The access to your septic tank, pump vault or holding tank should be easy, accessible and safe. The STF-APC24 series of covers offers a great solution for almost all systems. They fit our STF-R824B segmented riser as well as 24" culvert pipes and some other 24” risers.  They can be retrofitted to many existing systems. The STF-APC24 polycarbonate/ABS covers are the safest, strongest plastic covers to ever hit the market, with a wheel load rating of 8,000 lbs (Actual testing went to 20,000 lbs without failure). Our unique manufacturing process achieves extreme strength and durability, and is 3x thicker than most lightweight covers. Polycarbonate/ABS is used for its high strength and weather durability, and like no other cover we use a 2 component urethane finish for extended UV protection. This versatile cover is diamond plated and flat for easy foot traffic and lawn maintenance. It has 4 holes and 4 drillable dimples in two different hole patterns for universal fastening and the ability to fit multiple 24” diameter risers.  Safety information is printed on each cover.  A soft gasket provides a good seal on various surfaces and our positive drop-in feature assures proper cover and gasket placement and makes alignment and installation easy. The overlapping design keeps debris away from the access hole unlike recessed covers.  The riser can also be brought to the surface without the cover extending above grade like concrete risers and covers. Because of its rib-less design it is easily insulated with Styrofoam for cold climates.