Will Flow rate distribute evenly in this manifold?

[rpgraff]

I have been looking at using Rob B’z Kalkwasser dosing Venturi and it occurred to me this might also be how I could remote dose other liquids to my display tank from a fish room 25-30 feet. If the water flow from the pump is split 4 ways to different Venturi’s, then another manifold combines them together, would the flow rate be equal between the 4 venturi’s? This would be a closed loop from the display tank sump, to the fish room and back to the sump again.

 

[MarineandReef Jaron]

I have been looking at using Rob B’z Kalkwasser dosing Venturi and it occurred to me this might also be how I could remote dose other liquids to my display tank from a fish room 25-30 feet. If the water flow from the pump is split 4 ways to different Venturi’s, then another manifold combines them together, would the flow rate be equal between the 4 venturi’s? This would be a closed loop from the display tank sump, to the fish room and back to the sump again.

While there would be flow through all 4 venturis, water will always take the path of least resistance. In this case, the 2 pipes in the center have less resistance because they are closer to the inlet and outlet with less drag and head pressure than the pipes on the outside.

 

[RandyL]

If you have needle valves on all outputs, you may have a shot at balancing the flow across them. Gate valves in front may also be an option.

 

[MarineandReef Jaron]

I think the real question is do you really need the flow to be equal? My suspicion is it won't matter to any significant degree.

 

[ShakeyGizzard]

If the assembly is standing up with pipes going top to bottom, the lowest pipe will have the best flow, the top pipe the lowest. If its laying flat, as stated above the 2 middle pipes the best.

 

[The_Paradox]

If you really wanted it “balanced” you need a splitting manifold and each leg needs identical back pressure and flow rate. You could also use cross over pipes to achieve closer to laminar flow. As others have said though it does not matter.

 

[KStatefan]

No. But does it make any difference if the flow varies.?

 

[Tuan’s Reef]

It would matter if one them is for his UV.

 

[KStatefan]

It would matter if one them is for his UV.

What UV?

 

[Tuan’s Reef]

What UV?

after rereading doesn’t look like he is using it for UV or reactors which is mainly why I would want a manifold .

 

[Shon]

Why not one Venturi with
https://www.ebay.com/itm/325212086973Fed by
https://www.bulkreefsupply.com/1-4-npt-x-1-4-push-connect-elbow-ball-valve.htmlFrom pump for constant flow

 

[Shon]

I mean like this