high side of drop header

Chips

Can I run my two 4in. risers off the high side of the 3 in. drop header, similar to what Ron Jr. did on his beautiful counter flow system? I know it is not the recommended boiler piping for a 1 pipe gravity flow system with a dry return, but it would save me from relocating my existing risers and mains. The A dimension is over 10 feet and the mains are a couple feet above that.
Thanks
Chips

gerry gill

if you have two

4'' risers, then why do you only have a 3'' header? am i missing something here.

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bob young

sketch

i think you gotta clarify the piping arrangement with a sketch. a pitcher is worth a thousand words thing.

Chips

I will be installing 2 new megasteamers piped as shown on page 67 of Dan’s book and similar to page 14 of Burnhams heathelper. The common drop header will be run between the 2 boilers so piping will be very tight. I plan on using 4” if I can fit it in the space.
Chips