Rectangular Extension Box 12" x 17" x 6"

The TigreUSA 12″ × 17″ × 6″ Rectangular Extension Box is a durable add-on enclosure designed to increase the depth of standard 12″ × 17″ valve boxes. Built from high-density polyethylene (HDPE), this extension box provides long-lasting protection and flexibility for irrigation, electrical, and water system installations.

Whether you’re adding extra valve capacity or accommodating deeper pipe runs, the 6″ extension securely stacks onto compatible TigreUSA valve boxes — offering a precise, stable fit and enhanced protection for underground utilities.

Key Features

• Stackable Design: Easily adds 6″ of depth to existing TigreUSA 12″ × 17″ valve boxes.
• Durable HDPE Construction: UV-resistant and corrosion-proof for maximum longevity.
• Interlocking Fit: Rigid walls and molded flanges ensure a secure, stable connection between sections.
• Light-Duty SCTE Rating: Suitable for pedestrian and landscape applications.
• Universal Compatibility: Fits all TigreUSA/Dura 12″ × 17″ bodies and lids.
• Easy Installation: Lightweight and designed for quick field assembly.
• Made in the USA: Manufactured by TigreUSA / Dura Plastics for consistent quality and performance.

Downloads:

• Valve Box Spec Sheet PDF
• Valve Box Catalog PDF