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Bronze backflow preventer with strainer, NPT connections, 18-1/4 inches long

Watts

Watts LF009M2-QT-S Reduced Pressure Zone Backflow Preventer 1 In

SKU CH-DB8Q-CX93N

A 1-inch NPT backflow preventer with lead-free bronze body, integrated strainer, and ASSE/CSA/UPC/USC certification rated to 175 psi and 180 °F

  • Protects potable water with ASSE, CSA, UPC and USC certified backflow prevention
  • Lead-free bronze body meets safe-drinking-water standards for residential and commercial systems
  • Handles supply pressures up to 175 psi and water temperatures to 180 °F
  • Built-in strainer traps debris to reduce valve fouling and maintenance calls
  • Compact 18-1/4 in. length fits tight mechanical-room spaces without re-piping

1-Inch RPZ Backflow Preventer

The Watts LF009M2-QT-S is a reduced pressure zone backflow preventer built for potable water lines that require cross-connection control. Its lead-free bronze body meets ASSE, CSA, UPC and USC standards for safe installation in commercial and residential plumbing systems. The unit operates reliably between 33 and 180 degrees Fahrenheit at pressures up to 175 psi.

Replaces Non-Compliant or Worn Assemblies

This valve upgrades older backflow devices that no longer meet current lead-free or pressure ratings, or units damaged by debris and thermal cycling. The jump is worth it when local codes mandate ASSE-listed protection or when an existing preventer fails its annual test. The included strainer reduces fouling, extending service intervals compared to unprotected models.

Handles 1-Inch NPT Service Lines

The 18-1/4 inch length and 3-7/16 inch width fit standard 1-inch NPT piping in mechanical rooms, irrigation feeds and fire-service branches. It comfortably handles continuous flow within the 175 psi rating and 180-degree maximum temperature. Headroom runs out on lines exceeding 1-inch nominal size or systems requiring higher pressure classes not covered by the Series 009 design.

Highlights

  • Protects potable water with ASSE, CSA, UPC and USC certified backflow prevention
  • Lead-free bronze body meets safe-drinking-water standards for residential and commercial systems
  • Handles supply pressures up to 175 psi and water temperatures to 180 °F
  • Built-in strainer traps debris to reduce valve fouling and maintenance calls
  • Compact 18-1/4 in. length fits tight mechanical-room spaces without re-piping

Specifications

BrandWATTS

Questions about this item

What pipe size and thread type does the 1-inch Watts LF009M2-QT-S need for installation?

It connects to 1-inch NPT piping; the bronze body measures 18-1/4 inches long and 3-7/16 inches wide, so allow that clearance in the line.

How is the LF009M2-QT-S installed, and what step is often missed?

Mount it horizontally with the relief valve pointing down, then flush the line before tightening the unions so debris does not foul the internal checks.

Which parts of the LF009M2-QT-S will need replacement during routine service?

The rubber check seats, springs and the relief-valve diaphragm wear over time; the included strainer screen should also be cleaned or swapped during each test cycle.

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