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Old 12-13-2003, 01:18 AM   #1
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The Z-Flow, $7.50 pvc no hassle overflow

well... i did some experimenting and came up with this design for an EXTREEMLY cheap and EASY overflow that handls about 600 gph. THe last image attached below is the whole unit stretched out so you can see how things are linked together. The other two are to show you how it looks before it'll be attached to the tank.

I felt this design keeps the whole process very simple, it's easy to put a sponge in the bottom to keep things from clogging, initial setup is a BREEZE, simply dunk the whole unit into the water and tip to let the air out, tip it up right and remove from the water, voila, the siphon is primed and the unit is ready to roll!!

The only modifications I want to make to this is to the collection cup. I want to run it across the table saw a few times and give it some teeth (a dremel will work for this as well) and I also plan on grinding out a small ridge in the bottom of the female portion of the cup to allow the cup to slide easily up and down to adjust tank water level. Notice the built in Durso Stand pipe.. this unit functions nearly silently.

Parts:
3" PVC female to female joint (collection cup)
3" to 1-1/2" PVC Adapter (bottom of collection cup)
1-1/2" to 1" pvc Adapter (reduce bottom to 1" pipe... you could stay at 1-1/2" if you'd like, give a larger GPH)
1" PVC elbows (7)
1" PVC "T" (1)
1" PVC End cap (1)
1" barbed tubing connector
about 3' of 1" PVC Pipe (lots of 2" pieces hehe)

[edit] trying to re-upload images[/edit]
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Old 12-13-2003, 01:28 AM   #2
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Awesome! Will it self prime if the water level drops below then rises again? Looks like it should. Took some tater' power to rig that up.
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Old 12-13-2003, 01:32 AM   #3
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yea, It deffinitely keeps the siphon primed. if you're going to build one, you have to be sure the bottom of the horizontal part of the T is below the water line of your tank or you'll be in trouble
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Old 12-13-2003, 01:38 AM   #4
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neat!

that's some impressive pvc work ... amazing that a simple zig zag is all that's needed to maintain the siphon

how does it look in the tank?
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Old 12-13-2003, 01:41 AM   #5
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I was definately thinking looks as an issue, but for a for a well planted (in your case DIY) fresh, or even a frag tank it would be an awesome and CHEAP method.
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Old 12-13-2003, 02:22 PM   #6
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Nice.I bookmarked the plan for future considerations.I have 3 tanks that I want to eventually tie together with a manifold system of some hind. 8)
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Old 12-13-2003, 11:31 PM   #7
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can i just not see the picture or did the server change kill it?
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Old 12-14-2003, 07:58 PM   #8
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well thats interesting... when I first came to the topic I saw the pictures... i was going to post but realized I wasn't logged in... i log in.. now I don't see the pics anymore...

thanks for the comments! This idea just kinda struck me while I was at work one day. The only part of the unit that is in the tank is the collection cup and the first "up run" of the PVC. It only takes up about a 4-5" square int he corner of the tank... I think it doesn't look too bad at all.
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Old 12-14-2003, 08:03 PM   #9
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so did you post pics of how it looks in your tank?.. I think you just started a DIY fever! Just in time too, considering I am thinking of making a refugium/sump! Oh yeah, what pump do you use it with? I have a rio 1400 laying around and was thinking of using it as a sump pump for my 45G tall
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Old 12-14-2003, 10:03 PM   #10
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no I didn't want to post up a pic if there's issues with pics. I'll post one up once the site's DNS has stghtened out. I don't have this in my display tank just yet, Its in my soon to be 55 fuge. I wanted to build it and experiment before I move my tank (gotta finish my DIY stand before that happens, and that probably wont happen till after winter) I tested this with a Mag 9.5 and the overflow lost hehe but from what others have told me a 1" pipe should handle up to 600 GPH so as long as your pump is under 600 GPH you should be ok. You could also make the same thing as above with 1-1/2" pipe and get a bit more GPH (anyone know what that should be?)
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