5074 valve

[Ektor1]

Hi,

Have bought and installed the 5074 dispenser kit, but the valve does not do his job, and let all the kalk go to the water reserve.
I have tried near every position for the valve : up to the bottle, with a loop, etc it does not change the problem, the valve is not enough strong to avoid any return.

As the kit is completly new, it cannot be a 'corrosive' effect, or something else.

I have read several other post with the same problem, you say that the valve is not the system which must stop the siphon, I do not understand what else can do it ?

The pump take the water from the reserve, pump it to the bottle, which go to the tank.
Between the bottle and the reserve there is only one tube, with the valve, no air to stop any flow, so what can stop the siphon excepted the valve?
the pump is in the water, the bottle is full of water, and so the tube between both, water everywhere, and the reserve is of course lower than the bottle, so a siphon must happen, whatever the position of the valve.

I'm a bit disappointed by Tunze, I have accepted to pay a lot for this kit, a lot because it's only a bottle with really few things, I could have done it by myself for few dollars, and the only part which is important : the valve, is a cheap one.

I would be pleased to have an advice from you, I'm confident in your cie.

Regards

 

[rvitko]

The tube should go to the aquarium and stop above the water level so it cannot back siphon. The tube that supplies the water from the pump should be zip tied to the top of the reactor- to the tube going out. Unfortunately there are no perfect check valves for this small diameter of tubing, the rubber ones become hard over time and the spring versions are not perfect. I will take a photo of my calcium dispenser set up tonight and post it.

 

[Ektor1]

maybe if I put 2 valves, serial, it will reduce the problem.
Or maybe I will look for a solenoid to be sure.

 

[rvitko]

I don't think such an elaborate solution is necessary. Just be sure to zip tie the hose in above the bottle and make sure the hose does not touch the surface of the water in the tank. I have had better results with the check valve on the output and that is where I put mine. A rubber duckbill check valve (for airline) works better but does tend to harden and fail in time. I really have no backflow but I do use the older rubber check valve that used to be included.

 

[Ektor1]

the hose does not touch the water in the tank, it's several inches up to it. the valve is tied, upside to the bottle.
Do not work.
The spring must not be enough strong.

 

[rvitko]

I can mail you a rubber duckbill check valve if you PM me an address.