Watts 0121246 Valve

The Watts 0121246 is an industrial-grade lead free water pressure reducing valve engineered for precision regulation in high-demand plumbing systems. Specifically designated as the LFN250B-Z2-020, this 3/4-inch regulator is the direct technical successor to legacy models like the 0321987 and N250BZ-3/4-20. It features a rugged cast iron body and a stainless steel seat, ensuring durability under a maximum working pressure of 250 psi. Factory-calibrated to a 20 psi set point, this valve efficiently manages incoming line pressure to prevent fixture damage and excessive water noise. The thermal expansion bypass feature is critical for closed systems, allowing expanding water to recirculate and preventing the nuisance dripping of relief valves. With a stainless steel strainer integrated into the unitized design, it offers superior protection against pipe scale and debris while remaining fully serviceable in-line.

• System Protection: Reduces high incoming supply pressure of up to 250 psi to a stable 20 psi flow, protecting delicate valves and piping.
• Lead Free Performance: Constructed with lead-free materials to fulfill strict potable water safety requirements for contractor-led installations.
• Maintenance Efficiency: The unitized design permits all internal components to be serviced without disconnecting the iron body from the main line.
• Thermal Expansion Management: Includes an integral bypass that mitigates pressure spikes from water heaters, improving the longevity of the entire plumbing loop.
• Debris Filtration: Features a high-capacity integral strainer that keeps sediment out of the seat area to maintain consistent regulation.

What is the difference between the 0121246 and the 0321987?
The 0121246 is the current production standard, serving as the updated replacement for the 0321987. It maintains identical 3/4" NPT dimensions while utilizing modern lead-free construction materials and updated internal geometry for better flow characteristics.

Can the pressure be adjusted beyond the 20 psi factory setting?
Yes, while this specific unit is pre-set at 20 psi, the LFN250B series typically features an adjustable reduced pressure range of 25 to 75 psi. Note that 20 psi is a specialized low-pressure setting often required for specific residential or irrigation zones.

Is this regulator suitable for hot water lines?
This valve is equipped with a high-temperature resisting diaphragm, making it safe for both hot and cold water applications up to a maximum temperature of 160°F (71°C).

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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.