Looking for a heavy-duty lid for a big septic tank or grease trap opening? This 36-inch Seal-R cover is the biggest polyethylene one you'll find on the market. It's made from solid, high-density LDPE plastic, so it's tough but not crazy heavy. It has a slight dome shape (it's not flat, which helps with drainage) and a groove on the bottom that holds a foam seal to keep smells in and surface water out. It's designed specifically to fit on top of 36-inch N12 corrugated pipe (that pipe is measured by its inside dimension, by the way). The whole outside diameter is about 40 inches. The kit comes with everything you need: eight stainless steel lag bolts and washers to secure it right into the outer corrugation of the pipe. It's got a gloss finish and comes in green. Brenlin makes these in smaller sizes too (like 12, 15, 18, 24, and 30 inches) if you don't need the giant one. Perfect for pros or homeowners dealing with large access risers.
