Nds 116 Valve Box Extension Overlapping Cover

Product Description

The NDS 116 is a valve box extension with an overlapping cover, designed to raise the effective depth of an existing valve box installation without replacing the base unit. It measures 14 inches by 19 inches by 6 inches, making it suitable for medium-to-large rectangular valve box assemblies. Irrigation technicians and landscape contractors use this component when valves or wiring connections require additional clearance below grade. The overlapping cover design helps keep debris, soil, and surface water out of the box cavity, protecting control valves and associated components from contamination and damage.

This extension is used in residential and light commercial irrigation systems where underground valve boxes need to be raised to meet finish grade or to provide additional working depth. It is a common solution during landscape renovation, regrading projects, or when adding valves to an existing manifold that sits deeper than the original box accommodates. The overlapping lid style is standard practice in underground valve box applications where a secure, flush-to-grade fit is required.

Key Features

• Extends existing rectangular valve box depth by 6 inches without requiring full box replacement
• Overlapping cover design seals the opening to reduce debris and water intrusion
• 14 x 19 x 6 inch footprint fits medium-to-large rectangular valve box bases
• Stacks onto compatible base units to achieve required grade height

Compatibility

Designed as an OEM-style extension for medium rectangular valve box systems measuring 14 inches by 19 inches at the opening. Verify base box opening dimensions before ordering to confirm fit.

Installation Notes

Installation is typically performed by irrigation technicians or landscape contractors. Shut off the irrigation system and relieve any line pressure before working inside the valve box. Set the extension onto the existing base unit and confirm the overlapping cover seats flush with the surrounding grade. Local codes may govern burial depth and box placement near potable water lines — consult applicable standards before backfilling.

Technical Specifications

• Length: 19 inches
• Width: 14 inches
• Height: 6 inches

Standard Information

• Brand: NDS
• Manufacturer Part Number: 116