WATTS® 0163803 LLL40XL Automatic Reseating Temperature and Pressure Relief Valve, 3/4 in, MNPT x FNPT, 150 psi, Bronze Body

1179126 MFG #: 0163803
$346.50 / ea
  • Application: For commercial water heater applications
  • Body Material: Bronze
  • Brand: WATTS®
  • Dimensions: 2.64 in W x 8.66 in H
  • End Style: MNPT x FNPT
  • Manufacturer: Watts Water Technologies
  • Nominal Size: 3/4 in
  • Pressure Rating: 150 psi
  • Series: LLL40XL
  • Temperature Rating: 210 deg F
  • Type: Automatic Reseating

WATTS® Temperature and Pressure Relief Valve, Automatic Reseating, Series: LLL40XL, 3/4 in Nominal Size, MNPT x FNPT, 150 psi, 210 deg F, Bronze Body, 2.64 in W x 8.66 in H

Series LL40XL, LLL40XL Extended Shank Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters. They feature an extended shank for installation on water heaters with extra thick insulation as well as a bronze body with NPT male inlet and NPT female outlet connections, unique thermostat with special thermo-bonded coating, tamper-resistant bonnet screws, automatic reseating feature, and test lever. Model LL40XL is available in sizes 3/4 and 1 in. (20 and 25mm). Model LLL40XL is available in size 3/4 (20mm) with an extra long extended shank. Series 40L, 40XL valves are ASME rated and CSA listed. Temperature Relief: 210 degF (99 degC), Pressure Range: 75 to 150psi (5.2 to 10.3 bar), Standard Pressure Settings: 75, 100, 125, or 150psi (5.27, 7.03, 8.79, or 10.55 bar).

  • Features
  • Lead free
  • Non-mechanical seat-to-disc alignment
  • Thermostat is accurate and proven exclusively designed and manufactured by Watts
  • Tamper-resistant bonnet screws
  • Unique thermostat with a special thermo-bonded coating
  • A relief valve functions in an emergency by discharging water
  • Therefore, it is essential that a discharge line be piped from the valve in order to carry the overflow to a safe place of disposal
  • The discharge line must be the same size as the valve outlet and must pitch downward from the valve and terminate at least 6 in (152 mm) above the floor drain where any discharge will be clearly visible
  • For 100DT discharge line consult your Watts agent
  • The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight
  • Standard/Approvals: ANSI Z21.22, ASME rated, CSA certified, MIL-V 136-12D
  • WARRANTY: Limited