NDS STANDARD 6" ROUND OVERLAPPING COVER ONLY (FOR NON-POTABLE WATER):
The NDS STANDARD SERIES 6" round valve boxes and covers are injection molded of structural foam polyolefin material with a melt index between 10-12. Coloring and UV stabilizers are added, along with processing lubricants when needed. The 6" round cover shall have an average thickness of .187".
- Overlapping covers prevent dirt and grass from settling between body and cover
- UV inhibitors prevent discoloration and deterioration; such as cracking or blistering