gavztheouch Posted February 3, 2022 Share Posted February 3, 2022 (edited) 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 Link to comment Share on other sites More sharing options...
JohnMo Posted February 3, 2022 Share Posted February 3, 2022 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. Link to comment Share on other sites More sharing options...
gavztheouch Posted February 3, 2022 Author Share Posted February 3, 2022 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. Link to comment Share on other sites More sharing options...
Eric Posted February 3, 2022 Share Posted February 3, 2022 I used 75mm, I thought that was standard size. Link to comment Share on other sites More sharing options...
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