PVC flow rates

[NewAcreReef]

I'm setting up a 175 in the future and I'm looking for flow rates on different diameters of PVC. I can't seem to find this information anywhere..

I'm going to be building the beananimal style overflow and what I'm looking to get is information on what diameters will get me what flow rates, as well as what diameter I need to drill for bulkheads.

Last question is, what about the return pipe diameter? I've heard that your return pipe size should be half of what your inlet is.

I feel like a newbie here but I can't find solid information anywhere! Am I missing something obvious here?

If I posted in the wrong section I apologize but the newbie section didn't quite seem like the right place to ask.

 

[Mordir]

Drain Size capacity:
1/2" = 140
3/4 "= 330gph
1" = 590 gph
1-1/4 "= 900 gph
1-1/2 "= 1300 gph
2" = 2300 gph


Pressure pipe capacity:
1/2" = 300 gph
3/4" = 720 gph
1" = 1200 gph
1-1/4" = 1600 gph
1-1/2" = 2600 gph
2" = 4800 gph

 

[Mordir]

One thing to note on the overflow if you are not using a linear overflow the pipe sizes listed for drain capacity do not take into account the reduction in flow caused by strainers. Make sure you leave plenty of extra flow for the overflow otherwise the water will run over the top of your tank.

 

[billsreef]

It should also be noted those capacities do not account for head loss from things like elbows, etc. They are ideal maximum capacities.

 

[Tigé21v]

From Bean Animal's website.
http://www.beananimal.com/articles/hydraulics-for-the-aquarist.aspx

 

[NewAcreReef]

Thanks for that link, i'm looking into that right now. I understand that curves and bends affect the end pressure of the return pump, as well as height.

Does it affect it substantially? As in a couple hundred gph? Or is it marginal, as in 50 or so in a 4 foot line?

 

[PolyReef]

http://flexpvc.com/PVCPipeSize.shtml

 

[NewAcreReef]

I've looked into that and I've looked at flexible tubing, not the clear kind but what you would see on a pool pump.

 

[PolyReef]

I've looked into that and I've looked at flexible tubing, not the clear kind but what you would see on a pool pump.

http://flexpvc.com/WaterFlowBasedOnPipeSize.shtml

 

[glarior]

I did not read all the post but I have a 240g tank with 1.5" over flow and it is flowing two syncra 5 at 4ft head height. Each pump return is 1" tubing

On a 300g I have dual 1" over flow box and running 2 syncra 5's on it as well wtih 1" tubing on the pumps.

IMO, I would have two 1" drains. I regret not adding a 2nd return on the 240 tanks.