75L Grease Trap | Kitchen Wastewater & Greywater Protection NZ75L Grease Trap The 75L Grease Trap is designed to capture fats, oils and grease (FOG) before they enter your greywater, septic or wastewater system. By separating grease from wastewater, it helps protect downstream filtration systems, reduce blockages and improve the long term performance of greywater recycling systems such as WaterMate. 75L Capacity Greywater Protection Septic Friendly Kitchen Wastewater FOG Management Freight Quote May Be Required