WATTS® 0556031 LFN36M1 Low Profile Vacuum Relief Valve, 3/4 in Nominal, MNPT End Style, 15 psi Pressure, 15 cfm Flow Rate, Brass Body, Import

WALFN36I MFG #: 556031
  • Body Material: Brass
  • Country of Origin: CN
  • Dimensions: 2 in H x 2 in W
  • Domestic/Import: Import
  • End Style: MNPT
  • Flow Rate: 15 cfm
  • Manufacturer Name: Watts Water Technologies
  • Nominal Size: 3/4 in
  • Series: LFN36M1, N36
  • Softgoods Material: Buna-N® O-Ring/Silicon Disc
Series LFN36 Lead Free* Water Service Vacuum Relief Valves are used in water heater/tank applications to automatically allow air to enter into the piping system to prevent vacuum conditions that could siphon the water from the system and damage water heater/tank equipment. It consists of a Lead Free* brass body construction with NPT male inlet connection, and a protective cap. Series LFN36 has a low profile design, is tested and rated to ANSI Z21.22, and is CSA certified. It is suitable for low pressure steam and water service, and is ideal for use in domestic water heaters and supply tanks, table top heaters, jacketed steam kettles, unit heaters, low pressure steam systems, and steam coil heaters. Maximum Working Pressure: 200psi (13.8 bar), Maximum Steam Pressure: 15psi (103 kPa).
  • Features and More


  • Protective cap
  • Suitable for low pressure steam and water service
  • Jacketed steam kettles, table top heaters, unit heaters, low pressure steam systems, steam coil heaters, domestic water heaters and supply tanks
  • The wetted surface of this product contacted by consumable water contains less than one quarter of one percent (0.25%) of lead by weight


  • Water Heater and Tank


  • ANSI Z21.22
  • CSA certified
  • PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.