Septic Tank Lids, Risers & Accessories


Standard Features & Benefits

Our fiberglass access lids, PVC risers, and other septic tank accessories allow tank access without excavation. They're adaptable to virtually any septic tank, both new and existing. Lids and accessories fit Ultra-Rib and Perma-Loc PVC pipe. Pre-assembled risers and stock pipe lengths can be purchased from Orenco. Or stock lengths can be purchased locally and cut as needed. All components are designed to work well together.

Orenco's fiberglass access lids, risers and other accessories are superior in quality, watertight, non-corroding and lightweight yet strong.

Fiberglass Lids

  • Lids withstand 2,500-pound wheel loads, stronger than any other lid on the market.
  • Lids are fastened with stainless steel, tamper-resistant bolts (wrench included) to prevent accidental entry.
  • Lids are an attractive green and blend in with landscaping. (Custom colors are available on quantity orders.)
  • Lids are flat to allow placement of back yard furnishings. No unsightly domes, no tripping.
  • Lids are lightweight, watertight, non-skid, and non-corroding, Lid insulation and carbon filter vents are available options.
  • Lids come in multiple diameters and are easy-to-install using a variety of fasteners and adapters.

Risers & Accessories

  • Risers come in various diameters and can be cast right into a concrete tank or bolted down with a variety of adapters, for easy installation.
  • Adapter rings can also be cast right into a concrete tank.
  • Risers and adapters can be easily bonded to fiberglass tanks with a structural adhesive.
  • Grade rings allow installers to stack extensions onto risers, increasing riser height in the field.
  • Accessory items such as adhesive, pipe grommets, cord grips, splice boxes, insulation, vents, and fiber-glass brackets are available.

A Complete Package of Tank Accessories

Fiberglass Lids
Available in the following diameters: 18", 21", 24", 30", 48".

Lid Fastening Adapters
Gasketed RLA24 for 24" diameter shown.

PVC Risers
Available in the following diameters: 18", 21", 24", 30", 48". Perma-Loc or Ultra-Rib pipe. Can be installed with adapters or cast into concrete tank.

Tank Adapters
Flanged adapter shown. Available in 24" diameter. Can be cast into or bolted to concrete tank.

Bolt-Down Kits
For fastening tank adapter to tank. Kit includes stainless steel bolts, anchors, and butyl sealant.

Structural Adhesives
Three different types to choose from, depending on application. Single and two-component.

Tamper-Resistant Stainless
Steel Bolts

This stainless steel bolt is common to all lid fastening methods.

Other Lid Fastening Methods

PVC bolt Threaded
catch metal insert
(Perma-Loc) (Ultra-Rib)

Other Tank Adapters

Square RRFTA type adapter. Ideal for installation over square openings. RUBDKIT adapter. Used to bolt down Ultra-Rib riser.

Riser Extension Adapters
(Grade Rings)

These easy-to-install adapters allow height adjustments of risers in the field.