Watts 0386450 Regulator

The Watts 0386450 S1156F is a high-capacity boiler feed water pressure regulator designed for rigorous performance in residential and commercial hydronic heating systems. Built with a rugged iron and bronze body, this 1/2" water pressure reducing valve ensures consistent boiler pressure by automatically filling the system and maintaining prime. The S1156F model features a union solder inlet for reliable, leak-free integration into copper supply lines. This unit is factory preset at 15 PSI but provides a flexible 10-25 PSI adjustment range to accommodate various piping elevations and head pressure requirements. A critical component for system longevity, it includes an integrated stainless steel strainer to prevent sediment from fouling the valve seat and a fast fill purge lever for rapid system charging and manual air purging. This regulator serves as a direct, high-performance replacement for the standard 1156F series, offering superior flow rates and simplified field servicing for professional HVAC contractors.

• High-Capacity Performance: Engineered for rapid system filling and maintaining stable operating pressures in large-scale hydronic loops.
• Enhanced Protection: Features a tight seating check valve and internal strainer to prevent backflow and mechanical fouling.
• Contractor-Grade Durability: Constructed with a heavy-duty bronze and iron body capable of handling maximum pressures up to 100 PSI and temperatures to 212°F.
• Simplified Maintenance: The unitized design allows for quick access to internal components without removing the entire valve from the line.
• Customizable Pressure: Easily adjustable via the top screw to manage the specific pressure needs of 2- or 3-story buildings.

How do I adjust the pressure on the Watts S1156F?
To modify the output, loosen the lock nut on the spring cage and turn the adjusting screw clockwise to increase pressure or counter-clockwise to decrease it, monitoring the boiler gauge until the desired 10-25 PSI range is met.

Is this regulator suitable for potable water lines?
No. The Watts S1156F is designed specifically for non-potable hydronic heating applications and does not meet the low-lead requirements of the Safe Drinking Water Act for human consumption.

Can this valve be installed in any orientation?
Yes, the regulator can be installed in either horizontal or vertical positions, provided the flow arrow points toward the boiler and there is sufficient clearance for the purge lever operation.

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.