The Hedstrom Envrionmental Septic Line is designed to eliminate riser systems. Poly 18- and 24-inch lids and adapter plates are retrofit for standard corrugated I.D. drainpipe. The square-to-round adapter plate allows for quick conversions of tank risers to corrugated pipe. Products are rotationally molded for strength with UV inhibitors to protect against color fade. Lids can be standard, ordered foam-filled, or can be filled with sand for additional strength. Gasket and safety screws come standard, along with optional custom nameplates displaying your company name and number. Safety nets are available upon request. 855/556-6755; www.hedstromenvironmental.com.