overflow bulkhead size question

[mrpet]

i have 2 external overflows on a 375 gal tank overflow sizes are
18" long 14" high and 6" deep i want to run 4 drains 2 in ea
overflow one drain will tee into my rc500 skimmer what size
bulkheads should i use for the drains? was thinking 2" rtrn pump
is a barracuda.... thanks

 

[mrpet]

someone please?

 

[daytonians]

OK, 375 tank. It depends on how much flow you want. I like to run about 20X flow. That works out ot 7500 GPH if my math is correct.

7500 divided into 4 drains would be 1875 GPH per drain. According to the drain calculator on here, you would need 1.78" drain lines. So go with 2" and you should be fine.

 

[mrpet]

thanks matt thats what i needed to know

scott