The rectangular valve box is designed to protect manual and automatic irrigation control valves, as well as meters, filters, and quick coupler valves. It is constructed from high-density polyethylene (HDPE) which enables it to stand up to UV, freezing and lawn equipment. Mousehole-shaped openings in the bottom of the box allow up to 2-in. pipe to pass through without cutting. The reinforced lid snaps securely onto the box. We recommend using the optional valve box base with the standard valve box, installing the valve box lid at grade level, and applying gravel beneath the base to promote drainage and prevent settling. Compatible with Orbit’s preassembled manifold system and components, as well as valves, filters, pipes, and fittings from Orbit, Hydro-Rain, and other major brands. For outdoor irrigation use with cold water only.