Resiglas Polyethylene Septic Tank is designed to receive and liquefy solids contained in WC waste water (toilets and urinals), and household waste water (Kitchen sink, bathroom, washing machine) due to an appropriate internal set up. RAIN WATER SHOULD NOT BE ALLOWED. A grease trap should be installed between the kitchen sink and this septic tank. The grease trap is designed to retain solids, grease and oils contained in kitchen waste water. If this septic tank is used for toilet and urinals only, the number of users can be increased as mentioned in the specification.