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Aquarium Bulkhead Tests

Bonus content from the July 2009 FAMA magazine article Go With the Flow.

By Mike Kirkman and Scott Vallembois

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Freshwater and Marine Aquarium Bonus Content
Results:
These results demonstrate that a:
2 inch bulkhead will flow approximately 1350 GPH
1 1/2 inch bulkhead will flow approximately 975 GPH
1 inch bulkhead will flow approximately 350 GPH 
3/4  inch bulkhead will flow approximately 165 GPH

Bulkhead Test Data

Bulkhead Size (Inches) Time (Seconds) Flow (gph) Notes
2 133 1353
2 132 1364
2 122 1475 A siphon effect occurred for a portion of the trial
2 133 1353
2 130 1385
2 143 1259 Plumbed with 5 foot horizontal run
2 142 1269 Plumbed with 5 foot horizontal run
2 139 1295 Plumbed with 5 foot horizontal run
2 142 1268 Plumbed with 5 foot horizontal run
2 171 1052 Plumbed with 5 foot horizontal run & intake strainer
2 169 1065 Plumbed with 5 foot horizontal run & intake strainer
2 175 1029 Plumbed with 5 foot horizontal run & intake strainer
2 171 1052 Plumbed with 5 foot horizontal run & intake strainer
1 1/2 184 978
1 1/2 184 978
1 1/2 187 963
1 1/2 182 989
1 1/2 215 837 Plumbed with 5 foot horizontal run
1 1/2 213 845 Plumbed with 5 foot horizontal run
1 1/2 215 837 Plumbed with 5 foot horizontal run
1 1/2 217 829 Plumbed with 5 foot horizontal run
1 1/2 259 695 Plumbed with 5 foot horizontal run & intake strainer
1 1/2 245 734 Plumbed with 5 foot horizontal run & intake strainer
1 1/2 255 705 Plumbed with 5 foot horizontal run & intake strainer
1 1/2 247 729 Plumbed with 5 foot horizontal run & intake strainer
1 188 957 A siphon effect occurred for the entire trial 
1 535 336
1 489 368
1 371 485 A siphon effect occurred for a portion of the trial 
1 475 379
1 500 360
1 515 350
1 562 320
1 567 317
1 564 319
1 557 323
1 1120 159 Plumbed with 5 foot horizontal run & intake strainer
1 1051 171 Plumbed with 5 foot horizontal run & intake strainer
1 1110 162 Plumbed with 5 foot horizontal run & intake strainer
1 1102 163 Plumbed with 5 foot horizontal run & intake strainer
3/4 489 368 A siphon effect occurred for a portion of the trial 
3/4 1084 166
3/4 368 489 A siphon effect occurred for the entire trial 
3/4 1094 165
3/4 1094 165

Want to read the full story? Pick up the July 2009 issue of Freshwater And Marine Aquarium, or subscribe to get 12 months of articles just like this.

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