Help! Auto topoff siphoning problem

[TonyQ]

My problem is I have a MaxiJet600 hooked up to my auto top off. When the float switch turns the pump off a siphon is created and keeps on pumping. The MJ is sitting at the bottom of a ten-gallon reservoir and I know a check valve will not help my problem because it keeps the flow from coming back up. I do have an air gap at the end of the tube so I am left thinking how to fix this problem. Any ideas will help thanks.

[TonyQ]

bump

[baotchi]

I had the same problem and I didn't know how to adress it... In the end It would've worked but your top-off reservoir would need to be lower than the sump (if you have a sump and are toping it off). I ended up using something else to achieve my top-off, and I like it much better than a pump. I used a push-valve and a selenoid like I saw a guy do here in the DIY forum I think. I don't have the link handy but search about selenoid and you'll get it.

Simon

[TonyQ]

Yep it is going to my sump but there is noway to move the reservoir. I've read about push-valve and a selenoid but I was looking at a cheap way to fix the problem.Nothing in this hobby is cheap so I guess I just have to do it. Thanks

[Nikkoli110]

EDIT - oops didn't read the last post

[baotchi]

TonyQ : Just make the tube do a higher loop before going down to the sump... it should break the siphon.

Simon

[bertoni]

I just have the water drop a short distance from the supply line into the tank. I'm using a peristaltic pump, though, so that might make a difference.

[baotchi]

Of course it does... this kind of pump can not cause a siphon, even if you wanted it to do so...

Simon

[TonyQ]

I fix the problem and all it cost me was 56 cents so am pretty happy all it took was a tee and some tubing. Thanks guys for the ideas.

http://i23.photobucket.com/albums/b373/TonyQA/tankpics003.jpg

http://i23.photobucket.com/albums/b373/TonyQA/tankpics002.jpg

http://i23.photobucket.com/albums/b373/TonyQA/tankpics001.jpg

[baotchi]

Niiice!!! :D

Simon