Our caravan has now decided to fill the water tanks unsolicited. Connected to mains water, I noticed water overflowing from the filler caps. Checked the gauge and both tanks were full. Last time I checked they were 1/4 full. Drained the tanks using the drain tap and closed it. Shortly thereafter the tanks were beginning to fill again. Not knowing much about the plumbing, can anyone shed some light as to why this is happening and is there a quick fix. Currently the drain taps are open and water is visibly running out. Cheers, Larry
DMaxer said
11:20 AM Mar 3, 2016
It might be a job for a priest.
jules47 said
11:24 AM Mar 3, 2016
My first thought was maybe you have left the pump on?
graeme c said
11:26 AM Mar 3, 2016
Had the same problem with our Avan frances, under warranty the 12v pump was replaced due to a faulty 1 way valve, this solved the problem
Graeme
deverall11 said
11:47 AM Mar 3, 2016
jules47 wrote:
My first thought was maybe you have left the pump on?
Why would I use the pump when connected to mains?
Thanks for the thought
Geeco said
11:49 AM Mar 3, 2016
Generally the water connection on the side of your van is plumbed into the system down stream from the pump. This is done to keep the tank water separate from the hose supply. Then you can have good drinking water in the tank and other water from the local supply separated. On the down stream side of the onboard pump there is a non return valve if that is not functioning correctly water will flow into you tank. That is most likely where your problem is located.
Cheers,
leestevo said
03:03 PM Mar 3, 2016
We had the same problem with our new Jayco Silverline van...water was filling the tanks by itself. We took it to Jayco, they could not see the problem. So my husband inserted a one way directional valve after the pump and that fixed the problem. No more mains water filling the tanks now.
Dav4Cris said
04:25 PM Mar 3, 2016
Yep sounds like the one way valve needs cleaning or replacing. Usually a metal valve in the line can be a plastic one. Some van don't have them and it's the pump that stops the water.
OutbackMK said
06:18 PM Mar 3, 2016
There should be a valve (on my jayco it is next to the water pump) mine is adjustable diaphragm type it stops the water flowing back though the lines that feed the pump when using mains water pressure.
Eventually mine was overflowing out the breather vent above the tank filling points and flooding the area around the van, tighten the valve down a bit and no problems.
JohnR said
10:05 PM Mar 3, 2016
We had similar issues with our 2013 Jayco Outback Sterling. As with Jayco's policy they replaced the pump which corrected the problem. In recent times we have had (when pump on) water flowing out the intake valve. Jayco advised that a non-return valve should be inserted between the intake valve and the pump. Again this issue corrected. The non return valves's are products of John Guest and cost about $20-. You can fit it yourself or have caravan repairer do the task for you.
JohnR
PeterD said
12:10 AM Mar 4, 2016
First of all, go to this page. Scroll down to the bottom figure. This will give you an idea of how your plumbing should be (except perhaps for the in line taps in the tanks.) You will see a couple of non-return valves above the pump. Some manufacturers do not install one of those after the pump. That means that the pump will be operating as the non-return valve. If so it can receive higher pressure from the mains water supply than from normal pump operation. This will bugger the pump and water flow back to the tanks.
If that non-return valve is missing then get someone to install one for you.
Rocco said
09:41 PM Mar 5, 2016
We had this problem with a Jayco Silverline .There is a nonreturn valve in the line from the tap inlet which prevents water going into the tanks from the hose inlet (quality Chinese equipment) get a john guest non return valve and fit between the hose inlet and line to the tanks. About $25 and 10 minutes
PeterD said
10:16 PM Mar 5, 2016
Rocco wrote:
We had this problem with a Jayco Silverline .There is a nonreturn valve in the line from the tap inlet which prevents water going into the tanks from the hose inlet
Actually that non-return valve prevents the pump from pumping tank water out the town water inlet.
Our caravan has now decided to fill the water tanks unsolicited. Connected to mains water, I noticed water overflowing from the filler caps. Checked the gauge and both tanks were full. Last time I checked they were 1/4 full. Drained the tanks using the drain tap and closed it. Shortly thereafter the tanks were beginning to fill again. Not knowing much about the plumbing, can anyone shed some light as to why this is happening and is there a quick fix. Currently the drain taps are open and water is visibly running out.
Cheers,
Larry
It might be a job for a priest.
Had the same problem with our Avan frances, under warranty the 12v pump was replaced due to a faulty 1 way valve, this solved the problem
Graeme
Why would I use the pump when connected to mains?
Thanks for the thought
Cheers,
Eventually mine was overflowing out the breather vent above the tank filling points and flooding the area around the van, tighten the valve down a bit and no problems.
We had similar issues with our 2013 Jayco Outback Sterling. As with Jayco's policy they replaced the pump which corrected the problem. In recent times we have had (when pump on) water flowing out the intake valve. Jayco advised that a non-return valve should be inserted between the intake valve and the pump. Again this issue corrected. The non return valves's are products of John Guest and cost about $20-. You can fit it yourself or have caravan repairer do the task for you.
JohnR
First of all, go to this page. Scroll down to the bottom figure. This will give you an idea of how your plumbing should be (except perhaps for the in line taps in the tanks.) You will see a couple of non-return valves above the pump. Some manufacturers do not install one of those after the pump. That means that the pump will be operating as the non-return valve. If so it can receive higher pressure from the mains water supply than from normal pump operation. This will bugger the pump and water flow back to the tanks.
If that non-return valve is missing then get someone to install one for you.
We had this problem with a Jayco Silverline .There is a nonreturn valve in the line from the tap inlet which prevents water going into the tanks from the hose inlet (quality Chinese equipment) get a john guest non return valve and fit between the hose inlet and line to the tanks. About $25 and 10 minutes
Actually that non-return valve prevents the pump from pumping tank water out the town water inlet.