Industry standard description is 13 in x 20 in Jumbo Valve Box with overlapping cover. It is tapered so the top is gradually smaller than the bottom and actual size may be different to accommodate tapering and lip of valve box. Injection-molded of structural foam polyolefin for strength and durability.
A valve box is used to house sprinkler valves to protect them from rodents and standard wear and tear
Coloring and UV inhibitors are added along with processing lubricants when needed to prevent discoloration and deterioration such as cracking and blistering
The cover seat area has 16 structural support ribs on the underside of the seat
Overlapping covers prevent dirt and grass from settling between body and cover