The Carson Brooks Jumbo Valve Box Extension increases the depth of a compatible 1220 Jumbo enclosure when valves, manifolds or pipework need more vertical clearance. It expands the chamber without increasing its surface footprint.

Key details

• Extension section for the Carson Brooks 1220 Jumbo valve box
• HDPE construction for buried outdoor use
• Adds working space beneath the existing box and lid
• Useful where pipe depth or a taller valve assembly prevents a standard installation

This is the extension section only; the valve-box body, cover and internal equipment are not included unless expressly stated. Confirm the exact Carson model and finished installation depth before ordering. The completed box and cover combination is intended for light-duty, non-vehicular locations.