bulkhead flow

[dwdenny]

I am going to drill my tank for the intake of a Reefflo dart which is 2". What I was wondering is one 2" bulkhead going to good? Any suggestions would be great if this is no good.

[dow]

Go here:Recommended Minimum Drain / Overflow Size Calculator (http://reefcentral.com/calc/drain.php)

Looks like the minimum drainpipe diameter for 2500 GPH is 2.06 inches, or another way to look at it is that a 2" diameter hole will allow passage of almost 2500 gallons per hour, if it's running at maximum. Does this help?

[dwdenny]

sure does did not even think of looking at reef centrals calculators boy do I feel like a dumb you know the rest.

[dow]

LOL, I only thought of it since I was there yesterday using the same calculator.

[dwdenny]

Thanks again that should do it the pump is rated at 3500gph at 0' head but I have estimated that I will have about 8' of head giving me about 2000-2300gph so that one 2" bulkhead should be plenty of flow to the pump if I am thinking correctly.

[duc]

I am not saying don't trust that site but, don't trust that site. I have two 1" drains and a 1000gph pump at 0 but I am running it at approx 4-4.5' head and I cannot run it wide open or it will overflow my tank. Not sure if I am doing something wrong or if the site is wrong but if my overflows cant keep up I am no sure how yours would.
Clif

[dwdenny]

this all on a closed loop manifold so the intake will be drilled and plumbed directly to the pump then out to the manifold. Sorry I should have made that clear at the beginning sorry about that. This might change some things not sure. Anyway sorry for the confusion.