Maxitrol 12A39 3/8 in. NPT Vent Limiter for 325-5A & 325-5AL Regulators

Maxitrol 12A39 3/8 in. NPT Vent Limiter for 325-5A & 325-5AL Regulators

Brand: Maxitrol | SKU: 12A39

Product Overview

The Maxitrol 12A39 is a certified vent-limiting accessory for compatible 325-5A and 325-5AL gas pressure regulators. In approved indoor installations, the vent limiter restricts the amount of gas that can escape through the regulator vent if the diaphragm fails, allowing an installation method that does not require conventional vent piping to the outdoors when permitted by the regulator instructions and applicable codes.

The 12A39 installs directly into the regulator’s 3/8-inch NPT vent connection. It is not an outdoor weather protector and should not be exposed to the environment. Maxitrol requires the regulator to be mounted horizontally upright when a vent-limiting device is used.

Key Features

• 3/8 in. NPT vent-limiting device
• For compatible Maxitrol 325-5A and 325-5AL regulators
• Designed for approved indoor installations
• Installs directly into the regulator vent connection
• Meets ANSI Z21.80 / CSA 6.66 requirements

Common Uses

Indoor compatible 325-5A/325-5AL regulator installations where a certified vent limiter is permitted in place of conventional vent piping.

Technical Specifications

• Part type: Vent limiter
• Connection: 3/8 in. NPT
• Compatible series: 325-5A and 325-5AL
• Application: Indoor

Compatibility & Installation Notes

Install only in regulators for which the device is certified and thread it directly into the regulator vent connection without intermediate pipe or fittings. When using a vent limiter, mount the regulator horizontally upright. Follow Maxitrol instructions and applicable gas codes.

Frequently Asked Questions

Is the 12A39 the same as a vent protector?

No. A vent limiter controls potential gas escapement in an approved indoor installation; a vent protector shields an outdoor atmospheric vent from weather and debris.

Can the 12A39 be used outdoors?

It should not be used where it will be exposed to the outdoor environment.

Why Buy From Big Frog Supply?

Choose Maxitrol 12A39 from Big Frog Supply when your compatible 325-5A or 325-5AL regulator installation specifically calls for the certified 3/8-inch vent-limiting accessory.