Sensus 143-1 1/4 Regulator

The Sensus 143-1 1/4 Regulator is a job-ready domestic service gas pressure regulator engineered for residential and light commercial loads. This specific configuration features a 1.25-inch NPT straight body and a 3/8-inch orifice, optimized for precise flow control. Equipped with a green spring, it delivers a stable 6-14 inch w.c. outlet pressure range, essential for high-efficiency burners and unit heaters. The rugged cast iron body and die-cast aluminum spring case provide the durability required for outdoor installations, while the union nut connection allows for 360-degree orientation and simplifies field maintenance by allowing orifice changes without breaking the pipe schedule. With a 40 PSIG maximum inlet pressure rating and integrated internal relief valve (IRV), this unit ensures reliable overpressure protection across varied natural gas and LP applications.

• Enhanced Versatility: The union nut connection enables multi-position mounting and easy access to the 3/8-inch orifice for maintenance.
• Precision Control: The green loading spring provides a specific 6-14" w.c. range, minimizing pressure droop during peak demand.
• Robust Construction: Features a corrosion-resistant chromate conversion coating and Buna-N diaphragm for long-term reliability in harsh environments.
• Safety Integrated: Mechanical internal relief valve is set to trigger approximately 7-10" w.c. above the nominal set point for system protection.

What is the maximum inlet pressure for this 143-80 model?
This specific configuration with a 3/8-inch orifice is rated for a maximum inlet pressure of 40 PSIG. Always verify your upstream pressure before installation to prevent diaphragm damage.

Can this regulator be used for propane service?
Yes, the Sensus 143 series is compatible with natural gas, propane, air, and other non-corrosive gases. Ensure you apply the correct gravity correction factors when calculating capacity.

Does the 1.25" STD designation refer to the port size?
Yes, the 1.25" STD indicates a standard 1-1/4 inch NPT inlet/outlet connection, providing high-capacity throughput for commercial meter sets and boiler applications.

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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.