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Cast iron air gap trap with NPT connections

Watts

Watts 909 AGF air gap trap

SKU CH-D8C6-J0BXY MPN 909

An air-gap trap for Series 909 backflow preventers, cast-iron construction rated to 140 psi and compliant with ANSI ASME A 112.1.2

  • TypeDrain Components
  • Compatible with Series 909 backflow preventers
  • Cast iron construction handles up to 140 psi pressure
  • Meets ANSI and ASME A 112.1 standards
  • NPT connection simplifies installation on existing piping
  • Air gap design prevents cross-contamination in drainage systems

Air Gap Compatibility

The Watts 909 AGF air gap trap connects to Series 909 backflow preventers ranging from 1-1/4 in to 3 in NPT. Cast iron construction withstands pressures up to 140 psi and meets ANSI and ASME A 112.1.2 standards. The unit measures 6 3/4 in length by 4 3/8 in width. It provides a physical separation to prevent cross-contamination in plumbing systems.

Installers Needing Code-Compliant Discharge

This trap suits plumbers and maintenance crews installing or servicing Series 909 assemblies where an air gap is required by code. It is not intended for use with other backflow preventer models or smaller residential fixtures lacking the matching NPT connection range. Buyers needing a direct drain connection without an air gap should look at alternative discharge fittings.

140 psi Pressure Rating

The maximum working pressure of 140 psi determines whether this trap matches the system design pressure. Verify the installation pressure against this limit before specifying the part.

Highlights

  • Compatible with Series 909 backflow preventers
  • Cast iron construction handles up to 140 psi pressure
  • Meets ANSI and ASME A 112.1 standards
  • NPT connection simplifies installation on existing piping
  • Air gap design prevents cross-contamination in drainage systems

Specifications

TypeDrain Components
BrandWatts
Model909 AGF

Questions about this item

How can I verify the 909 AGF air gap is functioning correctly after installation?

Check that water flows freely through the NPT connection without backflow and confirm the assembly holds pressure up to 140 psi during a system test.

What components are included with the 909 AGF and what additional fittings might be required?

The unit ships as a complete cast iron air gap body; separate NPT pipe nipples or adapters matching your 1-1/4 to 3 inch piping must be purchased separately.

Which Series 909 size range should I select for my 1-1/4 to 3 inch drainage line?

Choose the 909 AGF model rated for the full 1-1/4 to 3 inch range to match your existing Series 909 piping and ANSI ASME A 112.1.2 compliance needs.

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