Add height to a valve box that sits deeper in the ground with the 14 in. X 19 in. Valve Box Extension and Cover. Half the height of a traditional valve box, the extension works as a riser and sits on top of an existing valve box or can be used alone in shallow installations to cover and protect valves, control zone kits, and other irrigation system components. Engineered with structural reinforcing ribs, the black extension box and green cover are built to stand up to the elements, pedestrian traffic, lawn care equipment, and potential vandalism. The overlapping lid blocks dirt and debris from entering the valve box to keep the area clean, and is marked for Irrigation Control Valve (ICV) use. Convenient slot makes lid easy to lift with a flathead screwdriver. The extension is made of high-density polyethylene (HDPE) using 100% recycled materials; the lid is made of polypropylene (PP) using a combination of virgin and recycled materials. Both the extension irrigation valve box and lid are treated with UV inhibitors to prevent fading and cracking from sun exposure. NDS is a leading manufacturer of water management solutions and the trusted brand of professional landscape contractors since 1972. Check out the NDS website or reach out to us for technical support—our friendly, experienced team is here to help make your project a success.
Stack on top of a valve box that sits deeper underground to add height, or use alone for shallow installations
Fits over valves, control zone kits, and other irrigation accessories; Structural reinforcing ribs provide support and strength to protect items housed inside against damage
Overlapping cover prevents dirt and debris from entering the box; ICV designation; slot on lid for easy lifting with flathead screwdriver
To use as an extension, stack on top of existing valve box; to use as a valve box, build valves, connect pipes; dig to allow enough depth so the lid is flush with the surface; add layer of gravel for drainage before putting box and cover in place
Extension box made of high-density polyethylene (HDPE) using 100% recycled content; Lid made of polypropylene (PP) using a combination of virgin and recycled content. Both treated with UV inhibitors to prevent fading and cracking
Box top inside dimension (ID) 10 inch X 15 inch; Box top outside dimension (OD) 11-3/4 inch X 13-1/4 inch; Box bottom ID 12 inch X 20-1/2 inch; Box bottom OD 17 inch X 21-3/4 inch
Box height is 6-3/4 inch; Shorter height than standard valve boxes enables stacking on a standard valve box for added height or as a standalone for shallow installations
Lid top dimension 11-3/4 inch X 16-13/16 inch; Lid bottom dimension 10-1/16 inch X 15-3/16 inch; rim thickness 1/4 inch; overall height 2 inch
Comes with one 14 inch X 19 inch rectangular valve box extension and cover