overflow bulkhead size question

mrpet · 02/21/2007, 07:39 PM

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 · 02/21/2007, 08:10 PM

someone please?

daytonians · 02/21/2007, 10:28 PM

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 · 02/22/2007, 01:26 AM

thanks matt thats what i needed to know

scott

02/21/2007, 07:39 PM	#1
mrpet Registered Member Join Date: Feb 2003 Location: ca Posts: 981	overflow bulkhead size question 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 __________________ "FREEEEEEEEDOM" Current Tank Info: 375 in wall with 180 sump

02/21/2007, 08:10 PM	#2
mrpet Registered Member Join Date: Feb 2003 Location: ca Posts: 981	someone please? __________________ "FREEEEEEEEDOM" Current Tank Info: 375 in wall with 180 sump

02/21/2007, 10:28 PM	#3
daytonians Registered Member Join Date: Jun 2003 Location: Cincinnati, Ohio Posts: 394	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. __________________ Thanks, Matt I'ld rather be in Daytona! Avatar: Photo taken with model Asia Williams posing on my car. Current Tank Info: 45 Gallon, LR, power head, custom hood with 140 watts PC light & 175 MH, basement has 29 g. fuge with 6" sand & caluerpa, 20 g. cryptic fuge with 4 inch sand bed & LR, carbon & Phos remover, 55 gallon sump.

02/22/2007, 01:26 AM	#4
mrpet Registered Member Join Date: Feb 2003 Location: ca Posts: 981	thanks matt thats what i needed to know scott __________________ "FREEEEEEEEDOM" Current Tank Info: 375 in wall with 180 sump