In-Ground Grease Traps

In-Ground Grease Trap Cleaning Melbourne In-ground grease traps are the workhorses of Melbourne’s busiest commercial kitchens. Buried beneath or adjacent to food premises, these large-capacity traps handle the highest volumes of fats, oils, and grease (FOG) and require professional vacuum tanker equipment for proper cleaning. We pass in-ground grease trap enquiries of all sizes from across the Melbourne metropolitan area to local contractors.

What Are In-Ground Grease Traps? In-ground grease traps are installed below ground level, typically in car parks, courtyards, or service areas adjacent to commercial kitchens. They are designed to handle large volumes of FOG-laden wastewater and are the preferred choice for high-output food operations. Their subsurface installation means they don’t take up valuable kitchen floor space, but they do require specialised access for cleaning and maintenance.

Key Specifications Capacity: 1,000 to 5,000+ litres, sized according to kitchen output and AS 4494 calculations Materials: Concrete, fibreglass, or heavy-duty plastic construction Best suited for: High-volume restaurants, food courts, hotels, hospitals, and food manufacturing facilities Cleaning frequency: Monthly to bi-monthly, depending on kitchen output and Trade Waste Agreement conditions Australian Standard: AS 4494 — Domestic and Commercial Grease Traps The In-Ground Trap Cleaning Process Access and setup: The technician locates and opens all access lids, sets up vacuum tanker hoses, and prepares the work area. Full pump-out: All FOG, sludge, settled solids, and wastewater are removed using a vacuum tanker. High-pressure cleaning: Internal walls, baffles, and chambers are cleaned with high-pressure water to remove adhered grease. Structural inspection: The technician checks for cracks, root intrusion, baffle damage, and deterioration of concrete or fibreglass. Inlet/outlet inspection: Connecting pipes are inspected for blockages, grease buildup, and structural damage. Documentation: Waste Transport Certificate and service report issued on-site, with photographic evidence. Common Issues with In-Ground Traps In-ground traps face unique challenges due to their subsurface installation. Root intrusion from nearby trees can crack chambers and block pipes. Concrete traps can deteriorate over time, with acidic FOG eroding walls and baffles. Ground movement and heavy vehicle traffic over buried traps can cause structural cracking. A good technician checks for these issues during every service and recommends repairs early.

EPA & Water Authority Compliance In-ground grease traps must comply with EPA Victoria’s IWRG421 guidelines and your water authority’s Trade Waste Agreement conditions. The 25% FOG accumulation rule applies — if grease levels exceed 25% of the trap’s depth, immediate cleaning is required. Ask for all necessary Waste Transport Certificates and compliance documentation to keep your records audit-ready for City West Water, South East Water, or Yarra Valley Water inspections.

Book your in-ground grease trap cleaning today. We take enquiries from all Melbourne suburbs.