Rain Bird Maxi Jumbo Valve Box VB-MAX-H - 40.3 x 27.1 x 18 in - VB-MAX-H
The Rain Bird VB-MAX-H Maxi Jumbo Valve Box protects large in-ground irrigation valves and multiple components while providing fast, contractor-friendly access for maintenance and service.
Built for turf, commercial, and large residential irrigation installations, the VB-MAX-H simplifies installation and long-term service while protecting buried components. Refer to the VB Series brochure for technical drawings, load guidance, and installation instructions.
Features
- Extra-large rectangular enclosure: 40.3 in L × 27.1 in W × 18 in H provides ample room for multiple valves, manifolds, and accessories.
- Multiple opening sizes: standard top opening 29.4" × 16.4" and bottom 35.1" × 21.9"; maximum top 34.4" × 21.1" and maximum bottom 40.4" × 27.1" for flexible piping layouts.
- Durable polypropylene construction (black body) with a green lift-off lid designed to retain horizontal and vertical integrity under load and resist soil and moisture.
- 18 pre-molded knockouts (various sizes) plus a bolt-hole knock-out; knockouts slide back into place to keep out dirt during backfill and speed pipe placement.
- Includes two hex head locking bolts with washers and clips and a side shovel-access slot for quick, tool-assisted lid removal.
- Wide flange base and corrugated sides minimize sinking and protect valves from compression and impact from turf maintenance equipment.
What our Experts Think
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Max protection for critical irrigation hardware: The Rain Bird VB-MAX-H Maxi Jumbo Valve Box is engineered to house and protect large valve manifolds, flow components, and wiring in high-value irrigation systems.
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Extra-large service space: Internal footprint of approximately 40.3" × 27.1" × 18" provides generous working room for multi-valve assemblies and accessories.
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Heavy-duty structural design: High-strength polypropylene body with reinforced walls and a rigid frame prevents collapse under soil load and turf traffic.
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Commercial-grade durability: Built for long-term underground installation in golf courses, sports fields, estates, and municipal irrigation networks.
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Maintenance-friendly access: Wide top opening and removable lid design allow fast inspection, servicing, and valve replacement without disturbing surrounding piping.
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Knockout flexibility: Pre-molded side and end knockouts simplify pipe routing and reduce installation time for complex manifolds.
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Load-resistant lid system: Locking lid helps secure internal components against accidental displacement and external impact from landscaping equipment.
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System scalability enabler: Commonly used when multiple valves, sensors, or decoders must be grouped in a single protected enclosure.
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Trade-off reality: Very large footprint—requires careful placement planning and is overbuilt for small residential irrigation systems.
Q&A
Maintenance Tips
- Extra-large commercial irrigation valve box for protecting buried valves and manifolds
- Dimensions: 40.3" L × 27.1" W × 18" H (max bottom opening approx. 40.4" × 27.1")
- Heavy-duty polypropylene construction with black body and green lift-off lid
- Designed to house multiple valves, manifolds, and irrigation components in one enclosure
- Wide flange base and reinforced corrugated sides for load resistance and ground stability
- Includes knockouts for pipe entry to simplify installation and routing
- Double-locking lid system for security and service protection
- Used in commercial landscapes, sports fields, golf courses, and large irrigation systems
- Provides easy maintenance access while protecting against soil, debris, and equipment damage
Damage 
Loss 
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