×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Reduced Pressure Backflow relief and Dry system tripping

Reduced Pressure Backflow relief and Dry system tripping

Reduced Pressure Backflow relief and Dry system tripping

(OP)
I have a project that has been completed recently and I'm told there has been water in the mechanical room. Specifics were not given but I'm 99% sure it's from the relief vent on the reduced pressure backflow. The contractor was on site, did some investigating and determined that they need to install a check valve BEFORE the reduced pressure backflow. I'm told that the city water has experienced pressure surges and the contractors reason for the check valve was to absorb these surges. In addition, the dry sprinkler system tripped.

My issue that doesn't make sense to me. If there is a surge, then a sudden drop I could see a backflow condition. However, what would the check valve do? Also, why would this backflow condition trip the dry system? I am trying to confirm that they submitted hydrostatic testing reports and such. Waiting for my PM to confirm.

Any thoughts/solutions/advice?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources