bulk head=flow rate ?

[cubsfan]

Is there some where I can find how much a bulk head will flow?
I do know it also has to do with the pipe size. Just trying to do some research. thanks for any help

 

[sign guy]

there are alot of varibles
size
is it a return or siphon
and what size tank

 

[cubsfan]

it will be a siphon at the bottom of tank, durso style. on a 224 gallon tank.
i read someones post that a 1" bulkhead will flow about 6-700 gph and 2 (1 1/2) will flow about 1800gph. does this sound correct?
I need about 2240 gph for a fowlr
Thanks

 

[squidd]

While it can be done...You may want to reconsider running all your flow thru sump...
More effecient to size flow to operate skimmer and fuge efectively...and flow at a rate the sump can handle without micro/bubble/surging/flooding "issues"...
The "rest" of the flow for the main tank can be made up with supplemental devices...closed loop, powerheads, Tunze, or wave makers....

 

[cubsfan]

That makes sense, thanks squidd.
do you think that 2 one inch drains will be enough for a 90 gall sump/fuge?
it will have a s.skimmer 220.
The rest I can set up in a closed loop.

 

[squidd]

More than likely....
2x1" will give 1200 to 1400 or so..
You want about 1 1/2 X skimmer pump rating for skimmer side turnover the rest to fuge...
Fuge will probably "box out" at 30 gallons or so ...
so a 500 gph skimmer gets 700-750 gph...rest to fuge...500-600 in a 30 is 17X to 20X turn over...
If you "need" a high turn over fuge... get a bigger return pump and "T" (divert) the additional flow back to fuge (for "tumble action")..
Rest of MT flow can be made up with supplemental devices...

 

[cubsfan]

let me make sure i got this then.
i will still need to return the 12-1400 gal coming from the main tank - correct?
Tank will be about 5 feet off ground. So i will need a mag 24 pump ( flow at 6' will be 1700 ) mag18 at only 1150. then put a t in to divert rest of flow back to fuge if needed. I know I will also lose some flow with elbows.
thanks again for your time.

 

[squidd]

Yep 24 or bigger depending on how fast you need the fuge to be...
(I think 20X is plenty)

 

[bojik]

On the bulkhead topic will a 1/2" bulkhead handle a =<150 gph gravity return ?
On the whole turn over rate (sorry to shanghai the thread a bit) does the turn over rate for the tank system need to be taking place in the DT or can a lot of it be in the sump/fuge system attached to it? That is one thing that has me a little unsure.