Watts 386425 Feed Water Pressure Regulator 0.5 Inch Iron

Product Description

The WATTS 386425 is a Series 1156F feed water pressure regulator designed to fill boiler systems and maintain steady water pressure in hydronic piping at all times. Built with a threaded iron body in a 0.5-inch connection size, this valve continuously monitors system pressure and admits make-up water whenever pressure drops due to system leaks or normal operation. The unitized internal design allows for complete maintenance without removing the valve from the line, reducing service time on the job. Licensed plumbers and hydronic heating technicians are the primary installers of this type of regulator.

This regulator is suited for residential and light commercial hydronic heating systems where a reliable, automatic boiler feed is required. It installs on the cold water supply line feeding the boiler, holding system pressure within the set range and protecting the system from running dry. The high-capacity flow path supports proper fill rates for larger system volumes, making it appropriate for multi-zone hot water heating installations as well as single-zone residential boilers.

Key Features

• Automatic feed water control maintains consistent system pressure at all times
• Provides make-up water to the system in response to pressure loss from leaks
• High-capacity performance supports adequate fill rates for larger hydronic systems
• Unitized internal components allow complete servicing without removing the valve from the piping
• Threaded iron body construction for durable installation in boiler room environments

Compatibility

Designed as an OEM-style replacement or new-installation feed water pressure regulator for residential and light commercial hydronic boiler systems requiring a 0.5-inch threaded connection.

Installation Notes

Installation should be performed by a licensed plumber or hydronic heating technician in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off the cold water supply and depressurize the boiler system before beginning installation or service work. Do not over-tighten threaded connections on the iron body, and use appropriate thread sealant rated for potable or heating system water. Verify system pressure after installation to confirm the regulator is holding within the required operating range.

Technical Specifications

• Connection Size: 0.5 inches
• Connection Type: Threaded
• Body Material: Iron
• Series: 1156F

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 386425