Watts 0388798 Valve

The Watts 0388798 (Series 1450F) is a professional-grade 1/2 inch dual control regulator and relief valve designed specifically for the rigorous demands of commercial and residential hydronic heating systems. As a veteran in the field, you know that maintaining precise boiler water pressure is critical to system longevity and efficiency. This unit integrates a high-capacity pressure reducing valve and a diaphragm relief valve into a single, compact iron and bronze body, ensuring your boiler feed lines remain stable even under fluctuating load conditions. It effectively manages initial system filling and provides consistent make-up water to compensate for minor leaks or pressure drops.

The Watts 1450F is built for field reliability, featuring a stainless steel strainer to protect the valve disc from fouling and a built-in purge lever for efficient manual system purging during startup or maintenance. With an adjustable reduced pressure range of 10 to 25 PSI (factory set at 15 PSI) and a safety relief valve set at 30 PSI, this dual control valve is the industry standard for NPT threaded hydronic installations. Its unitized construction allows for simplified servicing without removing the entire valve from the line, a major time-saver for contractors managing high-volume service calls.

• Dual-Function Performance: Combines reliable boiler feed water regulation with a secondary safety pressure relief valve in one housing.
• Durable Construction: Heavy-duty iron and bronze body with an internal stainless steel strainer prevents sediment buildup and mechanical failure.
• High-Flow Purging: Includes a dedicated purge lever to speed up the air removal process during initial hydronic system commissioing.
• Check Valve Integration: Features a tight-sealing check valve to prevent backflow and maintain system pressure integrity.
• Simplified Maintenance: The 1450F bypass and diaphragm design allow for quick inspection and unitized debris removal without extensive downtime.

What is the maximum operating pressure for the Watts 0388798?
This valve is rated for a maximum working pressure of 100 PSI (6.9 bar) and an operating temperature up to 212°F, making it suitable for most standard hydronic boiler applications.

Can this dual control valve be used in potable water systems?
No. This unit is specifically engineered for non-potable hydronic heating systems and does not meet the low-lead requirements for drinking water applications.

Is the relief valve pressure setting adjustable on the 1450F?
The regulator side is adjustable between 10-25 PSI, but the pressure relief valve is factory set at a fixed 30 PSI to ensure it meets standard safety vent requirements for residential boilers.

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.