The NDS Standard Series 6 in round valve boxes and covers are injection molded of structural foam polyolefin material.
- 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 features 6 structural support ribs on the underside of the seat
- Overlapping covers prevent dirt and grass from settling between body and cover