What is post indicator valve detail?
What is a PIV? In short, post indicator valves (PIVs) are sturdy, above-ground access and operator valves used for automatic sprinkler systems and wet standpipe systems whose main water supply valves are located underground.
Where is a post indicator valve required?
A listed indicating valve at each connection into the building that is located at least 40′ from the building (if space permits) Control valves in a cutoff stair tower or valve room accessible from the outside. Valves located in risers with indicating posts arranged for outside operation.
Are PIVs required?
History of the PIV Requirement While not a referenced standard from the International Building Code, the International Fire Code requires that all private fire service mains be installed in accordance with NFPA 24 (IFC 2000-06 Section 508.2.
What is PIV and FDC?
Fire Department Connec ons and Post Indicator Valves. The Interna onal Fire Code (IFC) and NFPA – 24 regulate the installa on of Fire Service Features such as Fire Department Connec ons (FDC) and control valves such as Post Indicator Valves (PIV).
What is OS & Y gate valve?
QUICK. April 2012. One type of valve commonly used to control water flow to fire sprinkler systems is known as an OS&Y gate valve. OS&Y means “outside stem and yoke” or “outside screw and yoke”. OS&Y gate valves operate by opening and closing via a gate, which lowers into or rises out of the valve.
What is Post indicator gate valve?
A post indicator valve (PIV) is a valve assembly used to open or close the water supply to fire protection systems in large buildings. It consists of a conventional gate or butterfly valve located on the fire system water main with a raised post that protrudes above ground level or from a wall.
What is fire alarm PIV?
A postindicator valve (PIV) (photo 1) is commonly used as the valve operator for. automatic fire sprinkler and standpipe systems, where the system main valve is located. underground outside the building. PIVs may be located in paved or landscaped areas.
What is a wall post indicator valve?
Also known as PIV, indicator post, I post, IP, post indicator, or wall post, a post indicator valve is a valve assembly used for the purpose of underground piping for water supply to fire protection systems such as sprinklers, sprays, foams, deluges, etc.
What is a tamper switch used for?
A tamper switch is a mechanical and electrical device connected to a fire protection valve that signals a warning if the valve partially or fully closes.
What is OS & Y?
OS&Y means “outside stem and yoke” or “outside screw and yoke”. OS&Y gate valves operate by opening and closing via a gate, which lowers into or rises out of the valve. You can look at an OS&Y gate valve and tell if it is open or closed by the position of the stem.
How high should a post indicator valve be above grade?
While it doesn’t weigh-in on when these valve assemblies should be used, it states that the top of the post must be 32” to 40” above grade when they are. The section requires post indicator valves to be protected from mechanical damage. It also notes that the grading requirement doesn’t apply to wall post indicator valves.
What are the NFPA 14 requirements for post indicator valves?
The 2019 edition of NFPA 14: Standard for the Installation of Standpipe and Hose Systems offers the most specific post indicator valve requirements. Except for fire department connections, Section 6.3.6.1.1 says that every water supply should have a listed indicating valve in an approved location.
What are Mueller indicator posts used for?
Mueller® indicator posts are used in fire protection systems and perform several functions. They provide a means to operate a buried or otherwise inaccessible valve. Also, indicator posts readily and clearly indicates whether the valve is open or shut.
How do you adjust the barrel on a Bosch indicator post?
Remove the top section from the Indicator Post assembly. Loosen the telescoping barrel screw and adjust barrel to the ground level. Cut the 1” square stem at a distance of 9” above the top of the barrel end. Set the “OPEN” and “SHUT” targets for the appropriate valve size.