Rain Bird VB-JMB-H rectangular jumbo valve box - 70 x 53 x 31 cm - lockable green lid

Rain Bird VB-JMB-H jumbo valve box for up to 8 irrigation valves

The Rain Bird VB-JMB-H is a spacious rectangular valve box designed for underground installation of irrigation valves and manifold assemblies. Depending on valve dimensions and installation layout, it can accommodate up to 8 solenoid valves. Its generous interior makes it particularly suitable for larger residential gardens, complex valve manifolds and professional irrigation systems.

The durable black housing protects installed irrigation components from soil, dirt and mechanical impact. Its lockable green lid blends naturally into lawns and landscaped areas while providing convenient access to valves, pipe connections and fittings for inspection and maintenance.

Reinforced construction with a lockable lid

The Rain Bird jumbo valve box features reinforced corrugated sidewalls and a wide base flange for improved stability and structural strength. The black housing is manufactured from 100% recycled high-density polyethylene (HDPE), providing a durable solution for long-term underground installation.

The green lid is secured with two hex-head locking bolts, washers and retaining clips. Beveled lid edges help minimize damage from lawn maintenance equipment. A practical access slot on the housing makes lid removal easier during maintenance. Preformed locking bolt openings remain closed until required, helping prevent dirt and insects from entering the enclosure.

Preformed pipe knockouts for flexible installation

The Rain Bird VB-JMB-H features two large preformed pipe knockouts located at opposite ends of the housing. These openings simplify pipe routing and reduce installation time, particularly when connecting larger irrigation manifolds.

Integrated knockout retainers allow removed sections to be repositioned above installed pipes, helping prevent soil and debris from entering during backfilling. Compatible jumbo extension sections are also available for installations requiring additional depth.

Spacious design for larger irrigation systems

With its generous dimensions, the Rain Bird VB-JMB-H is suitable for residential and commercial irrigation installations, larger lawn areas and complex valve manifold assemblies. Depending on valve size, pipe connections and manifold configuration, it can accommodate up to 8 irrigation valves.

Always allow sufficient clearance around fittings and connections to ensure convenient inspection, servicing and valve replacement. The spacious design makes it easier to maintain an organized and accessible underground irrigation system.

Technical specifications and dimensions

• Manufacturer: Rain Bird
• Model: VB-JMB-H
• Manufacturer part number: A11438
• Type: Rectangular jumbo valve box
• Valve capacity: Up to 8 irrigation valves, depending on configuration
• Lid: Green, lockable with hex-head bolts
• Locking system: 2 hex-head bolts with washers and retaining clips
• Housing: Black, made from 100% recycled HDPE
• Bottom external dimensions: 70.1 x 53.3 cm (L x W)
• Bottom internal dimensions (opening): 61.1 x 44.2 cm (L x W)
• Top external dimensions: 56.7 x 40.2 cm (L x W)
• Overall height: 30.7 cm
• Pipe knockouts: 2 large preformed openings at opposite ends
• Knockout dimensions: Approximately 20.0 cm high and up to 13.3 cm wide
• Reinforced corrugated sidewalls
• Beveled lid edges
• Access slot for convenient lid removal
• Integrated knockout retainers
• Compatible with matching jumbo extension sections

Frequently asked questions

How many irrigation valves fit inside the Rain Bird VB-JMB-H?

Depending on valve dimensions, manifold configuration and pipe layout, the valve box can accommodate up to 8 irrigation valves. Larger valves or extensive fittings may reduce the available capacity.

Does the valve box have a lockable lid?

Yes. The green lid is secured with two hex-head locking bolts, washers and retaining clips.

What pipe openings does the valve box provide?

The valve box features two large preformed pipe knockouts at opposite ends. Each opening is approximately 20 cm high and up to 13.3 cm wide. The usable pipe clearance depends on the position of the pipe within the opening.

Can the Rain Bird VB-JMB-H be installed in a lawn?

Yes. The valve box is designed for underground installation with the green lid remaining accessible at ground level for maintenance.

Can the jumbo valve box be extended?

Yes. Compatible Rain Bird jumbo extension sections are available for installations requiring additional depth.