proper placement of bulkhead

griffithimage · 02/22/2009, 05:55 PM

Hi, I'm about to drill the back of my tank and wasn't sure how far down from the top I should place my hole. It is a 1 inch bulkhead (with teeth in the front) that will serve as my drain into my sump.

billdogg · 02/22/2009, 06:05 PM

what size tank? a 1" drain will only flow about 300 - 350 gph safely, and that will leave you little or no margin for error. unless your tank is very small (20g), i would use a larger (preferably 2 larger) bulkhead.

as for where? as long as it is 1 hole diameter or more from any edge or other hole, wherever you like, but keep in mind that if it is to be a drain without standpipe, drilling lower than as close to the top as you can WILL result in an empty tank the first time the power fails.

griffithimage · 02/22/2009, 06:08 PM

the tank is 28 gallons

aquaman05 · 02/22/2009, 06:32 PM

I had the same question .

I have a 75 gallon im about to set up and didnt know what size or where to drill the tank.

My sump is gonna be 20 gal Long.

Im still lookinf for a answer, maybe someone can help us both

bishop82476 · 02/22/2009, 06:41 PM

it is really up to you where you put the bulk head some people like them on the back of the tank some prefer the bottom of the tank only thing with the bottom is you have to make sure it aint tempered (u cannot drill tempered glass) hope this helps

aquaman05 · 02/22/2009, 06:48 PM

I wanna drill mine on the back towards the top

02/22/2009, 05:55 PM	#1
griffithimage Registered Member Join Date: Sep 2007 Location: Markham, Ontario, Canada Posts: 266	proper placement of bulkhead Hi, I'm about to drill the back of my tank and wasn't sure how far down from the top I should place my hole. It is a 1 inch bulkhead (with teeth in the front) that will serve as my drain into my sump.

02/22/2009, 06:05 PM	#2
billdogg Registered Member Join Date: Apr 2008 Location: Grove City, Ohio Posts: 10,806	what size tank? a 1" drain will only flow about 300 - 350 gph safely, and that will leave you little or no margin for error. unless your tank is very small (20g), i would use a larger (preferably 2 larger) bulkhead. as for where? as long as it is 1 hole diameter or more from any edge or other hole, wherever you like, but keep in mind that if it is to be a drain without standpipe, drilling lower than as close to the top as you can WILL result in an empty tank the first time the power fails. __________________ I'll try to be nice if you try to be smarter! I can't help that I grow older, but you can't make me grow up! Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer

02/22/2009, 06:08 PM	#3
griffithimage Registered Member Join Date: Sep 2007 Location: Markham, Ontario, Canada Posts: 266	the tank is 28 gallons

02/22/2009, 06:32 PM	#4
aquaman05 Registered Member Join Date: Dec 2008 Location: indiana Posts: 722	I had the same question . I have a 75 gallon im about to set up and didnt know what size or where to drill the tank. My sump is gonna be 20 gal Long. Im still lookinf for a answer, maybe someone can help us both

02/22/2009, 06:41 PM	#5
bishop82476 Registered Member Join Date: Jul 2007 Posts: 41	it is really up to you where you put the bulk head some people like them on the back of the tank some prefer the bottom of the tank only thing with the bottom is you have to make sure it aint tempered (u cannot drill tempered glass) hope this helps

02/22/2009, 06:48 PM	#6
aquaman05 Registered Member Join Date: Dec 2008 Location: indiana Posts: 722	I wanna drill mine on the back towards the top