Watts 0386422 Regulator

The Watts 0386422, technically recognized as the SB1156F 1/2" Bronze Feed Water Pressure Regulator, is a high-capacity solution engineered for hydronic heating systems. Built with a durable bronze valve body and a union solder inlet x NPT threaded outlet, this regulator is designed to automatically fill boiler piping and maintain a consistent system head. Optimized for hydronic boiler feed applications, it features an adjustable pressure range of 10 to 25 psi, factory set at 15 psi, and supports a maximum working pressure of 100 psi. A critical component for HVACR technicians, the unit integrates a stainless steel strainer to prevent disc fouling and an emergency purge lever for rapid system filling and air removal. Its high-capacity performance ensures reliable make-up water delivery during small system leaks while the tight-seating check valve prevents backflow of boiler water into the supply line.

• Durable Construction: Heavy-duty bronze body resists corrosion in residential and commercial closed-loop systems.
• Debris Protection: Integrated 1/2 inch stainless steel strainer screen protects internal components from sediment.
• Simplified Service: Features a unitized design that allows for complete maintenance without removing the valve from the piping.
• Rapid Filling: Built-in manual purge lever enables quick manual filling of the system during initial commissioning.
• Versatile Compatibility: Standard 1/2" union solder connection facilitates seamless integration into existing copper boiler lines.

Is the Watts SB1156F suitable for potable water systems?
No, this regulator is designed specifically for non-potable hydronic heating applications. It does not meet the low-lead requirements for drinking water installations.

Can the factory pressure setting be adjusted in the field?
Yes, while factory set at 15 psi, the field technician can adjust the boiler feed pressure between 10 and 25 psi to meet specific system requirements.

What is the maximum operating temperature for this unit?
The 0386422 is rated for a maximum temperature of 212°F (100°C), making it suitable for standard high-temperature hydronic loops.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.