NDS 115 Valve Box Extension (14" x 19" x 6")

What it solves (service-first)

• Buried lids: keeps access above mulch/topsoil so valves stay findable.
• Dirty boxes: overlapping lids help block dirt and grass from settling between lid and body.
• Cramped access: easier to service valves, control zone kits, and wiring without digging out the box every time.

Pro tip: pea gravel under the assembly

We like a pea gravel lining at the bottom of the box under the assembly. It’s not just about drainage—it makes the box a cleaner work environment and makes it easier to retrieve dropped screws (especially in a dark box).

Features & benefits (field notes)

• Protection: built to handle foot traffic and lawn care equipment.
• Structural ribs: added support to protect components housed inside.
• Overlapping cover: helps keep dirt and debris out and lids easier to remove later.
• ICV designation: helps identify irrigation control valve access points.

Product details (selected)

• Top inside dimension (ID): 10" x 15"; top outside (OD): 11-5/8" x 16-13/16"
• Bottom ID: 15" x 20"; bottom OD: 16" x 21"
• Box height: 6"; lid overall height: 2"

Related guides

• NDS standard size valve box (rectangular) (base access)
• NDS econo round valve box (smaller access)
• Irrigation Tune-Ups & Repairs
• Armada Pro900 locator (when boxes are already lost)

Reference links

• NDS 115 extension (example listing)