Watts LF111-175 1/2 Lead-Free Relief Valve, Bronze, MNPT

The Watts LF111-175 1/2 is a 1/2" lead-free pressure relief valve for tankless / thermal expansion service, factory set at 175 psi. It features a bronze body. Rated to 175 psi. This model is certified lead-free for potable-water installations.

This 1/2 inch lead free pressure relief valve is designed for residential hot water supply applications and provides pressure relief protection only against thermal expansion in water. This valve consists of a lead free bronze body with 1/2 inch NPT threaded male inlet and 1/2 inch NPT threaded female (drain) outlet, and stainless steel pressure spring. The pressure relief is set at 175 psi (12.07 bar).

Features

• Lead free bronze body construction
• Pressure relief is set at 175 psi
• 1/2" male NPT inlet by 1/2" female (drain) outlet
• Provides protection against thermal expansion

Common Questions

What pressure is this valve set to?

It is factory set to relieve at 175 psi. The setting is fixed and is not field-adjustable.

Can I use this on potable water?

Yes. It is certified lead-free to NSF/ANSI 372, which is what plumbing codes require for any device in a drinking-water line.

Specifications

• Type: Relief
• Size: 1/2"
• Inlet Size: 1/2"
• Outlet Size: 1/2"
• Connection: MNPT
• Body Material: Bronze
• Max Pressure (psi): 175
• Pack Quantity: 50
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LF111-175 1/2
• Lead-Free: Yes
• Relief Type: Pressure Only
• Factory Set Pressure (psi): 175
• Application: Tankless / Thermal Expansion
• Shank Length: Standard
• Connection Configuration: MNPT inlet x FNPT outlet
• Approved for Potable Water: Yes
• SentryPlus Alert Flood Sensor: No