The round replacement septic tank top shown is 56 inches in diameter. The square replacement septic tank lid shown is 8 feet x 5 feet and both are 4 inches thick. We have a number of standard sizes available and can produce custom sizes upon request. All septic tank lids are reinforced with steel rebar and fiber for maximum durability.
Septic tank tops can be manufactured with lightweight aggregates or with a sand and gravel mix.