eshopps overflow? Update

So one of my u tubes keeps getting air build up. It is not losing siphon but it slows to a trickle.

I am wondering what you guys think?

Here is what i am looking at.

 

could the tube have a crack or cut in it?

 

I have checked it several times and no leaks in the tube. I just pulled all the air out of it again and will see how long it takes to go to a trickle again.

 

It's a hair line crack, I've had it happen to me.

 

in all honesty id chunk that stuff and look into glasscutters. They make in tank overflows but it requires you to drill the back side of the tank. had a buddy order one for his 58 and its pretty damn nice.

Edit: sorry its glassholes. Dont know why I thought glasscutters lol

 

How is fast is your flow? If it's really slow, this will happen.

I would shirnk wrap those exposed wires though.

 

Wouldn't this break siphon all together?

 

If only it were that simple. I don't know how difficult it would be to do this with the tank up and running but I am sure it would be a HUGE undertaking.

If my next tank is not pre-drilled, I will definitely be drilling my own.

 

If it's hair line it will won't break completely. It drove me nuts so I ordered a new u tube and it was perfect. I could see the crack in the right light

 

Is the air coimng from the intake end?
Are you evacuating the air to start the siphon with a pice of 1/4: lind ran up thru one end and sucking the air out?

If it continues to get air in the U tube- BIG Trouble.
I hope you have a shut off for the DT getting too high of water level- or you will be mopping up water.

Sometimes adjusting the intake box hdight will help. Are the bubbles getting sucked in from the inside box?
I faster moving flow thru the tube will often suck the bubbles thru too.

And has as been said, you may have a hairline crack in the U tube.
Stay off the crack! ;-)

When I had my 125 running as my DT, I had my own, elaborate, intank surface skimming HOB siphon style overflow. It was made of PVC- and never had leaks of cracks. It's history now though with my current set up.