This is the official product video for the Norwesco 16 Inch Lid & Ring with Blue Snap-in Vent. Full specifications, dimensions, and live pricing are on the product page.
In the quiet drama of liquid and air... a single cover holds the balance. The N-63485 is a Norwesco 16-inch threaded lid and ring assembly in black polypropylene, fitted with a blue snap-in vent. It replaces or completes the manway opening on a poly tank, giving you a threaded cover you can hand-remove for inspection, gauging, or fill access. The vent lets the interior breathe as the liquid level rises and falls, so the headspace does not pull a vacuum or build pressure during normal use. Assembled footprint runs about 18 x 18 inches across the outer ring, with the lid sized to a 16-inch opening. It weighs roughly 4 pounds. N-63485 — Threaded. Ventilated. Secure. OneSource Plastics.