Question on Bean over flow and pipe size

[burtonboy182]

I was reading through the bean animal over flow thread. I see he went from 1” bulk head to a 1.5” bulk head. I was wondering if this really makes any difference or would sticking with 1” throughout be the same thing? The bulkhead is the limiting factor as far as flow.

 

[dbl]

I moved this over to the equipment forum for a better response. It may help if you tell us a little about the tank you're designing/putting together. Size of the tank, any existing bulkheads you're working with, etc.

 

[User1]

I was reading through the bean animal over flow thread. I see he went from 1” bulk head to a 1.5” bulk head. I was wondering if this really makes any difference or would sticking with 1” throughout be the same thing? The bulkhead is the limiting factor as far as flow.

I believe if you read the reason behind it it was due to space. At least that is what I remember. I don't know if the plumbing below the bulk head changes it or not but you may be correct. I can say that my bulk head fittings on the overflow are also 1.5" but due to space inside the overflow box I also had to go down to 1" inside the overflow. So exactly matches what he did but was not my intent. Just how it worked out. I can say it moves more than enough water and I have it dialed down due to the return pump I'm using which is a Cor 15.

 

[Ocelaris]

http://www.beananimal.com/articles/hydraulics-for-the-aquarist.aspx

1" could flow up to 1700 gph, but likely you'll see less with restrictions. It mostly depends on your pumps as most of us won't hit the theoretical limit. For a larger tank (>200 gallons) a 1.5" makes sense. Imo.

 

[ca1ore]

The size of the drain piping is entirely dependent upon the amount of water you plan to put through it. The weir is a limiting factor here as well. A 1" siphon will move plenty of water, but a stand pipe/emergency much less.