Maxitrol 13A31-50 Vent Protector

The Maxitrol 13A31-50 Vent Protector is a critical component for technicians installing gas regulators in outdoor environments. Featuring a 3/8" NPT connection, this regulator vent protector is the direct engineering replacement for the Maxitrol 13A15-5. It is purpose-built to maintain the atmospheric pressure reference required for proper diaphragm operation while shielding the vent orifice from blockage caused by freezing rain, snow, hail, or nesting insects. Specifically designed for use with Maxitrol 325-5, 325-5L, RV81, and 210D series regulators, the 13A31-50 ensures that the internal breather hole remains clear. In cold climates, moisture infiltration can lead to ice formation, potentially causing the regulator to fail in an open or closed position; this outdoor vent protector mitigates that risk. When mounting, ensure the regulator is positioned such that the 13A31-50 points downward to prevent gravity-fed debris accumulation, maintaining compliance with venting requirements for localized gas systems.

Key Benefits for Contactors

• Direct Replacement: Seamlessly replaces the legacy 13A15-5 model without requiring piping modifications.
• Extreme Weather Resilience: Engineered to prevent vent blockage from ice and snow, maintaining regulator stability during winter cycles.
• Broad Compatibility: Standardized for 3/8" NPT vent ports on Maxitrol 325-5AL and 210D series.
• Debris Shielding: Prevents insects and foreign matter from entering the upper diaphragm chamber.
• Rugged Construction: Durable materials designed to withstand UV exposure and temperature fluctuations in commercial or residential service.

Common Technical Questions

Is the 13A31-50 a substitute for a vent limiter?
No. A vent limiter is used for indoor installations to restrict gas escape in the event of a diaphragm rupture. The 13A31-50 is a vent protector specifically for outdoor installations to prevent environmental clogs.

Can this be mounted horizontally?
For maximum protection against rain and sleet, the regulator should be mounted with the 13A31-50 facing downward. If horizontal mounting is necessary, ensure the protector is shielded from direct water runoff.

Does this fit the Maxitrol 325-3?
The 13A31-50 features a 3/8" NPT thread. Always verify the vent port size on your specific regulator model, as smaller units like the 325-3 typically utilize the 1/8" NPT 13A15 protector.

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.