INSTRUCTION MANUAL
HS-112
REVISION D
• Before using product, read and understand instructions.
• Save these instructions for future reference.
• All work must be performed by qualified personnel trained in the proper application,
installation, and maintenance of systems in accordance with all applicable codes
and ordinances.
• To prevent serious burns, wear heat resistant gloves when opening and closing supply
valves, or handling hot equipment.
• To prevent serious burns, the internal pressure of the system must be 0 psi (0 bar) before
servicing.
Failure to follow these cautions will cause personal injury.
Model 792
High Pressure Water Vent Valve
IMPORTANT: To prevent system damage from water
hammer or sudden shock, open supply valves slowly.
If you are uncertain about the product’s adaptability for
your application, please call the factory or authorized
representative before using the product.
The vent pressure rating must be equal or greater than
the maximum system pressure.
The vent discharge must be connected to a drain or fluid
recovery unit to prevent damage to the equipment or
structures in the event of leakage.
WAR
NING
CAUT
ION
CAUTION
!
Excessive use of pipe joint compound when installing air vent will foul
the vent’s operating mechanism allowing water to escape. Pipe joint
compound must be conservatively applied to male threads only. Failure
to follow this instruction can result in personal injury from hot water
and/or property damage.
!
CAUTION
When the vent discharges air or if foreign material from the system
fouls the vent’s operating mechanism, it is possible for water to also be
discharged. Vent must be piped to a drain. Failure to follow this instruc-
tion can result in personal injury from hot water and/or property damage.
!
CAUTION
The use of PTFE impregnated pipe compound and PTFE tape on pipe
threads provide lubricity which can lead to overtightening and breakage.
Do not overtighten. Failure to follow this instruction can result in
personal injury from hot water and/or property damage.
!
CAUTION
Hoffman Specialty
®
Model 792
High Pressure Water Vent Valve
