Concrete Risers
Concrete is wet cast for a smooth finish and a complete seal
Risers come with an optional PolyLok mandrel to clamp sewer discharge line, providing an excellent flexible seal with no gluing or grouting.
Extensions and Lids for existing Tanks / Risers
Most extensions we sell are either for a Duracon style riser, or are extensions for ones previously manufactured by Barkman Concrete. Barkman no longer manufactures septic products, and Duracon has taken over their product line. We make replacement lids for the Barkman style, and have an adapter from a Barkman riser to a Duracon riser. This requires a Duracon lid on top. Please use the chart below to determine which style you require.
Our Barkman to Duracon adapters are available in 6” and 12” height. You will need a new Duracon lid on top.
If you determine your existing riser is a Barkman, please specify when ordering. Your replacement will have a thicker wall than the original.
Please measure the Inside Diameter (ID) and the Outside Diameter (OD) to determine which type of riser or lid you need!
Barkman risers are 29 3/4” ID, 34” OD
Duracon standard replacement risers are 30” ID, 36” OD
