Watts LFN250B 3/4 Lead-Free Pressure Reducing Valve, Cast Iron, NPT

The Watts LFN250B 3/4 is a 3/4" lead-free pressure reducing valve with NPT connections. It is factory set at 50 psi. It features a cast iron body. Rated to 250 psi and 33°F to 160°F. This model is certified lead-free for potable-water installations.

This 3/4 inch lead free water pressure reducing valve is used in residential applications to reduce incoming domestic water pressure to protect plumbing components and reduce water consumption. It consists of a iron body with 3/4 NPT female inlet and outlet connections, stainless steel seat, integral strainer, and thermal expansion bypass feature. All parts are quickly and easily serviceable without removing the valve from the line. The reduced pressure is set at 50 psi (345 kPa) and maximum working pressure is 250 psi (17.2 bar).

Features

• Lead free construction
• Bypass feature controls thermal expansion pressure
• High temperature resisting diaphragm for hot or cold water
• Integral stainless steel strainer
• Includes: Strainer
• Includes: Bypass

Common Questions

Does it have a built-in bypass for thermal expansion, or do I still need an expansion tank?

LFN250B 3/4 includes an integral thermal-expansion bypass. When downstream pressure from a water heater rises above the inlet pressure, the bypass relieves that excess back through the valve toward the supply, which prevents nuisance pressure build-up on a closed system. It is not a substitute for a properly sized thermal expansion tank where your local code requires one - the bypass only relieves back to the street when street pressure is lower, so check the code in your jurisdiction.

What pressure is it set to out of the box?

LFN250B 3/4 ships factory set at 50 psi and can be adjusted on site with the adjusting screw.

Does it include a strainer?

Yes - LFN250B 3/4 has an integral stainless steel strainer built into the body, so you do not need a separate inline strainer ahead of it. The strainer is removable for cleaning; if the valve starts to lose downstream pressure, pull and rinse the strainer before assuming the seat has failed.

Does it come with a gauge?

No - LFN250B 3/4 has no gauge and no gauge tapping. Set the outlet pressure using a gauge elsewhere on the downstream piping. The -GG version of this model ships with a gauge tapping and a 160 psi gauge.

Specifications

• Type: Pressure Regulator
• Size: 3/4"
• Inlet Size: 3/4"
• Outlet Size: 3/4"
• Connection: NPT
• Body Material: Cast Iron
• Max Pressure (psi): 250
• Shutoff: None
• Pack Quantity: 6
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LFN250B 3/4
• Temperature: 33°F to 160°F
• Lead-Free: Yes
• Factory Set Pressure (psi): 50
• Thermal Expansion Bypass: Yes
• Integral Strainer: Yes
• Gauge: None
• Union Configuration: None
• Capacity Class: Standard
• Regulated Media: Water