please explain this.

[JaxsBr]

the green in the pic is where the water level wil be when the power goes out and no more water is returned to the tank.
Blue arrows are inlet and outlet.
what is the vent tube for.



I went through some threads trying to understand how the syphon is restarted, but just cant get it.

All i could guess is that it has something to do with the air pressure between the green.

 

[The1and only]

watch the animation towards the bottom of the sticky

http://www.monsterfishkeepers.com/forums/showthread.php?t=219465

 

[cypher1024]

Hey bud,
the water level will actually look like this when the power is off:

The water keeps overflowing into the system until the water level reaches the same level as the inlet.

Then the system has to equalise, so the intake pipe drains until the water level reaches the outlet pipe.

The top loop stays primed all the time and when the system restarts, water starts flowing in the intake, pushing water over the top loop and out the outlet.

The vent tube is what makes the system restartable. Without it, the system would just be a syphon, and would have to be restarted manually after the power goes off (or any time it sucks air in).

 

[gtgg]

question; revised, what is the valve hook up to ?

 

[JaxsBr]

thanx guys.the animation made i work for me.

 

[cypher1024]

question; revised, what is the valve hook up to ?

If you're talking about the check valve, it has to be attached to the top loop of the system (you can see it in the pictures in this thread). It lets you prime the system by drawing all of the air in the top loop out so that it's filled with water.

 

[rallysman]

If you're talking about the check valve, it has to be attached to the top loop of the system (you can see it in the pictures in this thread). It lets you prime the system by drawing all of the air in the top loop out so that it's filled with water.

This, and you can hook an aqualifter to it for added peace of mind.