
Watts 0121243 Valve
The Watts LFN250B-Z3 is a 3/4-inch lead-free water pressure reducing valve designed for commercial and residential applications requiring precise downstream pressure regulation. Engineered with a bypass feature to handle thermal expansion, this direct-acting PRV maintains a stable secondary pressure despite fluctuations in the supply line. The LFN250B series is constructed with a lead-free copper silicon alloy body, ensuring compliance with potable water regulations. Technicians often specify this model for its high-capacity performance and ease of serviceability, as the replaceable poylmer seat module allows for internal maintenance without removing the valve from the piping system. It features a standard adjustment range of 25 to 75 psi, preset at 50 psi, and a sealed spring cage for installations in pits or outdoor enclosures where moisture is a concern. Integrating this water pressure regulator into your system protects plumbing components from excessive pressure-related wear while optimizing flow efficiency.
Key Benefits for Your Installation
- Internal Bypass Mechanism: Effectively manages thermal expansion pressure spikes, preventing system strain and protecting downstream fixtures.
- Lead-Free Design: Meets all federal and state requirements for low-lead compliance in potable water systems.
- Modular Seat Assembly: Simplifies field repairs with a cartridge-style seat that can be replaced without disturbing pipe connections.
- Environmental Protection: The sealed spring cage prevents corrosion and debris ingress, making it suitable for versatile mounting environments.
- Durable Construction: High-temperature reinforced EPDM diaphragm and stainless steel hardware ensure long-term reliability under heavy duty cycles.
Common Technical Questions
Does the LFN250B require a separate thermal expansion tank?
While the valve includes a bypass to alleviate pressure buildup back into the main, local codes and high-volume systems may still require an expansion tank. Always verify local plumbing regulations during installation.
What is the maximum inlet pressure rating for this 3/4 inch valve?
This model is rated for a maximum supply pressure of 300 psi, though it is optimized for high-capacity reduction within its standard set point range.
How do I adjust the outlet pressure on this Watts regulator?
Loosen the lock nut on the spring cage and turn the adjustment bolt clockwise to increase downstream pressure or counter-clockwise to decrease it, monitoring the change via a calibrated pressure gauge.
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: $537.54
-65%$537.54
$188.14Watts 0121243 Valve
The Watts LFN250B-Z3 is a 3/4-inch lead-free water pressure reducing valve designed for commercial and residential applications requiring precise downstream pressure regulation. Engineered with a bypass feature to handle thermal expansion, this direct-acting PRV maintains a stable secondary pressure despite fluctuations in the supply line. The LFN250B series is constructed with a lead-free copper silicon alloy body, ensuring compliance with potable water regulations. Technicians often specify this model for its high-capacity performance and ease of serviceability, as the replaceable poylmer seat module allows for internal maintenance without removing the valve from the piping system. It features a standard adjustment range of 25 to 75 psi, preset at 50 psi, and a sealed spring cage for installations in pits or outdoor enclosures where moisture is a concern. Integrating this water pressure regulator into your system protects plumbing components from excessive pressure-related wear while optimizing flow efficiency.
Key Benefits for Your Installation
- Internal Bypass Mechanism: Effectively manages thermal expansion pressure spikes, preventing system strain and protecting downstream fixtures.
- Lead-Free Design: Meets all federal and state requirements for low-lead compliance in potable water systems.
- Modular Seat Assembly: Simplifies field repairs with a cartridge-style seat that can be replaced without disturbing pipe connections.
- Environmental Protection: The sealed spring cage prevents corrosion and debris ingress, making it suitable for versatile mounting environments.
- Durable Construction: High-temperature reinforced EPDM diaphragm and stainless steel hardware ensure long-term reliability under heavy duty cycles.
Common Technical Questions
Does the LFN250B require a separate thermal expansion tank?
While the valve includes a bypass to alleviate pressure buildup back into the main, local codes and high-volume systems may still require an expansion tank. Always verify local plumbing regulations during installation.
What is the maximum inlet pressure rating for this 3/4 inch valve?
This model is rated for a maximum supply pressure of 300 psi, though it is optimized for high-capacity reduction within its standard set point range.
How do I adjust the outlet pressure on this Watts regulator?
Loosen the lock nut on the spring cage and turn the adjustment bolt clockwise to increase downstream pressure or counter-clockwise to decrease it, monitoring the change via a calibrated pressure gauge.
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
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Description
The Watts LFN250B-Z3 is a 3/4-inch lead-free water pressure reducing valve designed for commercial and residential applications requiring precise downstream pressure regulation. Engineered with a bypass feature to handle thermal expansion, this direct-acting PRV maintains a stable secondary pressure despite fluctuations in the supply line. The LFN250B series is constructed with a lead-free copper silicon alloy body, ensuring compliance with potable water regulations. Technicians often specify this model for its high-capacity performance and ease of serviceability, as the replaceable poylmer seat module allows for internal maintenance without removing the valve from the piping system. It features a standard adjustment range of 25 to 75 psi, preset at 50 psi, and a sealed spring cage for installations in pits or outdoor enclosures where moisture is a concern. Integrating this water pressure regulator into your system protects plumbing components from excessive pressure-related wear while optimizing flow efficiency.
Key Benefits for Your Installation
- Internal Bypass Mechanism: Effectively manages thermal expansion pressure spikes, preventing system strain and protecting downstream fixtures.
- Lead-Free Design: Meets all federal and state requirements for low-lead compliance in potable water systems.
- Modular Seat Assembly: Simplifies field repairs with a cartridge-style seat that can be replaced without disturbing pipe connections.
- Environmental Protection: The sealed spring cage prevents corrosion and debris ingress, making it suitable for versatile mounting environments.
- Durable Construction: High-temperature reinforced EPDM diaphragm and stainless steel hardware ensure long-term reliability under heavy duty cycles.
Common Technical Questions
Does the LFN250B require a separate thermal expansion tank?
While the valve includes a bypass to alleviate pressure buildup back into the main, local codes and high-volume systems may still require an expansion tank. Always verify local plumbing regulations during installation.
What is the maximum inlet pressure rating for this 3/4 inch valve?
This model is rated for a maximum supply pressure of 300 psi, though it is optimized for high-capacity reduction within its standard set point range.
How do I adjust the outlet pressure on this Watts regulator?
Loosen the lock nut on the spring cage and turn the adjustment bolt clockwise to increase downstream pressure or counter-clockwise to decrease it, monitoring the change via a calibrated pressure gauge.
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.












