Main Vents

Bob C

I want to replace the main vents at my house with Hoffman 4a vents. They will be replace some older Dole vents. I can't figure out what Dole model they are(Very old). Anyway, What information would I need to supply you to make sure I get the correct vents. Lenght of the mains and size of pipe? Thanks for the help.

Steamhead

That's correct

Measure the length and diameter of each steam main. We can tell you what's needed. If there's old insulation on the mains, measure its outside diameter and subtract 2-1/4 inches to get the pipe size.

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