freakaccident Posted February 6, 2003 Share Posted February 6, 2003 Source = http://www.eparc.com/diy/overflows/williar.../overflow.shtml Link to comment
wetworx101 Posted February 7, 2003 Share Posted February 7, 2003 Actually, I have a simpler setup I made after I saw this guys post. http://www.nd.edu/~lego/grp2/www/reef_diy.htm I will have a digicam this weekend, so i will take pictures since I modified mine heavily for a 20H nano. Mine can be built in 2 minutes too. Link to comment
wetworx101 Posted February 7, 2003 Share Posted February 7, 2003 Here is a diagram. It is all 1" PVC, with 2" PVC for the intake. The intake is about 4" high. It has a threaded cap at the end. I used a 1/4" drill bit to drill the caps for the 1" and 2" pipes. Then I used a 1/4" nylon 2" bolt and nut, with a washer, to attach the two caps so the 1" PVC will cap inside the 2" PVC cap. Then I drilled the 2" PVC with multiple 1/4" holes near the top for surface straining. Then I drilled 1/2" holes in the 1" cap while the pipe was in it. This is how the water gets into the first "U". The rest is just 1" PVC, although I opted to put a barbed adapter at the end of it for hose to the sump. Make sure that the second overflow level's elbow,1, is kept at a level between point 2 and 3. This will keep the water flowing, if the water slows down, the level in the initial skimmer wont go so low that the syphon breaks. All from the local Home Depot. Link to comment
edying Posted February 7, 2003 Share Posted February 7, 2003 Here my DIY. you can play with the dimensions and use different pipe if you want to try and get a better flow. I have mine with a 10G sump/refugium with a maxijet1200 for the return (about 3' head). Not sure about the actual flow, but mine right now is limited by the holes I have drilled that allow water to enter the inside box. I could probably do slots from the top to improve flow a bit. A few notes... I used vinyl tubing for the U tube because it was easy - I used some plastic pipe hanger to ensure that it doesn't flatten. I also cut the ends at angles so that I won't block the tube when it gets to the endcap... -Ed Link to comment
kimura Posted February 7, 2003 Share Posted February 7, 2003 edying , that's a pretty cool design. I was contemplating on using pvc pipes and the vinyl tubing. But I just dont need it anymore. But if you do have it up, can you post a pic? Link to comment
freakaccident Posted February 7, 2003 Author Share Posted February 7, 2003 I think I will use your design edying. I have all the parts already and it will be easy to do. Thanks, Aaron Link to comment
Cami Posted February 9, 2003 Share Posted February 9, 2003 edying , I'm assuming that the tubing is just slipped into the pipes and not mounted or cemented. I like your design and will use it also, if you don't mind. How hard was it to start the syphon? Cami Link to comment
edying Posted February 10, 2003 Share Posted February 10, 2003 Hiya folks - Yes, the vinyl is just stuck in there. Siphon is actually pretty easy to start... I have a ball valve on my output. I just closed it up, filled both the inner and outer PVC with tank water. Put the tank side vinyl all the way down. Put an airline on the other side and put the vinyl so that it was just submerged. Sucked out the water from the tube, pulled the airline out and then pushed the vinyl the rest of the way down. Opened up the ball valve and away we went... With the Maxijet 1200, the flow through the vinyl tubing is pretty good - no bubbles build up in it at all. I'll try and get some pics of it in action when I get the chance... -Ed Link to comment
wetworx101 Posted February 10, 2003 Share Posted February 10, 2003 something I didnt draw into my design, but added later on, was a hole large enough to cement a rigid airline connector, a short piece of airline, and a valve. (I used a plastic needle valve, but I imagine a one way check valve would do the same.) All i do is suck on the airline...and close the valve. If you use rigid PVC to make the siphon, this can be a real convenience. Even better yet, one could attach the air intake from a venturi adapter, like on a powerhead, to insure the siphon always was working. Link to comment
freakaccident Posted February 10, 2003 Author Share Posted February 10, 2003 I made the overflow using smaller tubing to conserve space but it didn't work very well. I drilled the tank instead. Easy to cut the hole and works great. Link to comment
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