Description
The Dwyer A-331 Filter Vent Plug is a precision-engineered accessory designed to provide reliable venting for filter housings used in HVAC, instrumentation, and fluid handling systems. Manufactured by Dwyer Instruments — a trusted name in measurement and control products — this vent plug ensures proper air release and pressure equalization within filter assemblies, helping to maintain accurate system performance and extend filter service life.
Key Features
- Designed for use with compatible Dwyer filter housings and assemblies
- Allows controlled venting to prevent pressure buildup within filter bodies
- Compact, durable construction for long-lasting reliability
- Easy to install and service in the field
- Suitable for HVAC, instrumentation, and industrial fluid system applications
Applications
- Filter housing venting in HVAC systems
- Instrumentation and measurement equipment
- Industrial fluid and air handling systems
- Replacement or spare vent plug for Dwyer filter assemblies
Why Choose Dwyer?
Dwyer Instruments has been a leader in the design and manufacture of controls, sensors, and instrumentation for over 85 years. The A-331 Filter Vent Plug reflects Dwyer’s commitment to quality components that support accurate, efficient system operation. Trust Dwyer and Jackson Systems for genuine replacement parts and accessories.









