Semi-rigid Pipe diameter

[gavztheouch]

Hi, what diameter did you use? I see there are two common diameters (75mm outer with a 63mm inner) and (90mm outer with 76mm inner)

 

Seems like the 75mm pipe is more common and therefore finding manifolds and plenums to fit may be easier to find?

 

 

Edited February 3, 2022 by gavztheouch

[JohnMo]

Used 90mm to keep velocities down, managing to use a single run where in 75mm, it would have been ideal to run two runs to the outlet.

 

No issue getting bits.

[gavztheouch]

10 minutes ago, JohnMo said:

Used 90mm to keep velocities down, managing to use a single run where in 75mm, it would have been ideal to run two runs to the outlet.

 

No issue getting bits.

 

Good point regarding double runs of smaller pipe for larger flow areas. The bigger 90mm pipe is more expensive but I guess you need less of it if you don't need to double up.

[Eric]

I used 75mm, I thought that was standard size.