A plastic article useful as a riser for a septic tank or as a water tank article is comprised of a multiplicity of plastic rings which are attached vertically to each other at joints. Ring pairs which alternately have inward and outward sloping conical walls nest within each other for ...
If the soil cover depth over the septic tank is more than a few inches (varying by jurisdiction) you should install a septic tank riser to permit easy and safe access to the septic tank cleanout openings. For a plastic septic tank the septic tank riser or wetwell and its cover will usu...