Drain hole size flow rates?

Ira · 09/07/2012, 08:03 PM

Can anyone link me to somewhere that has drain hole size flow rates? I am going to be building a 60-70 gal tank this fall with a bean-animal style drain and want to make sure I dont undersize the holes.

Thanks,

Ira

bnumair · 09/07/2012, 08:15 PM

Assume Gravity to Low Pressure. About 6f/s flow velocity, also suction side of pump Assume Average Pressure. (20-100PSI) About 12f/s flow velocity Assume "High Pressure" PEAK flow. About 18f/s flow velocity*
Sch 40 Pipe Size ID
(range) OD GPM
(with minimal pressure loss & noise) GPH
(with minimal pressure loss & noise) GPM
(with minimal pressure loss & noise) GPH
(with minimal pressure loss & noise) GPM
(with significant pressure loss & noise) GPH
(with significant pressure loss & noise)
1/2" .50-.60" .85" 7 gpm 420 gph 14 gpm 840 gph 21 gpm 1,260 gph
3/4" .75-.85" 1.06" 11 gpm 660 gph 23 gpm 1,410 gph 36 gpm 2,160 gph
1" 1.00-1.03" 1.33" 16 gpm 960 gph 37 gpm 2,220 gph 58 gpm 3,510 gph
1.25" 1.25-1.36" 1.67" 25 gpm 1,500 gph 62 gpm 3,750 gph 100 gpm 5,940 gph
1.5" 1.50-1.60" 1.90" 35 gpm 2100 gph 81 gpm 4,830 gph 126 gpm 7,560 gph
2" 1.95-2.05" 2.38" 55 gpm 3300 gph 127 gpm 7,650 gph 200 gpm 12,000 gph
2.5" 2.35-2.45" 2.89" 80 gpm 4800 gph 190 gpm 11,400 gph 300 gpm 17,550 gph
3" 2.90-3.05" 3.50" 140 gpm 8400 gph 273 gpm 16,350 gph 425 gpm 25,650 gph
4" 3.85-3.95" 4.50" 240 gpm 14,400 gph 480 gpm 28,800 gph 700 gpm 42,000 gph
5" 4.95-5.05" 5.563" 380 gpm 22,800 gph 750 gpm 45,000 gph 1100 gpm 66,000 gph
6" 5.85-5.95" 6.61" 550 gpm 33,000 gph 1100 gpm 66,000 gph 1700 gpm 102,000 gph
8" 7.96" 8.625" 950 gpm 57,000 gph 1900 gpm 114,000 gph 2800 gpm 168,000 gph

bnumair · 09/07/2012, 08:17 PM

that didnt come out as clear as i wanted. here is the link for the website.
http://flexpvc.com/WaterFlowBasedOnPipeSize.shtml

cobra9 · 09/07/2012, 08:18 PM

Roughly

3/4" - 300 gph
1" - 600 to 700 max
1.5" - 1400 to 1600 max

For drains.

karimwassef · 09/12/2012, 12:11 AM

http://www.beananimal.com/articles/h...-aquarist.aspx

enter the pipe diameter and difference in height... gives you the gph

09/07/2012, 08:03 PM	#1
Ira Registered Member Join Date: Mar 2012 Posts: 135	Drain hole size flow rates? Can anyone link me to somewhere that has drain hole size flow rates? I am going to be building a 60-70 gal tank this fall with a bean-animal style drain and want to make sure I dont undersize the holes. Thanks, Ira

09/07/2012, 08:15 PM	#2
bnumair Dr. Reef at ur service Join Date: May 2009 Location: Tulsa, Ok, USA Posts: 7,751 Blog Entries: 15	Assume Gravity to Low Pressure. About 6f/s flow velocity, also suction side of pump Assume Average Pressure. (20-100PSI) About 12f/s flow velocity Assume "High Pressure" PEAK flow. About 18f/s flow velocity* Sch 40 Pipe Size ID (range) OD GPM (with minimal pressure loss & noise) GPH (with minimal pressure loss & noise) GPM (with minimal pressure loss & noise) GPH (with minimal pressure loss & noise) GPM (with significant pressure loss & noise) GPH (with significant pressure loss & noise) 1/2" .50-.60" .85" 7 gpm 420 gph 14 gpm 840 gph 21 gpm 1,260 gph 3/4" .75-.85" 1.06" 11 gpm 660 gph 23 gpm 1,410 gph 36 gpm 2,160 gph 1" 1.00-1.03" 1.33" 16 gpm 960 gph 37 gpm 2,220 gph 58 gpm 3,510 gph 1.25" 1.25-1.36" 1.67" 25 gpm 1,500 gph 62 gpm 3,750 gph 100 gpm 5,940 gph 1.5" 1.50-1.60" 1.90" 35 gpm 2100 gph 81 gpm 4,830 gph 126 gpm 7,560 gph 2" 1.95-2.05" 2.38" 55 gpm 3300 gph 127 gpm 7,650 gph 200 gpm 12,000 gph 2.5" 2.35-2.45" 2.89" 80 gpm 4800 gph 190 gpm 11,400 gph 300 gpm 17,550 gph 3" 2.90-3.05" 3.50" 140 gpm 8400 gph 273 gpm 16,350 gph 425 gpm 25,650 gph 4" 3.85-3.95" 4.50" 240 gpm 14,400 gph 480 gpm 28,800 gph 700 gpm 42,000 gph 5" 4.95-5.05" 5.563" 380 gpm 22,800 gph 750 gpm 45,000 gph 1100 gpm 66,000 gph 6" 5.85-5.95" 6.61" 550 gpm 33,000 gph 1100 gpm 66,000 gph 1700 gpm 102,000 gph 8" 7.96" 8.625" 950 gpm 57,000 gph 1900 gpm 114,000 gph 2800 gpm 168,000 gph __________________ Water Quality: NO3 0,Phos 0,Cal 440,Alk 7.5,Mag 1300 "Reef Fast, You Crash, Reef Slow, You Pass" Mike's Reef 3:16 Current Tank Info: 350g DT,95g sump, 50g Frag tank, 4800gph return 4x Sea swirls. 6x AI Vega Color. 200# Pukani rock, dual recirculating skimmer, Biopellet, GFO Carbon rx's, Cal rx. Closed loop. 1.5hp chiller, genesis renew. Apex & RKE

09/07/2012, 08:17 PM	#3
bnumair Dr. Reef at ur service Join Date: May 2009 Location: Tulsa, Ok, USA Posts: 7,751 Blog Entries: 15	that didnt come out as clear as i wanted. here is the link for the website. http://flexpvc.com/WaterFlowBasedOnPipeSize.shtml __________________ Water Quality: NO3 0,Phos 0,Cal 440,Alk 7.5,Mag 1300 "Reef Fast, You Crash, Reef Slow, You Pass" Mike's Reef 3:16 Current Tank Info: 350g DT,95g sump, 50g Frag tank, 4800gph return 4x Sea swirls. 6x AI Vega Color. 200# Pukani rock, dual recirculating skimmer, Biopellet, GFO Carbon rx's, Cal rx. Closed loop. 1.5hp chiller, genesis renew. Apex & RKE

09/07/2012, 08:18 PM	#4
cobra9 Registered Member Join Date: May 2010 Posts: 700	Roughly 3/4" - 300 gph 1" - 600 to 700 max 1.5" - 1400 to 1600 max For drains.

09/12/2012, 12:11 AM	#5
karimwassef Registered Member Join Date: May 2004 Location: Dallas, TX Posts: 11,033	http://www.beananimal.com/articles/h...-aquarist.aspx enter the pipe diameter and difference in height... gives you the gph