4" Replacement Strainer for use with Philadelphia Style Vent Box

Fox Foundry 4005 4" Vent Box Strainer – Cast Iron Replacement for Philadelphia Style Vent

The Fox Foundry 4005 is a 4-inch cast iron replacement strainer designed for use with Philadelphia Style vent boxes. Manufactured for durability and fitment consistency, this component includes integral baffles and an overlapping lug with a screw-locking design to ensure secure placement and functional airflow control in vented systems.

Commonly used in commercial and industrial drainage and venting systems, the strainer maintains debris exclusion while allowing unobstructed ventilation. Its heavy-duty construction supports long-term performance in harsh site environments.

Product Features

• Nominal Size: 4-inch strainer for Philadelphia Style vent box assemblies
• Outer Diameter: 6 inches
• Thickness: 3/4 inch
• Construction: One-piece cast iron body for structural stability and wear resistance
• Baffle Design: Integrated cast baffles for effective air passage and foreign object prevention
• Mounting Mechanism: Overlapping lug with screw-secured retention

Technical Specifications

• Material: Cast iron
• Compatibility: Designed specifically for Philadelphia Style vent boxes
• Installation: Surface-mounted with screw-lock engagement

Installation Notes

Install the strainer by aligning it with the vent box opening and securing it using the integrated lug and fastener. Inspect seating for proper engagement and verify that baffle orientation supports intended airflow direction. Installation is typically completed with basic hand tools, and the strainer is field-replaceable without modification to the vent box body.

• Recommended Tools: Screwdriver or nut driver for securing fastener
• Maintenance: Periodic inspection and debris clearing recommended
• Intended Use: Commercial, industrial, or municipal venting systems utilizing Philadelphia Style castings