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Header sizing

Dave0176Dave0176 Posts: 184Member ✭✭
On that WM EG30 boiler I'm installing, should I run two 2" risers into a 3" header. Or should I size it to a 2 1/2" header.


  • Paul SPaul S Posts: 522Member

    What does the manufacture say?I usually use the size the manufacture states for the risers and I go up a inch for the header...for example of it says 3 inch header I use 4 inch Paul S
  • JStarJStar Posts: 2,616Member ✭✭✭

    ****Header Size per Maximum BTUH Output****

    (Based on Velocity of 15 ft/sec. to 20 ft/sec.)

    2" Header = 48,384 - 64,512

    2.5" Header = 68,832 - 91,776

    3" Header = 106,416 - 141,888

    4" Header = 183,312 - 244,416

    5" Header = 287,856 - 383,808

    6" Header = 416,016 - 544,688
    - Joe Starosielec
    732-494-4357 ext. 2
  • Dave0176Dave0176 Posts: 184Member ✭✭
    Thanks Jstar

    I seen that chart, but I also seen 3&4 section boiler 3" header 5&6 section boilers 4" header??? Should I run at least a 2 1/2 header??
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