The black tubing I'm pointing to is my anti-siphon tube. I can adjust how high up in the rez it is by pulling up on the blue feed line. Simple, effective, and it hasn't ever let me down in 4 years of use

[Hammerhead]

I use 3 check valve's on my Aquarium works just fine when the power goes out...I have never balanced anything. Installed powered off the pump(2500gph) no Siphon.. These are the ones I have. I did not look at the one I posted just searched check valve..The drilling off holes works as well I have some on my overflow tubes.


https://www.marinedepot.com/True_Unio...FTVLTC-vi.html

[rives]

Originally Posted by Hammerhead

I use 3 check valve's on my Aquarium works just fine when the power goes out...I have never balanced anything. Installed powered off the pump(2500gph) no Siphon.. The drilling off holes works as well I have some on my overflow tubes

What kind of a circuit are you talking about, HH? A check valve works great in a situation where you want to eliminate the possibility of a flow reversal, but if the flow continues the same direction from siphoning, the only way that I it working is if the check is closed by spring tension greater than the weight of the column of water.

[Hammerhead]

?? Not sure what you mean.. I have them right now. there used 24/7 360 days a year.. The pump is below the tank if the power goes out the water will siphon back from the pump line. The check valve does not have a spring in it. It is hinged at the top called a flapper check valve



When water attempts to go backwards through the valve the flapper closes and prevents the water from going through the valve

[rives]

Originally Posted by Hammerhead

?? Not sure what you mean.. I have them right now. there used 24/7 360 days a year.. The pump is below the tank if the power goes out the water will siphon back from the pump line. The check valve does not have a spring in it. It is hinged at the top called a flapper check valve

In your application, what you are trying to stop is the water reversing flow - if the power goes off, the pump shuts off and create a siphon, dragging the water backwards through the pump. Perfect application for a check valve. In the OP's case, his reservoir is higher than the discharge point, and the siphon effect will keep the water flowing the same direction that the pump had been moving it. Even if there were a check valve, it wouldn't have an opportunity to close - the water just keeps going the same way the pump was moving it.

[Hammerhead]

ah ya the rez needs to be lower to use them.. Just driil some holes then .. I missed that part my rez is lower then my plants but I hand water.. I would have the rez lower then the table.. I have never seen a rez higher then the table.. Maybe he has no table and the plants are on the floor? Drill a few hole should fix that

[Benvanboro]

So if my water level is lower than my octa bubblers at all times this won't happen?
Sorry, I just set up my first drip system 2 weeks ago, and am only reading about this siphon effect the past 2 days. I have not experienced it at all. My bubblers are almost 1ft above the highest water level, and the pots themselves are a few inches lower then that.

Originally Posted by rives

In your application, what you are trying to stop is the water reversing flow - if the power goes off, the pump shuts off and create a siphon, dragging the water backwards through the pump. Perfect application for a check valve. In the OP's case, his reservoir is higher than the discharge point, and the siphon effect will keep the water flowing the same direction that the pump had been moving it. Even if there were a check valve, it wouldn't have an opportunity to close - the water just keeps going the same way the pump was moving it.