Sensus 143-3/4 Regulator

The Sensus 143-3/4 Gas Regulator is a robust solution designed for precise natural gas pressure regulation in residential and light commercial meter sets. This domestic service regulator features a 3/4" NPT pipe size and is equipped with a 3/8" orifice, optimized for high-capacity flow while maintaining stable downstream pressure. The internal green spring provides a versatile set point range of 6–14" w.c., making it ideal for standard low-pressure appliance requirements. Built for field durability, the 143-8 model series is recognized for its union nut connection, which allows for 360-degree diaphragm case rotation, simplifying installation in tight piping configurations. Whether utilized for LP gas systems or standard utility services, this Sensus gas regulator ensures consistent lock-up and relief performance to protect downstream equipment from overpressure conditions.

Technical Benefits for Contractors

• Versatile Mounting: The 360-degree rotation of the diaphragm housing allows for easy vent orientation in both horizontal and vertical piping runs.
• Precision Control: The 3/8 inch orifice balances flow capacity with sensitive pressure regulation to eliminate pilot flicker and appliance soot.
• Rugged Construction: Features a corrosion-resistant internal valve body and high-tensile strength components for commercial gas service longevity.
• Application Flexibility: Primarily used for natural gas, but fully compatible with dry propane gas applications when properly sized.

Common Questions & Installation Tips

What is the maximum inlet pressure for the 143-8 series?
While specific limits depend on orifice size, the 143-3/4 with a 3/8" orifice typically handles inlet pressures up to 125 PSIG, though local codes and specific Sensus 143-8 specifications should be verified for safety margins.

Can the green spring be swapped for higher pressure ranges?
Yes, the 143-8 series is field-serviceable. However, changing the spring to a different color (range) may require recalibration to ensure the water column inches output matches the appliance requirements.

How do I handle venting requirements for this regulator?
The regulator features a 3/4" NPT vent. For indoor installations, the vent must be piped to the atmosphere in accordance with NFPA 54 and local mechanical codes.

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.