A septic system is one of the most expensive, yet least monitored and understood mechanical features of a property. Buried and hidden deep beneath the soil it quickly is forgotten. Only when the warning signs of septic system troubles begin to appear, do we remember it’s there, and that it needs to be maintained and monitored. Concrete septic tank riser rings can weigh hundreds of pounds, and are susceptible to deterioration from hydrogen sulfide gases. They can also be an unsightly fixture in your landscape. Our HDPE plastic septic tank riser rings, on the other hand, typically weigh less than 30 lbs. This makes installation easier, and provides confidence these will be there for the long haul. Supply your own cover, sealant, & mounting hardware. Specs and Features 23.5″ ID x 28.25" OD Material: HDPE Origin: USA Heights from 6″ to 50″ available Includes: Pipe Sections ≥18": Installation Instructions, Connector Flange with Safety Barrier, Pipe, 77" Butyl Sealant Pipe Sections 22"-37": Installation Instructions, Connector Flange with Safety Barrier, (2) Pipe Sections Pipe Sections 40"-50": Installation Instructions, (2) Connector Flanges, Safety Barrier, (3) Pipe Sections Durable Dual Wall Corrugated Pipe Supply your own cover, sealant, & mounting hardware. These corrugated pipe sections are manufactured from durable dual wall HDPE. This material won’t degrade and crumble like concrete riser pipe. Easier to work with than heavy concrete septic tank risers.Pipe Sections ≥22″ ship in multiple cartons & require assemblyAdditional sealant recommended for assembly of sections ≥22″ (P/N's 102601-102610) Looking for a complete riser package? Check out our other Amazon offerings. We manufacture complete riser kits which include all the items necessary to bring your access to grade. In addition, we can supply complete riser extension packages to raise an existing septic tank riser. Message us anytime to learn more! Looking for a complete riser package? Check out our other Amazon offerings. We manufacture complete riser kits which include all the items necessary to bring your access to grade. In addition, we can supply complete riser extension packages to raise an existing septic tank riser. Message us anytime to learn more!