The Infiltrator IM-1060 is a lightweight, strong and durable septic tank ideal for rainwater, pump or septic functions. The injection-molded model offers long-term strength and is available with custom-fit risers and heavy-duty lids. The mid-seam joint accepts an engineered EPDM gasket, eliminating seepage. Tanks can be installed with 6 to 48 in. of cover and can be pumped dry during pump-outs.