Rain Bird VBSTD6EXTB Valve Box Extension Body 15 x 20 x 6 in

The Rain Bird VBSTD6EXTB is a 6-inch rectangular extension body engineered to add depth and installation flexibility to Rain Bird VB-series valve boxes. Made for professionals and property owners who need reliable subsurface access, this black extension body is built from UV-stabilized polypropylene to resist cracking and long-term weathering while providing a maintenance-friendly enclosure for valves and irrigation components.

• Nominal dimensions: Designed as a 6-inch extension; top opening approx. 15.3" L x 10.2" W; maximum footprint up to 20.0" L x 14.8" W; actual height ~6.8" (17.2 cm).
• Durable construction: Injection-molded, UV-stabilized polypropylene with corrugated sidewalls for strength before and after knock-outs are removed.
• Quick pipe placement: Easily removable knock-outs and knock-out retainers simplify conduit and pipe entry while helping keep dirt out during backfill.
• Stackable for depth: Interlocking bottom design allows secure bottom-to-bottom mating for deeper installations or custom stacking configurations.
• Service-friendly features: Shovel access slot and beveled lid edges make lid removal simple and help prevent damage from lawn equipment; a bolt-hole knockout helps exclude insects when a bolt is not used.
• Lid compatibility: Body is sold separately; designed to work with Rain Bird VB-series lids and standard VB bodies—confirm lid model before ordering.

Use the VBSTD6EXTB extension to adapt standard VB-series valve boxes for deeper valve pits, easier servicing, and flexible pipe routing. Refer to Rain Bird product documentation or the official model listing for full installation details, assembly options, and compatibility notes.