Need help planning a PVC overflow for my 125

Fozzybear

Fozzybear

wocka wocka wocka!
Mar 16, 2011
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Okay, so I officially have a 125...bought a 55 with it and the guy threw in a couple 29s and a 10 for free. So I've got a 29g sump and http://www.amazon.com/gp/product/B000256E76/ref=oh_details_o00_s00_i00 that pump for it (900 GPH), I've got the eco complete black sand, 2 jager 300w heaters and now I need to work up my overflow. So I've got the concept down and I've drawn out a plan with some numbers on it...that's where you guys come in. I need to figure out what size to make everything so...

tank
- 125 gal
- Dimensions :72 1/2" x 18 1/2" x 23 3/8"
pump
- 900 gph
sump
- 29 gal

Overflow plumbing.png


I would really appreciate it if some of you guys who've got experience in the big tank club could rough out some measurements and diameters with me.


Here is a rough idea of the sump. Time to actually turn everything on and put it together so any proofing you guys want to do would be great
SUmp.jpg

Overflow plumbing.png SUmp.jpg
 
I'd really rather not, Working with PVC isn't that hard and its conceptually fairly simple. here, it'll work like this.
PVCoverflow1.gif

PVCoverflow1.gif
 
They make several slp on the rim overflows. Why not just copy one that works instead of re-inventing the wheel?
 
It looks like something Travis (Fishfriend1) would think up.
 
this isn't a reinvention of the wheel, plans for this are all over the web, this is actually the go to DIY overflow as far as I can tell, and it should cost me more than 30-40 bucks. Again, I'm a commercial fisherman so I work with tons of PVC and this would be a breeze to put together and literally take minutes. All I need to know is what diameter of piping to use and how hard to neck it down at the spots I need to.
 
here look... please tell me how building this same thing out of PVC pipe is reinventing the wheel. I just don't want to mess with sheets of acrylic or risk popping a tank. I've got experience working with PVC, not glass.

Look at the water flow
lg-74884-57365-fish.jpg
They even have the same location for the bleed valve, please...
Overflow plumbing.png
Hydrodynamics are hydrodynamics whether they are in a rectangle or a cylinder. Please, this isn't a shot in the dark for ya'll to thumb noses at, either help me out with some ideas on diameters or go troll somebody else's thread.

lg-74884-57365-fish.jpg Overflow plumbing.png
 
thanks allot that's very helpful
 
So, 2" would give me a pressure loss of 7.21 PSI according to that. Does that seem about right?
 
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