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Old 09-09-2005, 10:02 PM   #1
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PVC overflow assembly

Ok, I made this assembly from 1" PVC, with a 2" inlet strainer. According to calculations I got elswhere, it should have been able to take around 600 GPH. I'm actually getting around 90 GPH. Any ideas what went wrong?

P.S. Concept drawing attached now too.
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File Type: jpg overflowassembly.jpg (18.1 KB, 784 views)
File Type: jpg overflow_concept_diagram.jpg (5.2 KB, 756 views)
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Old 09-09-2005, 10:06 PM   #2
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could you give us a picture from the other side? is there a hole in he plumbing on the 5th elbow?
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Old 09-09-2005, 10:25 PM   #3
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You can just barely see on the first picture in the back left the T that is the siphon break. There is no other leak/opening.

Here's a couple more views from my crummy camera.
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File Type: jpg overflow_view_2.jpg (11.8 KB, 716 views)
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Old 09-09-2005, 10:27 PM   #4
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I just knew I should have built it from threaded parts...
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Old 09-09-2005, 10:31 PM   #5
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I seem to thing that all those 180 degree turns have a poor effect on those designs.. but there are some other members that have worked on these.. Hope you can get some help.. From what Ive read there has been some trouble working with these..

the only issue I can think of is all the turns and that maybe the syphon break isnt at the exact level to keep flow as high as it could be.. sorry I cant be more help on this one..
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Old 09-09-2005, 10:37 PM   #6
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It's only $13 worth of parts, as opposed to the $80 for the professional one. Even if I have to try again it's worth it, and I've learned something too.

Next one is made from threaded parts, so I can add in more length to the pipes when necessary.

At least the temporary filter is holding the ammonia and nitrites at 0. (Bucket of gravel, lift tube, air pump. Looks mighty unsightly in my aquarium.)
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Old 09-10-2005, 06:27 PM   #7
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links to discussion threads on this type of project....
http://www.aquariumadvice.com/viewtopic.php?t=13892
http://www.aquariumadvice.com/viewtopic.php?t=21243
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