CL Drain Hole size??

bdare · 09/22/2007, 02:26 PM

Hello,

I need help. I'm putting in a CL with a pump rated around 1200 gph. The inlet on the pump is 1". What size drain do I need on the tank? Also, I'm worried about critters being sucked in. What can I use other than a regular strainer to keep them out? Will the standard strainer work?

Thanks in advance!
Ben

SDguy · 09/22/2007, 02:32 PM

I use a 1.5" drain with a standard strainer on my Hammerhead closed loop pump. No issues. I've never had a fish get "stuck" . I've even seen my tangs eating off the strainer, albeit carefully

IMO all those stories I've read about (usually tangs) getting stuck on strainers have been due to unhealthy fish.

bdare · 09/22/2007, 03:56 PM

So on a 40 BDR with 1200 gph through the drain should I put in a 1.5" drain or am I OK with a 1" drain because that is the size of the pump intake?

SDguy · 09/22/2007, 05:16 PM

1" is fine. I have 5800 gph +/- on 1.5"

bdare · 09/22/2007, 06:10 PM

Ok,

One more question... Right now at any one time that 1200 gph (before head loss) will be split between 2 returns. I have them slated for 3/4. Is that too big? I'm wondering of approx 550 gph coming through a 3/4" return will give me enough flow. Again, this is a 4 bdr.

Thanks,

Ben

SDguy · 09/22/2007, 07:45 PM

You should be fine. I have about that coming out of each of my 3/4" outlets, running down the full height of my tank 31".

bdare · 09/24/2007, 07:51 AM

Anyone else?

09/22/2007, 02:26 PM	#1
bdare Salty Dude Join Date: Feb 2006 Location: Rockwall, TX Posts: 1,322 Blog Entries: 3	CL Drain Hole size?? Hello, I need help. I'm putting in a CL with a pump rated around 1200 gph. The inlet on the pump is 1". What size drain do I need on the tank? Also, I'm worried about critters being sucked in. What can I use other than a regular strainer to keep them out? Will the standard strainer work? Thanks in advance! Ben

09/22/2007, 02:32 PM	#2
SDguy Fish heads unite! Join Date: Mar 2003 Location: San Diego Posts: 23,384	I use a 1.5" drain with a standard strainer on my Hammerhead closed loop pump. No issues. I've never had a fish get "stuck" . I've even seen my tangs eating off the strainer, albeit carefully IMO all those stories I've read about (usually tangs) getting stuck on strainers have been due to unhealthy fish. __________________ Peter SDMAS member Marine tanks since 1989. ><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º> ·´¯`·.¸. , . .·´¯`·.. ><((((º> Current Tank Info: 240g butterfly and angel FOWLR. 15g QT.

09/22/2007, 03:56 PM	#3
bdare Salty Dude Join Date: Feb 2006 Location: Rockwall, TX Posts: 1,322 Blog Entries: 3	So on a 40 BDR with 1200 gph through the drain should I put in a 1.5" drain or am I OK with a 1" drain because that is the size of the pump intake? __________________ 220 Mixed Reef GeoCaRx, GHL Profilux 4, Octopus Skimmer, Kessil 360X 2 x Maxspect Gyre XF350

09/22/2007, 05:16 PM	#4
SDguy Fish heads unite! Join Date: Mar 2003 Location: San Diego Posts: 23,384	1" is fine. I have 5800 gph +/- on 1.5" __________________ Peter SDMAS member Marine tanks since 1989. ><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º> ·´¯`·.¸. , . .·´¯`·.. ><((((º> Current Tank Info: 240g butterfly and angel FOWLR. 15g QT.

09/22/2007, 06:10 PM	#5
bdare Salty Dude Join Date: Feb 2006 Location: Rockwall, TX Posts: 1,322 Blog Entries: 3	Ok, One more question... Right now at any one time that 1200 gph (before head loss) will be split between 2 returns. I have them slated for 3/4. Is that too big? I'm wondering of approx 550 gph coming through a 3/4" return will give me enough flow. Again, this is a 4 bdr. Thanks, Ben __________________ 220 Mixed Reef GeoCaRx, GHL Profilux 4, Octopus Skimmer, Kessil 360X 2 x Maxspect Gyre XF350

09/22/2007, 07:45 PM	#6
SDguy Fish heads unite! Join Date: Mar 2003 Location: San Diego Posts: 23,384	You should be fine. I have about that coming out of each of my 3/4" outlets, running down the full height of my tank 31". __________________ Peter SDMAS member Marine tanks since 1989. ><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º> ·´¯`·.¸. , . .·´¯`·.. ><((((º> Current Tank Info: 240g butterfly and angel FOWLR. 15g QT.

09/24/2007, 07:51 AM	#7
bdare Salty Dude Join Date: Feb 2006 Location: Rockwall, TX Posts: 1,322 Blog Entries: 3	Anyone else? __________________ 220 Mixed Reef GeoCaRx, GHL Profilux 4, Octopus Skimmer, Kessil 360X 2 x Maxspect Gyre XF350