Polypropylene Tank (45litre) with ribbed sides for added strength, plus the ribs will anchor the tank if it is partially concreted in place. The tank has a heavy duty polypropylene lid, which is strong enough to walk on. The full size lid provides full unhindered access into the trap for service. The unit has a easily removable basket, and partition wall, for cleaning. Overall size is 475mm dia x 420mm high. Connections are 40mm PVC sockets to suit a NZ std 40mm NB PVC waste pipe. If 110mm i.d. socket connections to suit std 100mm NB sewer pipe are required then deduct $40.00.