Watts 0369011 Relief Valve
For industrial-grade boiler safety and system integrity, the Watts 0369011 (LF474A) is a critical boiler pressure relief valve designed specifically for hot water heating systems. This 3/4-inch NPT female inlet valve is factory-calibrated to a 125# (125 PSI) set point, providing essential over-pressure protection for domestic supply boilers and commercial heating equipment. Built with a lead-free bronze body, the LF474A prevents the buildup of dangerous pressures through a high-capacity discharge rate of 1,700,000 BTU/Hr, ensuring compliance with ASME Section IV safety standards.
The Watts LF474A 125# features a non-metallic disc-to-metal seating arrangement that resists sticking and freezing even in corrosive water conditions. The 3/4 inch relief valve construction includes a stainless steel spring and an integrated test lever for manual inspection, which is necessary to confirm the waterways remain clear of sediment. As a veteran-preferred component for emergency safety relief, this valve utilizes an elevated seat design to isolate the working parts from the water flow, preventing mineral buildup and ensuring a reliable seal during normal operating cycles.
Key Benefits
- Broad Compatibility: Standard 3/4" female NPT connections fit a wide range of hot water boiler configurations.
- ASME Certified: Meets the rigorous safety requirements of the ASME Section IV code for low-pressure heating boilers.
- Lead-Free Construction: Fabricated with a lead-free alloy body to comply with modern safe-drinking-water standards.
- High Discharge Capacity: Rated for systems up to 1,700,000 BTU/Hr to safely manage thermal expansion and runaway firing.
- Durable Internal Components: Features a high-temperature resistant water seal and stainless steel spring for long-term field reliability.
Common Questions
Does this valve replace a standard 150 PSI T&P valve?
No. The LF474A is a pressure-only relief valve set at 125 PSI for boiler applications. It does not measure temperature and should only be used where a 125 PSI pressure relief rating is specified by the system design and local codes.
Can I install this on the cold water inlet?
This valve is intended for pressure protection on the heating supply side. Always install the relief valve according to the boiler manufacturer's specifications and ensure the discharge line is piped to a safe disposal point.
What is the BTU rating of the Watts 0369011?
This unit is rated for 1,700,000 BTU/Hr. To ensure safety, the BTU rating of your relief valve must always exceed the maximum BTU output of the boiler it is protecting.
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: $178.60
-65%$178.60
$62.51Watts 0369011 Relief Valve
For industrial-grade boiler safety and system integrity, the Watts 0369011 (LF474A) is a critical boiler pressure relief valve designed specifically for hot water heating systems. This 3/4-inch NPT female inlet valve is factory-calibrated to a 125# (125 PSI) set point, providing essential over-pressure protection for domestic supply boilers and commercial heating equipment. Built with a lead-free bronze body, the LF474A prevents the buildup of dangerous pressures through a high-capacity discharge rate of 1,700,000 BTU/Hr, ensuring compliance with ASME Section IV safety standards.
The Watts LF474A 125# features a non-metallic disc-to-metal seating arrangement that resists sticking and freezing even in corrosive water conditions. The 3/4 inch relief valve construction includes a stainless steel spring and an integrated test lever for manual inspection, which is necessary to confirm the waterways remain clear of sediment. As a veteran-preferred component for emergency safety relief, this valve utilizes an elevated seat design to isolate the working parts from the water flow, preventing mineral buildup and ensuring a reliable seal during normal operating cycles.
Key Benefits
- Broad Compatibility: Standard 3/4" female NPT connections fit a wide range of hot water boiler configurations.
- ASME Certified: Meets the rigorous safety requirements of the ASME Section IV code for low-pressure heating boilers.
- Lead-Free Construction: Fabricated with a lead-free alloy body to comply with modern safe-drinking-water standards.
- High Discharge Capacity: Rated for systems up to 1,700,000 BTU/Hr to safely manage thermal expansion and runaway firing.
- Durable Internal Components: Features a high-temperature resistant water seal and stainless steel spring for long-term field reliability.
Common Questions
Does this valve replace a standard 150 PSI T&P valve?
No. The LF474A is a pressure-only relief valve set at 125 PSI for boiler applications. It does not measure temperature and should only be used where a 125 PSI pressure relief rating is specified by the system design and local codes.
Can I install this on the cold water inlet?
This valve is intended for pressure protection on the heating supply side. Always install the relief valve according to the boiler manufacturer's specifications and ensure the discharge line is piped to a safe disposal point.
What is the BTU rating of the Watts 0369011?
This unit is rated for 1,700,000 BTU/Hr. To ensure safety, the BTU rating of your relief valve must always exceed the maximum BTU output of the boiler it is protecting.
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
For industrial-grade boiler safety and system integrity, the Watts 0369011 (LF474A) is a critical boiler pressure relief valve designed specifically for hot water heating systems. This 3/4-inch NPT female inlet valve is factory-calibrated to a 125# (125 PSI) set point, providing essential over-pressure protection for domestic supply boilers and commercial heating equipment. Built with a lead-free bronze body, the LF474A prevents the buildup of dangerous pressures through a high-capacity discharge rate of 1,700,000 BTU/Hr, ensuring compliance with ASME Section IV safety standards.
The Watts LF474A 125# features a non-metallic disc-to-metal seating arrangement that resists sticking and freezing even in corrosive water conditions. The 3/4 inch relief valve construction includes a stainless steel spring and an integrated test lever for manual inspection, which is necessary to confirm the waterways remain clear of sediment. As a veteran-preferred component for emergency safety relief, this valve utilizes an elevated seat design to isolate the working parts from the water flow, preventing mineral buildup and ensuring a reliable seal during normal operating cycles.
Key Benefits
- Broad Compatibility: Standard 3/4" female NPT connections fit a wide range of hot water boiler configurations.
- ASME Certified: Meets the rigorous safety requirements of the ASME Section IV code for low-pressure heating boilers.
- Lead-Free Construction: Fabricated with a lead-free alloy body to comply with modern safe-drinking-water standards.
- High Discharge Capacity: Rated for systems up to 1,700,000 BTU/Hr to safely manage thermal expansion and runaway firing.
- Durable Internal Components: Features a high-temperature resistant water seal and stainless steel spring for long-term field reliability.
Common Questions
Does this valve replace a standard 150 PSI T&P valve?
No. The LF474A is a pressure-only relief valve set at 125 PSI for boiler applications. It does not measure temperature and should only be used where a 125 PSI pressure relief rating is specified by the system design and local codes.
Can I install this on the cold water inlet?
This valve is intended for pressure protection on the heating supply side. Always install the relief valve according to the boiler manufacturer's specifications and ensure the discharge line is piped to a safe disposal point.
What is the BTU rating of the Watts 0369011?
This unit is rated for 1,700,000 BTU/Hr. To ensure safety, the BTU rating of your relief valve must always exceed the maximum BTU output of the boiler it is protecting.
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.
