Bulkhead Size for Right Flow

[OCCFan023]

I am going to be purchasing a custom 90 but have been having a tough time deciding what size bulkheads to go with to have the best flow rate to and from the sump.

I am going to have a single overflow but both holes in the overflow will be for drainage to the sump... From the sump I am going to be having one mag pump (size still undetermined) split into two returns for each side of the tank. I am just not sure what size bulkheads to use. I was going to use 1 inch bulkheads on a 75 but decided to bump up to a 90 and now dcant decide what size bulkheads to use (1 in, 11/4 in, or 1 1/2 in)

any insight or help would be much appreciated.

(if it matters I was thinking of going with one durso standpipe and one straight overflow (just pvc cut open with a strainer about half the size of the durso)

 

[reefnetworth]

depends on inhabitants and set-up. FO/fowLR/reef. on the home page, there is a calculator about halfway down on the left. REEF-ON!!!

 

[OCCFan023]

its going to be a reef. The calc on the homepage is only for single tubes though this will be a double overflow to sump.

anyone have any 90 gallon plumbing setups?

 

[kgross]

It really depends on the flow rate you plan on pushing through your sump. If you are going for less than 1200 gph 2 one inch would be ok, if you want to push closer to 2000 gph, 2 1/14 or 1 1/2 bulkheads would be better. There is no best setup, because it really depends on what you are doing. If you have a closed loop you will need no flow through the sump for tank flow, so you can size the setup for the flowrate your skimmer needs, so what skimmer are you planning on using and how are you planning on connecting it to the system?

Kim

 

[OCCFan023]

I am going to be using an ev120 and the sump is a 38 gallon (36 x 12.5 x 18) I dont really want to push the overflow past 1200 gph for optimal surface skimming and I dont want to push the overflow to the brink for flood saftey. I guess Ill be looking for 900-1200 gph from the sump (thinking a mag 12 at 4 ft tank return [1130 gpg.)

However I gues 2 1 1/4 inch pipes would be best because this way I can use a ball valve to lower the rate but at the same time raise it in the future if needed..

any other suggestions/tips that you think would be useful on this subject?