
Watts 0388800 Regulator
The Watts 0388800 S1450F is a high-capacity boiler feed water pressure regulator and safety relief valve designed for professional hydronic heating installations. This dual control unit effectively manages system pressure by automatically filling the boiler and piping while maintaining consistent levels during operation. Built for durability, the valve features a robust iron and bronze body with 1/2-inch union sweat (solder) inlet and NPT threaded outlet connections, making it a reliable solution for residential and commercial hydronic heating systems. The integrated stainless steel strainer prevents sediment from fouling the valve disc, while the tight-seating check valve prevents backflow. Technicians will appreciate the manual purge lever, which simplifies system startup and air elimination. With a standard reduced pressure setting of 12-15 PSI and a relief setting of 30 PSI, this dual control valve is rated for a maximum operating temperature of 212°F and a maximum working pressure of 100 PSI. This unit provides the necessary make-up water for systems with minor leaks, maintaining pressure without manual intervention.
Key Benefits
- Includes a dual control regulator and relief valve combo in a single unitized construction for streamlined installation.
- Features a high-capacity design with an integrated purge lever for fast filling and easy air removal from the boiler loop.
- Equipped with a 1/2" union sweat inlet to simplify connection to copper supply lines.
- Utilizes a stainless steel strainer to protect internal components from system debris and scale.
- Designed with an iron and bronze body for long-term structural integrity in non-potable heating applications.
Common Questions
How do I adjust the system pressure on this regulator?
The reduced pressure can be adjusted by loosening the lock nut and turning the adjustment bolt on top of the regulator. Turning the bolt clockwise increases the discharge pressure into the heating system.
Can this valve be used for potable water applications?
No, the 0388800 is not lead-free and is strictly intended for closed-loop hydronic heating systems. It does not meet the requirements for potable water service.
What is the purpose of the manual purge lever?
The purge lever allows the technician to bypass the pressure regulation setting to force water through the system at higher flow rates, specifically for purging air during the initial fill.
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.
Original: $376.43
-65%$376.43
$131.75Watts 0388800 Regulator
The Watts 0388800 S1450F is a high-capacity boiler feed water pressure regulator and safety relief valve designed for professional hydronic heating installations. This dual control unit effectively manages system pressure by automatically filling the boiler and piping while maintaining consistent levels during operation. Built for durability, the valve features a robust iron and bronze body with 1/2-inch union sweat (solder) inlet and NPT threaded outlet connections, making it a reliable solution for residential and commercial hydronic heating systems. The integrated stainless steel strainer prevents sediment from fouling the valve disc, while the tight-seating check valve prevents backflow. Technicians will appreciate the manual purge lever, which simplifies system startup and air elimination. With a standard reduced pressure setting of 12-15 PSI and a relief setting of 30 PSI, this dual control valve is rated for a maximum operating temperature of 212°F and a maximum working pressure of 100 PSI. This unit provides the necessary make-up water for systems with minor leaks, maintaining pressure without manual intervention.
Key Benefits
- Includes a dual control regulator and relief valve combo in a single unitized construction for streamlined installation.
- Features a high-capacity design with an integrated purge lever for fast filling and easy air removal from the boiler loop.
- Equipped with a 1/2" union sweat inlet to simplify connection to copper supply lines.
- Utilizes a stainless steel strainer to protect internal components from system debris and scale.
- Designed with an iron and bronze body for long-term structural integrity in non-potable heating applications.
Common Questions
How do I adjust the system pressure on this regulator?
The reduced pressure can be adjusted by loosening the lock nut and turning the adjustment bolt on top of the regulator. Turning the bolt clockwise increases the discharge pressure into the heating system.
Can this valve be used for potable water applications?
No, the 0388800 is not lead-free and is strictly intended for closed-loop hydronic heating systems. It does not meet the requirements for potable water service.
What is the purpose of the manual purge lever?
The purge lever allows the technician to bypass the pressure regulation setting to force water through the system at higher flow rates, specifically for purging air during the initial fill.
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.
Product Information
Product Information
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Description
The Watts 0388800 S1450F is a high-capacity boiler feed water pressure regulator and safety relief valve designed for professional hydronic heating installations. This dual control unit effectively manages system pressure by automatically filling the boiler and piping while maintaining consistent levels during operation. Built for durability, the valve features a robust iron and bronze body with 1/2-inch union sweat (solder) inlet and NPT threaded outlet connections, making it a reliable solution for residential and commercial hydronic heating systems. The integrated stainless steel strainer prevents sediment from fouling the valve disc, while the tight-seating check valve prevents backflow. Technicians will appreciate the manual purge lever, which simplifies system startup and air elimination. With a standard reduced pressure setting of 12-15 PSI and a relief setting of 30 PSI, this dual control valve is rated for a maximum operating temperature of 212°F and a maximum working pressure of 100 PSI. This unit provides the necessary make-up water for systems with minor leaks, maintaining pressure without manual intervention.
Key Benefits
- Includes a dual control regulator and relief valve combo in a single unitized construction for streamlined installation.
- Features a high-capacity design with an integrated purge lever for fast filling and easy air removal from the boiler loop.
- Equipped with a 1/2" union sweat inlet to simplify connection to copper supply lines.
- Utilizes a stainless steel strainer to protect internal components from system debris and scale.
- Designed with an iron and bronze body for long-term structural integrity in non-potable heating applications.
Common Questions
How do I adjust the system pressure on this regulator?
The reduced pressure can be adjusted by loosening the lock nut and turning the adjustment bolt on top of the regulator. Turning the bolt clockwise increases the discharge pressure into the heating system.
Can this valve be used for potable water applications?
No, the 0388800 is not lead-free and is strictly intended for closed-loop hydronic heating systems. It does not meet the requirements for potable water service.
What is the purpose of the manual purge lever?
The purge lever allows the technician to bypass the pressure regulation setting to force water through the system at higher flow rates, specifically for purging air during the initial fill.
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.












