Concrete Septic Top Information Page

What is a septic top and why do I need one?  A septic top or riser allows you to easily locate the tank and provide access to the tank for inspection and maintenance. Your don't need to search for the tank (which can be quite difficult and time consuming) or pay a contractor to find it. Risers also prevent you from having to dig up the lawn each time you need to access the septic tank. Some localities also require risers on new and/or older septic systems.  Risers are attached to the top of the tank over the outlet and inlet openings of the tank (or the pump-out opening) and they extend to ground level. Risers can also be installed to allow access to other system components such as distribution boxes.  Different types of risers: There are three different types of risers or tops, concrete, PVC and high-density polyethylene. A concrete septic top is quite heavy, making it difficult to install. Their lids are also heavy, making it hard to lift and access the septic tank. Backhoes are normally needed to install concrete risers. Some people find the lids unsightly and difficult to mow around. Concrete risers are also not completely waterproof, and problems can occur if surface or ground water leaks into the tank. PVC risers are easy to install and have light fiberglass lids that allow for easy access to the tank. PVC risers also have gaskets and are waterproof, and fasten easily to tanks. Polyethylene risers are difficult to connect securely to the tank, because most adhesives do not bond to polyethylene. The lids one these risers are also not as strong as fiberglass, requiring them to be domed to add strength. This causes the lids to stick above grade.  How much do risers cost?  The cost of a riser depends on the type used, diameter and height. Estimated costs are: Concrete: $50-100 PVC: $150-225 Polyethylene: $100-200 For more information on septic tank maintenance, go to http://www.laundry-alternative.com/septic_system_maintenance.htm