Plumbing Question?

[falco]

I am getting ready to start plumbing a new tank (Oceanic 180). I a going to be using a reeflo snapper for a return pump. The tank has 2 overflow boxes and each overflow box has 2 1" bulkheads. I was going to use all 4 1" bulkheads for drain into the sump. Now, I wanted to attach all 4 drains to a manifold then have 6 ball valves attached feeding all of my equipment separately. My question is: if the bulkhead drains are 1" should I make the manifold bigger? Having the 1" bulkheads drain into a 1 1/2" pipe?

Thanks,

Jack

 

[tmz]

Yes it shuld be bigger at least two inches . I run 5 one inch drains via a two inch mainifold. Why eactly would you want vavles on the drains? and why 6 valves for 4 drains?

 

[patmack]

I would go bigger than that. maybe 2" or 2 1/2".

 

[falco]

The valves would be on the manifold, not the drain itself. The reason for the valves would be so I can regulate the flow running to the refugium, skimmer, reactors

 

[FishTruck]

The cross sectional area of your 1 inch pipe is 3.14 sq inchs. So, for four of these roughly 12 sq inches.

A two inch pipe has a cross sectional area of about 12 square inches.

So, you should use two inches as a minimum and 2.5 would be safer.

Does that sound right?

 

[falco]

FishTruck- Yes. Thank you for the explanation.

 

[tedu]

I think there's a problem with your math.
Area of a circle = pi *r * r
1" pipe has a radius of 1/2 inch, so the cross sectional area = ~ .78 sq in.
2" pipe has a radius of 1 inch so the cross sectional area = ~ 3.14 sq in.

So the conclusion is still valid as the 2" pipe has a cross sectional area roughly 4x that of 1" pipe.