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Header and boiler riser size

CherylR
Member Posts: 2
I am going to be installing a new Peerless 63-04L boiler, and I have a question about the size of the header and boiler risers. I am considering either two 2 inch risers with a 2 1/2 inch header, or two 2 1/2 inch risers with a 3 inch header. Is there an advantage to using the larger size when my steam main is 2 1/2 inches?
0
Comments
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The larger size
will slow down the steam and do a better job of separating out any water that gets that far. The specified header is 2-1/2", but it can't hurt to go with 3". That's what I'd do if it were mine.All Steamed Up, Inc.
"Reducing our country's energy consumption, one system at a time"
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Baltimore, MD (USA) and consulting anywhere.
https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc0 -
Thanks
Okay, thanks! I will go with the larger size.0 -
Header and Risers
From what I've seen, the pros usually make the header at least 1" pipe size larger than the risers. I think this is because they want the cross-sectional area of the header to be as big as that of the two risers combined.
NPS cross section
2" 3.356
2 1/2" 4.788
3" 7.393
3 1/2" 9.887Just another DIYer | King of Prussia, PA
1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-240 -
I'm with Steamhead
I'd go with the larger size too.
While the improvement between the two may sometimes be nearly immeasurable, on some systems it will make a large difference. By dividing the added cost, which is generally only in materials, over the years of the boiler's life, it's negligible.
I think the larger header is probably a good investment if you can do it.0
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