Need help with overflow box

[texmex]

I have this overflow box, I am new to these. It's an Eshop dual overflow. Will this lose syphon if power goes out? My power goes out alot and can not have that happen. I bought this for 20 bucks, hope it is worth it. It's going on a 125 that I am setting up. Can anyone tell me exactly how these work and how do I get the water to start flowing in this? Any help would be great. Thanks.

[ErikH]

stick a piece of flexible airline tubing into the U shaped tube. Fill both sides with water, and make sure that the part inside the tank is full of water. Suck the air out of the tube, and make sure there is no air in it. Small bubbles are ok, you just don't want a large bubble of air in there. It should not lose siphon if you lose power. The only time I have had an incident was when I was messing with it! :) Have some towels handy...

[texmex]

thanks I was mind boggled on that.

[mikedelgado]

have the tank drilled.

[Bill S]

It should work fine - keep an eye on it, sometimes - well, usually - the bubbles in the tubes grow over time. Suck the air out of them occasionally.

[texmex]

have the tank drilled.

hey mike do you know anyone near by that can drill it for me?

[coraline79]

I have the single version of that overflow, and it has never lost siphon in almost a year. You will be disappointed with the noise, and it will gain an air bubbles in the top of the U tubes every 2 weekes or so. I have a drilled tank I am moving everything to.

[mikedelgado]

If you get a diamond bit you can drill it yourself. Or maybe brian at kingfish could do it.

[MKCindy]

I have a single version too. I have a hole drilled on the inside part of the U tube so it will stop siphon in a power failure. If the power goes out, my return pump will go out too. I don't want to flood your refuge either. With a little time, you can figure out how much water your tank can hold if the power comes back on (restarting the return pump)and your over flow doesn't. I have a small black piece of tape on my refuge to show me the maximum fill level to avoid flooding.
If noise is an issue, add a filter sock or fiber filter where the water enters the sump/refuge. (the kind depends on your set up)

[texmex]

I have a single version too. I have a hole drilled on the inside part of the U tube so it will stop siphon in a power failure. If the power goes out, my return pump will go out too. I don't want to flood your refuge either. With a little time, you can figure out how much water your tank can hold if the power comes back on (restarting the return pump)and your over flow doesn't. I have a small black piece of tape on my refuge to show me the maximum fill level to avoid flooding.
If noise is an issue, add a filter sock or fiber filter where the water enters the sump/refuge. (the kind depends on your set up)

how do you get your pump to stay off?

[MKCindy]

It doesn't, when the electricity comes back on, it will too. I have a dividing wall part way up my refuge before the return pump chamber. This prevents the pump from draining my refuge more than about 1/3 down. My understanding is the Mag will turn off if it runs dry for very long. I don't know if that will result in damage, but it won't flood my house. I guess the theory is it is cheaper to replace a pump than carpet and/or floors.