Van has been fine to date and having fun. Last night when connected to mains pressure water the tank filler started to leak. Obviously the tank had back filled somehow and was overflowing.
Thinking a faulty non return valve maybe between the 12 v pump and the pressure pipes?
Van has two fresh water tanks plumbed to a12v pump and a seperate pressure water connection They connect at a tee on the outlet of the 12 v pump
Any clues?
Dougwe said
06:09 AM Jun 29, 2017
Before I changed it, Dale, I filled tanks by connecting a hose to inlet, mains water the same fitting. There was a tap like fitting next to inlet that I had to turn. One way filled tanks the other way was for mains water. They are seperate now.
KevinC said
08:18 AM Jun 29, 2017
Your 12v pump has a non return valve which has failed. The fix is either replace the whole pump (expensive and only good until next time) or purchase a separate non return valve and fit it between the pump and the tank(s). This is a low cost and very effective fix.
You could fit the new valve on the pressure side of the pump, the jury is still out on this so it would amount to your own personal preference.
Bagmaker said
02:27 PM Jun 29, 2017
does the water still flow as it should if the pump is used? (disconnected mains)
OutbackMK said
02:44 PM Jun 29, 2017
Check if there is a pressure regulator at the pump outlet, mine was set too low and water flowed back through the pump and into the water tank.
My390 said
08:57 PM Jun 29, 2017
Thanks for the advice so far
The pump works normally with the mains disconnecteD so that seems ok.
No pressure regulator on the outlet of the pump.
Best option seems to be to fit a one way check valve or non return valve on the pump inlet rather than buy a pump. As I am on the road plumbing in a new tap arrangement will have to wait for now.
Currently on NSW coast near Merimbula heading north so will track down a caravan or plumbing supplies to see what I can get.
Thanks everyone for your advice
Cheers Dale
PeterD said
03:22 PM Jul 2, 2017
KevinC wrote:
Your 12v pump has a non return valve which has failed. The fix is either replace the whole pump (expensive and only good until next time) or purchase a separate non return valve and fit it between the pump and the tank(s). This is a low cost and very effective fix. You could fit the new valve on the pressure side of the pump, the jury is still out on this so it would amount to your own personal preference.
The jury is not out at all. If you fit the non return valve between the pump and the tank then the pumps valves will still be carrying most of the back pressure. See the following
Yes Peter, We've all seen those diagrams. But logic tells us that the only reason we fit the extra valve is because the one in the pump has failed. That means it doesn't work any more, or in layman's terms it no longer exists. So without a valve in the pump, if we put the new valve between the pump and the tank, the pump will always be seeing pressure, and it will never cycle. We can leave it switched on and be able to read the Drifter to see the status of our system, and the pump will never run. However, put the new valve before the pump and the pump will be in a state of no pressure, which means that if we check the state of our tanks for any reason, the pump will immediately start to run. And it will only stop if we turn off the switch. So in my situation, since I have 3 fresh tanks and a grey, I choose to have my system active all the time and have a constant check on what's going on. For you, you can choose to do whatever you wish, depending on how you use your tanks, pump and monitors.
But as I said, the jury is still out, meaning, there is no right or wrong, you just do what suits you best.
Thank you for your input.
My390 said
09:09 PM Jul 31, 2017
Hi All. Just an update on this one
I bought a 1/2 inch one way valve for $9.95 ano cut it into the line between the water tanks and the pump.
Problem solved and a cheap fix. Thanks very much for the advice
Van has been fine to date and having fun. Last night when connected to mains pressure water the tank filler started to leak. Obviously the tank had back filled somehow and was overflowing.
Thinking a faulty non return valve maybe between the 12 v pump and the pressure pipes?
Van has two fresh water tanks plumbed to a12v pump and a seperate pressure water connection They connect at a tee on the outlet of the 12 v pump
Any clues?
You could fit the new valve on the pressure side of the pump, the jury is still out on this so it would amount to your own personal preference.
Thanks for the advice so far
The pump works normally with the mains disconnecteD so that seems ok.
No pressure regulator on the outlet of the pump.
Best option seems to be to fit a one way check valve or non return valve on the pump inlet rather than buy a pump. As I am on the road plumbing in a new tap arrangement will have to wait for now.
Currently on NSW coast near Merimbula heading north so will track down a caravan or plumbing supplies to see what I can get.
Thanks everyone for your advice
Cheers Dale
The jury is not out at all. If you fit the non return valve between the pump and the tank then the pumps valves will still be carrying most of the back pressure. See the following
Design your RV or Caravan plumbing system
Scroll to the bottom to see the last diagram.
But as I said, the jury is still out, meaning, there is no right or wrong, you just do what suits you best.
Thank you for your input.
Hi All. Just an update on this one
I bought a 1/2 inch one way valve for $9.95 ano cut it into the line between the water tanks and the pump.
Problem solved and a cheap fix. Thanks very much for the advice
Regards
Dale