way valve on the inlet of the water pump to help any "bleed off" issues. That did nothing...

Since water can not leave the pump and go back to the tank, it must be bleeding off after the waterpump? I dont understand how air is entering the system. Water tank is full, inside and outside showers are turned off. Its not the toilet... I am out of ideas!
__________________

__________________
afairs is offline   Reply With Quote
Old 09-15-2016, 12:36 AM   #2
Senior Member
 
Bluepill's Avatar
 
Join Date: Jun 2015
Location: Pensacola, FL
Posts: 662
I would look for leaks anywhere the plumbing runs. You could be damaging the structure if you have one. Follow the lines. The water heater area would be a possible leak area with the winterizing valves nearby.

If you find nothing obvious, you can pinch off the supply hoses to different runs (sections) and see if that stops the pressure drop.

Don't forget to check the TP relief valve on the water heater, as well as looking under the RV for any wet spots.

The constant vibration when driving an RV creates many more potential problems than a fixed installation like a home.
__________________

__________________
2015 T12RBST Flagstaff Hardside
2008 Itasca Meridian 37H
Bluepill is offline   Reply With Quote
Old 09-15-2016, 12:43 AM   #3
Junior Member
 
Join Date: Sep 2016
Posts: 9
No wet spots anywhere. Pinching off the lines sounds great but they plumbed my entire rv with those red and blue pvc lines, cant pinch them. And the winterize thing you are mentioning... I dont have access to behind my water-heater, it seems like they build the trailer around it! I'll dig in and take a better look tomorrow in the sunlight. Why would a rv hot water heater winterizing valve cause air? just a valve isnt it?
__________________
afairs is offline   Reply With Quote
Old 09-15-2016, 06:13 AM   #4
Senior Member
 
Witch Doctor's Avatar
 
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 7,162
The only place that is going to supply water to the pump is from your fresh water tank, either your sucking air from that line or from your over flow, depending on where your out let is cut into the tank. make sure that the strainer on the tank is tight, even use some plumbers tape on the treads, I f your on a 3rd pump and it is still doing the same thing it would have to between your fresh water tank and the pump.... put that up for you... PS what model FR 2012 do you own, there must be a access panel somewhere to get the valves to winterize you might as well find it now, that's why I ask only. There are three valves that are going to have to be turned hooked to that tank, unless it is tankless.
__________________
Rockwood #8289 WS 2012
F250 6.0 / Husky 16k
With 4 point leveling system
Witch Doctor is offline   Reply With Quote
Old 09-15-2016, 10:41 AM   #5
Junior Member
 
Join Date: Sep 2016
Posts: 9
2012 268 RLDS Coachman Chaparral. From my understanding this is a Forest river product since Coachman went bankrupt in 2008.
__________________
afairs is offline   Reply With Quote
Old 09-15-2016, 11:35 AM   #6
Head Rambler
 
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 3,481
You turn on the pump and it will not pump up pressure and shut off unless you bleed the air out of the system. Is that correct?

Once the system is up to pressure, you shut the pump off, and after a few minutes it has air in it again. Is that correct?

Once you bleed the air out of the system, what happens if you draw a glass of water? Does it have air bubbles in it?

About the only way air can get into the system while it's pressurized is if there's a leak on the suction side of the pump. If the system is fully depressurizing after you turn the pump off, you have a leak somewhere, and you really need to find it.

If you turn the pump off and turn it right back on does it immediately start running?

If you leave the pump switch on, how often does it cycle on and off automatically?
__________________
Salem 29RKSS Pushing a 2500 Mega-Cab CTD!
Gotta go campin!
Bama Rambler is offline   Reply With Quote
Old 09-15-2016, 12:36 PM   #7
Moderators' Assistant
 
bikendan's Avatar
 
Join Date: Jan 2007
Location: Camano Island, Washington
Posts: 11,211
Quote:
Originally Posted by afairs View Post
2012 268 RLDS Coachman Chaparral. From my understanding this is a Forest river product since Coachman went bankrupt in 2008.
Coachmen is a separate division of FR.
FR is the umbrella corporation so there is no actual FR brand RV.
I believe FR acquired Coachmen before it went bankrupt.
__________________
Dan-Retired Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC
bikendan is online now   Reply With Quote
Old 09-15-2016, 01:44 PM   #8
Junior Member
 
Join Date: Sep 2016
Posts: 9
Quote:
Originally Posted by Bama Rambler View Post
You turn on the pump and it will not pump up pressure and shut off unless you bleed the air out of the system. Is that correct?

Once the system is up to pressure, you shut the pump off, and after a few minutes it has air in it again. Is that correct?

Once you bleed the air out of the system, what happens if you draw a glass of water? Does it have air bubbles in it?

About the only way air can get into the system while it's pressurized is if there's a leak on the suction side of the pump. If the system is fully depressurizing after you turn the pump off, you have a leak somewhere, and you really need to find it.

If you turn the pump off and turn it right back on does it immediately start running?

If you leave the pump switch on, how often does it cycle on and off automatically?
Yes to everything except the bottom two questions. Once it has pressure, I can turn the switch on and off and the pump will stay off. But say after 10 minutes or so it will prime itself again. If I wait longer, it will just run and run and run.

If I leave the switch on, the pump will stay off once primed. But usually after an hour, it'll turn on and just stay running... Usually most pumps will cycle to build up pressure. All of mine will now have air and continually run.
__________________
afairs is offline   Reply With Quote
Old 09-15-2016, 02:36 PM   #9
Head Rambler
 
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 3,481
Once you turn the pump off, how long does it take before you can't get any water out of a faucet without turning the pump on?

If I'm correct, you have a small air leak in the suction side of the pump somewhere between the pump and fresh water tank. Once you find and fix that leak, you're problem will be fixed.

It may be a pinhole in a line or a leak at a fitting. Since that side is not under pressure, it's probably not leaking any water out.
__________________
Salem 29RKSS Pushing a 2500 Mega-Cab CTD!
Gotta go campin!
Bama Rambler is offline   Reply With Quote
Old 09-15-2016, 03:02 PM   #10
Newly Retired
 
Join Date: Jan 2016
Location: North GA
Posts: 93
Since you are familiar with your water pump and fittings, why not try to put a line on the suction side of the pump and drop the other end of the line in a bucket of water. If the problem goes away, then you know that you have a suction leak on that side of the pump.
__________________

__________________
Steveboe is offline   Reply With Quote
Reply

Thread Tools
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




» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 11:27 PM.