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Brass freeze-resistant vacuum breaker, 2-13/16 inches high

Watts

Watts LFN9CD Freeze Resistant Vacuum Breaker 3/4 in

SKU CH-5XAX-QMHDZ

Freeze-resistant vacuum breaker with dual-check brass body rated to 125 psi and 33–180 °F, meeting ASSE 1052 and CSA standards

  • Size3/4"
  • TypeOther
  • Freeze resistant operation down to 33 °F
  • Dual check design prevents backflow contamination
  • Brass body rated for 125 psi maximum pressure
  • Certified to ASSE 1052 and CSA standards
  • Lead-free construction meets safe drinking water requirements

Watts LFN9CD Freeze Resistant Vacuum Breaker

The Watts LFN9CD is a dual-check vacuum breaker designed for potable water systems that require backflow prevention with freeze resistance. It suits residential and light-commercial plumbing installations where a compact, lead-free device is specified by code. The 3/4 inch connection fits standard supply lines without adapters.

3/4 in brass body fits standard supply lines

The brass body measures 1 1/2 in wide by 2 13/16 in high, allowing it to sit in tight cavities behind fixtures or inside meter boxes. It threads directly onto 3/4 in male pipe threads, so no special fittings or tools are required beyond normal pipe sealant. The dual-check design provides protection without an external relief port, keeping the installation simple.

Rated to 125 psi and 180 °F with ASSE 1052

The unit operates continuously from 33 °F to 180 °F at pressures up to 125 psi, covering typical domestic hot and cold distribution. It meets ASSE 1052 and CSA standards for backflow prevention and lead-free construction. Systems exceeding 125 psi or temperatures above 180 °F will need a different device rated for those conditions.

Highlights

  • Freeze resistant operation down to 33 °F
  • Dual check design prevents backflow contamination
  • Brass body rated for 125 psi maximum pressure
  • Certified to ASSE 1052 and CSA standards
  • Lead-free construction meets safe drinking water requirements

Specifications

BrandWATTS
Size3/4"
TypeOther

Questions about this item

Will the 125 psi pressure limit be reached before the 180 °F temperature limit in a closed hot-water system?

The vacuum breaker is rated for a maximum of 125 psi and a temperature range of 33 °F to 180 °F. In a closed system, thermal expansion can push pressure past 125 psi well before the water reaches 180 °F, so the pressure limit typically governs.

Does the brass body stay cool enough to touch after hours of 180 °F water flow?

Brass conducts heat efficiently, so the body will approach the water temperature. At the 180 °F upper limit the exterior will be too hot to touch safely; insulation or a protective cover is advisable for continuous high-temperature operation.

My outdoor faucet has 3/4 inch male hose threads — will this breaker screw straight on?

The unit has a 3/4 inch female connection, so it threads directly onto a standard 3/4 inch male hose bibb. No extra adapters are needed if the faucet matches that thread size.

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