Overflow standpipe help

[ElectricBlueSeanBurch]

My 220 is drilled on one end only. The overflow box has 1 3/4" and 2 1/2" bulkheads. Weird layout, I know. I currently use the 3/4" for my drain. I use the mega overflow adjustable standpipe. I am using one 1/2" for the return and I have the other one plugged. I am running a mag 9.5 for a return pump. My question is, if I made durso's for both the 1/2" bulkheads,. And left the one on my 3/4" bulkhead, how many gph could I run? If this was your tank, how would you set it up. If I used all the bulkheads for drains I could run the new pump through a spray bar. Any help guys?

 

[ElectricBlueSeanBurch]

The main reason I am asking this is because I am upgrading my sump. My drain easily handles my pump and my python filling my tank at the same time. I'm hoping for 1800 gph(ish).

 

[ElectricBlueSeanBurch]

Bump

 

[chagoi]

My 180 has 2 drilled holes on each side. A 1" drain on each side & a 3/4 return on each side. 1800 mag drive works fine.

 

[ElectricBlueSeanBurch]

My 180 has 2 drilled holes on each side. A 1" drain on each side & a 3/4 return on each side. 1800 mag drive works fine.

Thanks for the reply! However it doesn't really help me out

I guess maybe if I make my question more specific I might get some replies...
If I have a 1" durso standpipe, and 2 (two) 1/2" durso standpipes in one (1) overflow box what is the maximum gph I could get to drain through them?

 

[ElectricBlueSeanBurch]

 

[creepyoldguy]

Here's a simple solution. Herbie method! You've got 3 holes, which is perfect of this type setup. Use the 3/4" hole for your main drain, one 1/2" for your emergency drain and your other will be your return. Big time water flow 0 noise!

 

[Firebird]

size _GPM __GPH
1/2 = 2.50 = 150
3/4 = 5.63 = 337.5
1.0 = 10.0 = 600
1.25=15.6 = 937.5
1.5 = 22.5 = 1350
2.0 = 40.0 = 2400

Chompers says these are the flow rates for the given size pipes. Added up, looks like 637.5 max GPH using all three as drains.

 

[ElectricBlueSeanBurch]

Here's a simple solution. Herbie method! You've got 3 holes, which is perfect of this type setup. Use the 3/4" hole for your main drain, one 1/2" for your emergency drain and your other will be your return. Big time water flow 0 noise!

I've heard of this, but I had never setup an overflow/sump system before so I took the easy way out when I set this up 2 years ago. I guess I will start doing research on the herbie setup. Just a quick question, what gph do you think I could get if I did the herbie setup?

 

[creepyoldguy]

The herbie method is very simple and efficient. I'm not 100% sure on flow rate, but I had this sane type setup on my 300g and ran a 1200gph pump and my valve was almost closed.