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Watts 909 AGC cast iron air gap trap with NPT connections

Watts

Watts 909 AGC Air Gap Trap

SKU CH-2KB9-TB5XC MPN 909

Air gap trap for Series 909 backflow preventers with 3/4 to 1 inch NPT connections, cast-iron construction rated to 140 psi and compliant with ASME A112.1.2

  • TypeDrain Components
  • Air-gap protection meets ANSI ASME A 112.1.2 code
  • Cast-iron body rated for 140 psi working pressure
  • NPT threads fit 3/4 to 1 in pipe connections
  • Designed for Series 909 backflow preventers
  • Compact 4 7/8 in length suits tight installs

Purpose and fit

The Watts 909 AGC is an air gap trap designed for use with Series 909 backflow preventers in plumbing systems. It provides the required physical separation between the potable water supply and potential contamination sources. The device suits commercial and industrial installations where local codes mandate an air gap on reduced-pressure assemblies.

Compatibility check

Verify that the existing Series 909 unit matches the 3/4 in to 1 in NPT connection range before ordering. Confirm that the piping layout can accommodate the 4 7/8 in length and 3 1/4 in width within the available space. Ensure the system operating pressure does not exceed the 140 psi rating marked on the casting.

Build and daily use

The cast iron body meets ANSI and ASME A 112.1. 2 standards for durability in continuous service. NPT threads allow direct connection to standard pipe fittings without proprietary adapters. The air gap configuration maintains a visible separation, simplifying routine inspection and compliance checks for maintenance staff.

Highlights

  • Air-gap protection meets ANSI ASME A 112.1.2 code
  • Cast-iron body rated for 140 psi working pressure
  • NPT threads fit 3/4 to 1 in pipe connections
  • Designed for Series 909 backflow preventers
  • Compact 4 7/8 in length suits tight installs

Specifications

TypeDrain Components
BrandWatts
Model909 AGC

Questions about this item

What components come with the Watts 909 AGC air gap and what must be purchased separately?

The Watts 909 AGC air gap trap is supplied as a single cast iron unit with NPT connections for 3/4 in to 1 in piping. Series 909 backflow preventer and piping are sold separately.

Which Watts 909 AGC version should I choose for my installation?

Choose this Watts 909 AGC model when your Series 909 backflow preventer uses 3/4 in to 1 in NPT connections and you need an air gap drain component rated for 140 psi.

What does the 140 psi rating mean when the Watts 909 AGC is installed?

The 140 psi maximum pressure rating means the cast iron air gap trap can safely handle the discharge pressure from a Series 909 preventer operating at its design limit without leaking or structural failure.

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