pipe size question

fufu · 01/09/2010, 10:11 PM

If a pump rate is 2000 gph at 0" head. If it has a 1.5" intake, and I reduce the outtake by splitting it to two 3/4" will the gph change drastically?

Chiefsurfer · 01/09/2010, 10:24 PM

it should drop quite a bit. a single 1.5 has a much larger volume than the 2 3/4" pieces. If splitting with little drop, you should go from 1-1.5" to 2-1" pipes. I do not have mathematical equations to give you off the top of my head, but what I suggested above should be ABOUT right.

drstupid · 01/09/2010, 11:42 PM

http://www.reefcentral.com/index.php...oss-calculator

fufu · 01/10/2010, 03:04 AM

Quote:

Originally Posted by drstupid

http://www.reefcentral.com/index.php...oss-calculator

Thanks, but it only calculate one size of pipe for both in and out.

PapaKlix · 01/10/2010, 08:16 AM

Quote:

Originally Posted by Chiefsurfer

it should drop quite a bit. a single 1.5 has a much larger volume than the 2 3/4" pieces. If splitting with little drop, you should go from 1-1.5" to 2-1" pipes. I do not have mathematical equations to give you off the top of my head, but what I suggested above should be ABOUT right.

pi r squared = area of a circle

2 @ 1" is about 6.3 in sq
1 @ 1.5" is about 7.1 in sq

much closer than 2 @ .75" (3.5 in sq)

Paco · 01/10/2010, 08:41 AM

Also use a Y-junction not a T if you can. A T will really hurt the flow.

fufu · 01/10/2010, 01:03 PM

wouldn't the pressure compensate for the diameter loss? the reason I can only use 3/4 is because I am using loc-line and they dont have a 1" size.

captsluggo · 01/10/2010, 01:35 PM

Using 4 - 3/4 loclines gets close.
BTW, pi r round, cornbread r square.

Captsluggo

01/09/2010, 10:11 PM	#1
fufu Registered Member Join Date: Mar 2009 Location: Houston Posts: 432	pipe size question If a pump rate is 2000 gph at 0" head. If it has a 1.5" intake, and I reduce the outtake by splitting it to two 3/4" will the gph change drastically?

01/09/2010, 11:42 PM	#3
drstupid Aquarist emeritus Join Date: Mar 2006 Location: Narberth, PA Posts: 760	http://www.reefcentral.com/index.php...oss-calculator __________________ i'm not a real doctor, i just play one on tv. Current Tank Info: http://www.reefcentral.com/forums/showthread.php?t=2429266

01/10/2010, 08:41 AM	#6
Paco Move Don Join Date: Sep 2008 Location: Miami, FL Posts: 1,210	Also use a Y-junction not a T if you can. A T will really hurt the flow. __________________ Fish are nitrate factories. Remove them and watch your nitrates come down. Current Tank Info: 120 mixed reef

01/09/2010, 10:24 PM	#2
Chiefsurfer Registered Member Join Date: Apr 2009 Location: Seaside Park, NJ Posts: 2,138	it should drop quite a bit. a single 1.5 has a much larger volume than the 2 3/4" pieces. If splitting with little drop, you should go from 1-1.5" to 2-1" pipes. I do not have mathematical equations to give you off the top of my head, but what I suggested above should be ABOUT right.

01/10/2010, 01:03 PM	#7
fufu Registered Member Join Date: Mar 2009 Location: Houston Posts: 432	wouldn't the pressure compensate for the diameter loss? the reason I can only use 3/4 is because I am using loc-line and they dont have a 1" size.

01/10/2010, 01:35 PM	#8
captsluggo Registered Member Join Date: May 2009 Posts: 76	Using 4 - 3/4 loclines gets close. BTW, pi r round, cornbread r square. Captsluggo