Watts 0158774 Valve
As a seasoned technician, you know that the Watts 0158774 is a workhorse in commercial water heating systems. This 3/4 inch T&P relief valve, specifically the 40XL-8-150 model, is engineered for automatic reseating and provides critical protection for hot water supply tanks. It features a heavy-duty bronze body construction and an 8-inch thermo-bonded coated thermostat designed for precise temperature and pressure protection. With a massive 1,437,600 BTU/hr CSA rating and a standard pressure setting of 150 psi at 210°F, this valve is built for high-demand environments where safety and reliability are non-negotiable. The MNPT inlet and FNPT outlet connections ensure a standard fit, and the non-mechanical seat-to-disc alignment prevents sticking, ensuring the valve functions perfectly during thermal expansion or over-pressure events. Note that this specific model (0158774) is intended for non-potable water applications and features tamper-resistant bonnet screws to maintain factory calibration in the field.
Key Benefits for Contractors:- High Capacity Thermal Relief: Rated at 1,437,600 BTU/hr, making it suitable for large-scale commercial water heaters.
- Automatic Reseating: Eliminates the need for manual intervention after a relief event, reducing maintenance calls.
- Advanced Thermostat Technology: The 8-inch extension probe features a unique thermo-bonded coating to prevent mineral buildup and ensure accurate sensing.
- Simplified Installation: Standard 3/4" MNPT x 3/4" FNPT threaded connections allow for quick integration into existing hot water outlet lines.
- Rugged Durability: The bronze body and stainless steel internal components resist corrosion in harsh mechanical room environments.
What is the difference between the 40L and 40XL models?
The 40L uses a short thermostat for direct tank tapping, while the Watts 40XL-8 features an extended 8-inch thermostat designed to be installed in the hot water outlet piping within the allowable distance from the tank top.
Can this valve be used in potable water systems?
No, the 0158774 is a non-lead-free model. For applications requiring compliance with the Safe Drinking Water Act (potable water), you must use the LF40XL series.
What is the significance of the 150 psi rating?
This is the pressure relief setpoint. The valve will automatically open to discharge water if the system pressure reaches 150 psi or if the temperature hits 210°F, protecting the tank from catastrophic failure.
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: $378.64
-65%$378.64
$132.52Watts 0158774 Valve
As a seasoned technician, you know that the Watts 0158774 is a workhorse in commercial water heating systems. This 3/4 inch T&P relief valve, specifically the 40XL-8-150 model, is engineered for automatic reseating and provides critical protection for hot water supply tanks. It features a heavy-duty bronze body construction and an 8-inch thermo-bonded coated thermostat designed for precise temperature and pressure protection. With a massive 1,437,600 BTU/hr CSA rating and a standard pressure setting of 150 psi at 210°F, this valve is built for high-demand environments where safety and reliability are non-negotiable. The MNPT inlet and FNPT outlet connections ensure a standard fit, and the non-mechanical seat-to-disc alignment prevents sticking, ensuring the valve functions perfectly during thermal expansion or over-pressure events. Note that this specific model (0158774) is intended for non-potable water applications and features tamper-resistant bonnet screws to maintain factory calibration in the field.
Key Benefits for Contractors:- High Capacity Thermal Relief: Rated at 1,437,600 BTU/hr, making it suitable for large-scale commercial water heaters.
- Automatic Reseating: Eliminates the need for manual intervention after a relief event, reducing maintenance calls.
- Advanced Thermostat Technology: The 8-inch extension probe features a unique thermo-bonded coating to prevent mineral buildup and ensure accurate sensing.
- Simplified Installation: Standard 3/4" MNPT x 3/4" FNPT threaded connections allow for quick integration into existing hot water outlet lines.
- Rugged Durability: The bronze body and stainless steel internal components resist corrosion in harsh mechanical room environments.
What is the difference between the 40L and 40XL models?
The 40L uses a short thermostat for direct tank tapping, while the Watts 40XL-8 features an extended 8-inch thermostat designed to be installed in the hot water outlet piping within the allowable distance from the tank top.
Can this valve be used in potable water systems?
No, the 0158774 is a non-lead-free model. For applications requiring compliance with the Safe Drinking Water Act (potable water), you must use the LF40XL series.
What is the significance of the 150 psi rating?
This is the pressure relief setpoint. The valve will automatically open to discharge water if the system pressure reaches 150 psi or if the temperature hits 210°F, protecting the tank from catastrophic failure.
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
As a seasoned technician, you know that the Watts 0158774 is a workhorse in commercial water heating systems. This 3/4 inch T&P relief valve, specifically the 40XL-8-150 model, is engineered for automatic reseating and provides critical protection for hot water supply tanks. It features a heavy-duty bronze body construction and an 8-inch thermo-bonded coated thermostat designed for precise temperature and pressure protection. With a massive 1,437,600 BTU/hr CSA rating and a standard pressure setting of 150 psi at 210°F, this valve is built for high-demand environments where safety and reliability are non-negotiable. The MNPT inlet and FNPT outlet connections ensure a standard fit, and the non-mechanical seat-to-disc alignment prevents sticking, ensuring the valve functions perfectly during thermal expansion or over-pressure events. Note that this specific model (0158774) is intended for non-potable water applications and features tamper-resistant bonnet screws to maintain factory calibration in the field.
Key Benefits for Contractors:- High Capacity Thermal Relief: Rated at 1,437,600 BTU/hr, making it suitable for large-scale commercial water heaters.
- Automatic Reseating: Eliminates the need for manual intervention after a relief event, reducing maintenance calls.
- Advanced Thermostat Technology: The 8-inch extension probe features a unique thermo-bonded coating to prevent mineral buildup and ensure accurate sensing.
- Simplified Installation: Standard 3/4" MNPT x 3/4" FNPT threaded connections allow for quick integration into existing hot water outlet lines.
- Rugged Durability: The bronze body and stainless steel internal components resist corrosion in harsh mechanical room environments.
What is the difference between the 40L and 40XL models?
The 40L uses a short thermostat for direct tank tapping, while the Watts 40XL-8 features an extended 8-inch thermostat designed to be installed in the hot water outlet piping within the allowable distance from the tank top.
Can this valve be used in potable water systems?
No, the 0158774 is a non-lead-free model. For applications requiring compliance with the Safe Drinking Water Act (potable water), you must use the LF40XL series.
What is the significance of the 150 psi rating?
This is the pressure relief setpoint. The valve will automatically open to discharge water if the system pressure reaches 150 psi or if the temperature hits 210°F, protecting the tank from catastrophic failure.
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.
