Caleffi 573017A Backflow Preventer and AutoFill Combination 1/2" Press x FPT W/Gauge

Caleffi 573017A

Series DuoVent High Capacity Air Vents with Manual Vent Feature are used in commercial and residential hydronic heating applications to provide automatic air venting for hot or cold water distribution systems. It consists of a brass body construction with female NPT connection, brass cover, air vent with silicone rubber seal, shutter, polyethylene float with valve plug, automatic vent with black cap, and manual vent with red cap. Series DuoVent has a high capacity and high temperature rating and is ideal for use with glycol systems or for use as an anti-vacuum device. Can be disassembled for inspection and cleaning.

Air vent with silicone rubber seal
• Impurities do not usually affect function as maximum float line of water is always lower than the valve seal
• Float is high temperature resistant polyethylene
• Suitable for use with glycol systems
• With manual vent feature
  

  Watts Water 590719

Caleffi 573016A Backflow Preventer and AutoFill Combination 1/2" Press W/Gauge

Caleffi 573016A

Caleffi 573019A Backflow Preventer & AutoFill Combination W/Pressure Gauge

Caleffi 573019A

VentRite 77VT Brass Non-Adjustable Air Valve, 3/4 x 1/2", Male x Female

All vents are factory assembled, tested and inspected in the USA
• Each vent is individually packed with external labeling for convenience and maintenance
• Our vents have all brass internals with nickel plated and hand polished exterior
• Every Vent-Rite vent is factory assembled, tested and inspected in the USA
  

  Vent-Rite Corporation 77VT