The NDS STANDARD SERIES 14" x 19" rectangular valve box's overlapping covers prevent dirt and grass from settling between body and cover. UV inhibitors are added to prevent discoloration and deterioration; such as cracking or blistering.
Above diagram is of the COVER ONLY
This diagram reflects the VALVE BOX (NDS-113BC) that the COVER fits. Valve BOX is NOT included with the COVER. Use these dimensions to determine if the COVER will properly fit your current valve BOX.