Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit

Vapor/vacuum system?

I need some help.

In my area of the country, there are very few steam systems and almost all of them are one-pipe basic steam systems.  However, I was asked to replace a customer's steam boiler today and when I went to assess the job, I found a strange box near the boiler.  It is a Hoffman boiler return trap.  Along with this I also found a float vent/air eliminator.  The rads are two pipe with the Hoffman #17a trap. 

Am I looking at a vapor/vacuum system, and if so, should I not attempt to replace the boiler as I may be 'married' to a lot of problems in the future?

Let me know what your opinions are.  Thanks                  Curt


  • jumperjumper Posts: 1,282Member
    get it in writing

    If customer signs off maybe. I was once the engineer of record for a school's boiler replacement. There was some trouble with boys' washroom drain. I was obliged to attend Friday morning meetings to discuss the problem. It went on so long I hired a retired engineer to drive out there each week.
This discussion has been closed.


It looks like you're new here. If you want to get involved, click one of these buttons!