What's this thing, and how should I fix. PRV Valve

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Drewbdoo, Jun 10, 2014.

  1. Drewbdoo

    Drewbdoo New Member

    Joined:
    Jun 10, 2014
    Location:
    Nebraska
    Hi, I'm in a 1960's house and have some mold growing near the main pipe that enters the house.
    Looks kinda black. It's fresh growth, a water guy turned a spigot that leaked after he left and now the mold is on the pipes and spigot.

    Couple questions. What's the circled thing?
    2014-06-10_08-26-34_422.jpg

    And any tips to fix this situation?

    I'm very new, to cleaning (blackish) mold and plumbing.
     

    Attached Files:

  2. nhmaster3015

    nhmaster3015 Master Plumber

    Joined:
    Jul 30, 2008
    Occupation:
    Teacher
    Location:
    The granite state
    Its a pressure reducing valve
     
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