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

Alternate Device for Vaporstat

I'm a bit tired of these new Vaporstats that are not accurate, cannot be set low enough, and are not capable of repeatable cycles at a set pressure. In short, they are horrible.

What are you guys using for systems that run very low pressure. Yes, I realize that I still will have to use some sort of approved pressure control for code reasons.

I finally finished the refurbishing of that Richardson system. The lower I set the pressure, the better it ran. Outstanding!

Nothing better than a happy customer that FINALLY has comfort in his house after years of inconsistent heating.
Al Corelli


  • FizzFizz Posts: 522Member
    Al, curious as to what you did to refurbish Ricardson? What pressure are you running at on system? I too have Richardson and only control is P-trol, with 32 oz pressure gauge for reading. System runs between 1-2 oz. Had v-stat which malfunctioned.
  • gerry gillgerry gill Posts: 2,962Member
    You can build your own, using some low water cut offs placed on a column built on a boiler or if it's two pipe steam, on the B dimension. We have done this before and I still have the wiring diagram for one of them that I will attach below. It's an expensive way to go however, when accuracy is needed it works.

    Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.

  • AlCorelliNYAlCorelliNY Posts: 63Member
    Thanks Guys.

    Fizz, It runs at 5.6oz now, only because that is as low as the VS can go and reliably restart. We re-vented the return, added vents to the steam main, and removed incorrect/inoperative valves from the radiators. Then we replaced a Cyclegard with a Safegard.
    The system runs so well now that the return line runs cool, even when it is 7 degrees outside.
    I'd love to do a two-stage gas valve to increase cycle times, but everything is running fine.
    Al Corelli

  • FizzFizz Posts: 522Member
    Thanks Al!
Sign In or Register to comment.


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