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Brass anti-siphon vacuum breaker with NPT threads

Watts

Watts LF288A 1/2 in Anti-Siphon Vacuum Breaker

SKU CH-PZRD-GKTH9

Anti-siphon vacuum breaker prevents backflow with lead-free brass construction, silicone seal, and 125 psi rating meeting ANSI, ASSE and CSA standards

  • TypePipes, Valves & Fittings
  • Prevents backflow with ANSI A 112.1.1 and ASSE 1001 certification
  • Lead-free brass construction meets NSF/ANSI 372 and CSA B64 standards
  • Operates from 33 to 180 degrees Fahrenheit at 125 psi max pressure
  • Compact 2 3/4 inch height fits tight plumbing spaces
  • Silicone seal ensures reliable shut-off across the full temperature range

What this vacuum breaker does

The Watts LF288A is a 1/2 in anti-siphon vacuum breaker designed for bath faucet installations. It prevents back-siphonage to protect potable water supplies from contamination. The lead-free brass body meets low-lead requirements for drinking water systems. Suitable for residential and commercial plumbing repairs or new installations.

Connection and pressure rating

This valve uses a 1/2 in NPT connection for standard pipe threading. It is rated for a maximum pressure of 125 psi and operates within a temperature range of 33 to 180 degrees F. The silicone seal ensures reliable shut-off across the rated temperature span. Verify your system pressure and pipe size before ordering.

Standards and operating environment

The device complies with ANSI A 112.1.1, ASSE 1001, CSA B64, NSF/ANSI 372 and UPC standards for backflow prevention. Lead-free brass construction resists corrosion in typical indoor plumbing conditions. No electrical power or moving parts are required, so noise and heat output are negligible during normal flow.

Highlights

  • Prevents backflow with ANSI A 112.1.1 and ASSE 1001 certification
  • Lead-free brass construction meets NSF/ANSI 372 and CSA B64 standards
  • Operates from 33 to 180 degrees Fahrenheit at 125 psi max pressure
  • Compact 2 3/4 inch height fits tight plumbing spaces
  • Silicone seal ensures reliable shut-off across the full temperature range

Specifications

BrandWATTS
TypePipes, Valves & Fittings

Questions about this item

What does the 125 psi pressure rating mean for everyday plumbing use?

It means the breaker can handle normal household supply pressure without leaking or failing, so it will stay sealed on standard municipal or well systems.

Which standard governs the NPT connection and what does it limit?

The ANSI A 112.1.1 standard defines the NPT thread dimensions, ensuring a reliable seal with matching 1/2 in fittings and preventing cross-threading.

How much vertical space does the 2 3/4 in height require under a faucet?

You need at least 2 3/4 inches of clear vertical room above the supply outlet so the float disc can move freely and vent air properly.

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