Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

new boiler install

Ok here is my question. This is a two pipe system, the supply pipe is a 4". The new boiler has 2.5" taps  coming off. Where should I enlarge the piping at: as close to the boiler as possible or when the new pipe meets the old? Have not called manufacturer yet but I know I will. What do you guys think.

Comments

  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,565
    steam header piping

    have a look at the mfg's installation requirements, and instructions;  and follow them as a minimum. otherwise excessive steam velocity will pick up too much water, and you will have wet steam.

    generally, you need full diameter from the supply tappings [use them all]  all the way up to the 24 " above waterline minimum, and if you can do a drop header, so much the better. the transition of boiler size to steam main size should be above that height.--nbc
This discussion has been closed.