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Compact brass anti-siphon vacuum breaker with silicone seal, NPT threads

Watts

Watts LF288AC Anti-Siphon Vacuum Breaker 1/2" Silicone

SKU CH-CDM3-T1YZ8

Anti-siphon vacuum breaker with silicone seal for 125 psi systems meeting ASSE 1001 and NSF 372 standards

  • TypePipes, Valves & Fittings
  • Prevents back-siphonage with ANSI A 112.1. 1 and ASSE 1001 certification
  • Lead-free brass body meets NSF/ANSI 372 and CSA B64 standards
  • Silicone seal operates from 33 to 180 degrees Fahrenheit
  • Withstands up to 125 psi maximum working pressure
  • Compact 2 3/4 inch height fits tight plumbing spaces

Purpose and Fit

The Watts LF288AC is a 1/2 inch anti-siphon vacuum breaker designed for potable water systems. It prevents back-siphonage in residential and light commercial plumbing installations. The unit features a lead-free brass body with a silicone seal for reliable operation.

Who It Serves and Who It Does Not

This breaker suits installers needing a code-compliant device certified to ANSI A 112.1.1 and ASSE 1001 standards. It is not intended for continuous pressure applications or installations requiring an atmospheric vacuum breaker with a different connection size. Buyers needing higher pressure ratings or alternative seal materials should look elsewhere.

Installation Context

The device installs directly onto a 1/2 inch NPT female thread and operates within a temperature range of 33 to 180 degrees Fahrenheit at a maximum pressure of 125 psi. Its compact height of 2 3/4 inches allows placement in confined spaces. Compliance with NSF/ANSI 372 ensures suitability for lead-free plumbing requirements.

Highlights

  • Prevents back-siphonage with ANSI A 112.1. 1 and ASSE 1001 certification
  • Lead-free brass body meets NSF/ANSI 372 and CSA B64 standards
  • Silicone seal operates from 33 to 180 degrees Fahrenheit
  • Withstands up to 125 psi maximum working pressure
  • Compact 2 3/4 inch height fits tight plumbing spaces

Specifications

BrandWATTS
TypePipes, Valves & Fittings

Questions about this item

Will this 1/2 in NPT vacuum breaker thread directly onto my existing copper supply line?

Yes, the 1/2 in NPT connection matches standard half-inch threaded pipe, so it screws onto male NPT threads without an adapter.

Can the silicone seal handle the 180 Degrees F upper limit if my older water heater runs hot?

The silicone disc float is rated for the full 33 to 180 Degrees F range, so it remains pliable and seals correctly at the maximum temperature.

How do I confirm the anti-siphon function is active after installation?

Open the downstream fixture; water should flow freely. Shut it off — if no water discharges from the atmospheric vent, the breaker is sealing and preventing back-siphonage.

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