Watts 0278450 Valve
The Watts 0278450 (model 174A-2-100) is a heavy-duty, ASME Section IV certified hot water pressure relief valve designed specifically for large-scale commercial and industrial boiler applications. With a massive relief capacity of 9,970,000 BTU/hr and a factory setting of 100 PSI, this 2-inch bronze valve provides critical overpressure protection for high-output heating systems. This model features NPT female inlet and outlet connections, a stainless steel spring, and a non-metallic disc-to-metal seating arrangement that prevents sticking and freezing even in harsh water conditions.
For contractors managing hydronic heating systems, the Watts 174A series is the industry standard for reliability. The bronze body construction and raised seat design ensure that sediment cannot collect around the seal, maintaining a tight shut-off and consistent boiler safety relief. This unit is often specified for commercial HVAC boiler maintenance where high-capacity relief valves are required to meet local mechanical codes. The 174A-2-100 is identical to the 0278450, ensuring a direct drop-in replacement for existing Watts 174A series installations.
Key Benefits:- High BTU Rating: Capable of handling up to 9,970,000 BTU/hr, making it suitable for high-output commercial boilers.
- Durable Construction: Features a rugged bronze body and stainless steel spring for long-term service in hot water space heating.
- Foul-Resistant Design: The seat is positioned above the drain to prevent water trapping and sediment interference.
- Automatic Reseating: Engineered for emergency safety relief with reliable automatic reseating after pressure normalization.
- ASME Certified: Built and tested to meet ASME Section IV requirements for heating boilers.
Is the Watts 0278450 the same as the 174A-2-100?
Yes, these part numbers are interchangeable. The 0278450 is the specific ordering code for the 2-inch 174A valve factory-set at 100 PSI.
Can this valve be used for potable water applications?
No, the standard 174A series is designed for non-potable hot water heating. For domestic hot water systems requiring lead-free compliance, use the LF174A series.
What is the maximum operating temperature for this relief valve?
This valve is rated for a maximum operating temperature of 250°F (121°C), which is suitable for standard hydronic heating and high-temperature boiler 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.
Original: $2,934.34
-65%$2,934.34
$1,027.02Watts 0278450 Valve
The Watts 0278450 (model 174A-2-100) is a heavy-duty, ASME Section IV certified hot water pressure relief valve designed specifically for large-scale commercial and industrial boiler applications. With a massive relief capacity of 9,970,000 BTU/hr and a factory setting of 100 PSI, this 2-inch bronze valve provides critical overpressure protection for high-output heating systems. This model features NPT female inlet and outlet connections, a stainless steel spring, and a non-metallic disc-to-metal seating arrangement that prevents sticking and freezing even in harsh water conditions.
For contractors managing hydronic heating systems, the Watts 174A series is the industry standard for reliability. The bronze body construction and raised seat design ensure that sediment cannot collect around the seal, maintaining a tight shut-off and consistent boiler safety relief. This unit is often specified for commercial HVAC boiler maintenance where high-capacity relief valves are required to meet local mechanical codes. The 174A-2-100 is identical to the 0278450, ensuring a direct drop-in replacement for existing Watts 174A series installations.
Key Benefits:- High BTU Rating: Capable of handling up to 9,970,000 BTU/hr, making it suitable for high-output commercial boilers.
- Durable Construction: Features a rugged bronze body and stainless steel spring for long-term service in hot water space heating.
- Foul-Resistant Design: The seat is positioned above the drain to prevent water trapping and sediment interference.
- Automatic Reseating: Engineered for emergency safety relief with reliable automatic reseating after pressure normalization.
- ASME Certified: Built and tested to meet ASME Section IV requirements for heating boilers.
Is the Watts 0278450 the same as the 174A-2-100?
Yes, these part numbers are interchangeable. The 0278450 is the specific ordering code for the 2-inch 174A valve factory-set at 100 PSI.
Can this valve be used for potable water applications?
No, the standard 174A series is designed for non-potable hot water heating. For domestic hot water systems requiring lead-free compliance, use the LF174A series.
What is the maximum operating temperature for this relief valve?
This valve is rated for a maximum operating temperature of 250°F (121°C), which is suitable for standard hydronic heating and high-temperature boiler 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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Watts 0278450 (model 174A-2-100) is a heavy-duty, ASME Section IV certified hot water pressure relief valve designed specifically for large-scale commercial and industrial boiler applications. With a massive relief capacity of 9,970,000 BTU/hr and a factory setting of 100 PSI, this 2-inch bronze valve provides critical overpressure protection for high-output heating systems. This model features NPT female inlet and outlet connections, a stainless steel spring, and a non-metallic disc-to-metal seating arrangement that prevents sticking and freezing even in harsh water conditions.
For contractors managing hydronic heating systems, the Watts 174A series is the industry standard for reliability. The bronze body construction and raised seat design ensure that sediment cannot collect around the seal, maintaining a tight shut-off and consistent boiler safety relief. This unit is often specified for commercial HVAC boiler maintenance where high-capacity relief valves are required to meet local mechanical codes. The 174A-2-100 is identical to the 0278450, ensuring a direct drop-in replacement for existing Watts 174A series installations.
Key Benefits:- High BTU Rating: Capable of handling up to 9,970,000 BTU/hr, making it suitable for high-output commercial boilers.
- Durable Construction: Features a rugged bronze body and stainless steel spring for long-term service in hot water space heating.
- Foul-Resistant Design: The seat is positioned above the drain to prevent water trapping and sediment interference.
- Automatic Reseating: Engineered for emergency safety relief with reliable automatic reseating after pressure normalization.
- ASME Certified: Built and tested to meet ASME Section IV requirements for heating boilers.
Is the Watts 0278450 the same as the 174A-2-100?
Yes, these part numbers are interchangeable. The 0278450 is the specific ordering code for the 2-inch 174A valve factory-set at 100 PSI.
Can this valve be used for potable water applications?
No, the standard 174A series is designed for non-potable hot water heating. For domestic hot water systems requiring lead-free compliance, use the LF174A series.
What is the maximum operating temperature for this relief valve?
This valve is rated for a maximum operating temperature of 250°F (121°C), which is suitable for standard hydronic heating and high-temperature boiler 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.
