Product Description
The NDS 118-6 is a jumbo valve box body extension designed to add depth to an existing professional-grade valve box installation. It fits between the base and lid of a compatible valve box assembly, giving installers the additional clearance needed to access valves, fittings, or manifolds buried at greater depths. This extension is a go-to component for irrigation and plumbing professionals who need to accommodate deeper installations without excavating or replacing the full valve box. Measuring 13 x 20 x 6 inches and weighing 6.47 pounds, it is sized for jumbo valve box configurations used in residential and light commercial landscapes.
This extension is used in underground irrigation systems, landscape plumbing installations, and other below-grade valve access applications. It is typically installed where soil settlement, grade changes, or deeper pipe runs have moved valves out of easy reach. Irrigation contractors and licensed plumbers are the primary installers. The jumbo footprint accommodates larger valve manifolds and multi-valve assemblies common in commercial or large residential irrigation zones.
Key Features
- Adds 6 inches of depth to a compatible jumbo valve box assembly
- Jumbo footprint at 13 x 20 inches accommodates large valve manifolds
- Designed as a body extension, not a standalone box — stacks between base and lid
- Lightweight construction at 6.47 pounds for easy handling and installation
- Professional-grade sizing suitable for residential and light commercial irrigation systems
Compatibility
Designed as an OEM-style body extension for professional jumbo valve box assemblies. Consult NDS fitment documentation to confirm compatibility with the specific valve box base and lid components in use.
Installation Notes
Installation is typically performed by irrigation contractors or licensed plumbers working on below-grade valve systems. Shut off the irrigation or water supply system before opening or modifying any valve box assembly. Ensure the extension is fully seated and aligned between the base and lid before backfilling to prevent shifting under soil load. Local plumbing and irrigation codes may govern minimum cover depth and access requirements for buried valve boxes.
Technical Specifications
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Length: 20 inches
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Width: 13 inches
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Height (Extension Depth): 6 inches
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Weight: 6.47 pounds
Standard Information
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Brand: NDS
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Manufacturer Part Number: 118-6
