Rain Bird PVBJMBEXT 6-Inch Jumbo Valve Box Extension

Rain Bird PVBJMBEXT 6-Inch Jumbo Valve Box Extension

Brand: Rain Bird | SKU: PVBJMBEXT

Product Overview

Raise access over a compatible PVB Jumbo valve box with the Rain Bird PVBJMBEXT extension. The black extension body and overlapping green lid can also form a shallow enclosure when the installation calls for the nominal 6-inch depth class. Choose it by the Jumbo footprint, not by height alone.

Key Features

• Fits the PVB Professional Series Jumbo extension application.
• Black plastic body with an overlapping green lid.
• Textured lid provides skid resistance.
• Shallow body can be used as an extension or as a nominal 6-inch-deep box.
• Made in the USA.

Common Uses

• Raising the access point over a compatible PVB Jumbo irrigation box.
• Providing shallow access to suitable subsurface irrigation components.

Technical Specifications

• Model: PVBJMBEXT; manufacturer part number A12512.
• Series: PVB Professional.
• Type: Jumbo extension body with lid.
• Nominal depth class: 6 inches.
• Body color: black; lid color: green.
• Lid style: overlapping, with skid-resistant texture.
• Material: plastic.
• Pipe slots: extension body does not have the molded pipe slots supplied on full-height boxes.
• Application: subsurface irrigation access in turf; not for roadway installation.
• Country of manufacture: USA.

Dimensions

• Manufacturer-listed nominal top opening: 21-3/8 in. L x 15-7/8 in. W.
• Manufacturer-listed nominal bottom opening: 22-15/16 in. L x 16-3/8 in. W.
• Manufacturer-listed nominal body height: 6-5/8 in.

Compatibility & Installation Notes

Use with the matching PVB Jumbo footprint. It is not the PVB Standard extension; similar depth does not establish interchangeable fit. Check the existing body, seating surfaces and lid clearance before installation.

Plan the final grade and seating support so the lid remains accessible. This is an access enclosure, not a sealed container; preserve the intended drainage and clearance around the irrigation components.

The nominal 6-inch extension class and the listed 6-5/8-inch body height are different descriptions. Confirm the actual seated height change when fitting it to an existing box. Do not use in roadways.

Frequently Asked Questions

Does PVBJMBEXT include a lid?

Yes. This model is the black Jumbo extension body with an overlapping green lid.

Does it fit the PVB Standard valve box?

It is specified for the PVB Jumbo series. Choose the matching Standard extension for a Standard box and confirm the seating dimensions before ordering.

Can it be used without a full-height box?

Rain Bird also lists the body for use as a shallow box in the nominal 6-inch depth class, when that depth and footprint suit the installation.

Does the extension have molded pipe slots?

No. Rain Bird distinguishes extension bodies from the full-height bodies that have molded pipe slots. Plan the pipe layout for the actual extension application.

Why Buy from Big Frog Supply?

Choose PVBJMBEXT when you need the PVB Jumbo extension footprint with an overlapping green lid, rather than a Standard-size riser or a lid-only part. The nominal 21-3/8 by 15-7/8-inch top opening and 6-5/8-inch body height help you check clearance for the intended shallow-box or raised-access installation.