Devices for separating oil, water or grease from sewage in drains leading to the main sewer

Full Title

Sewerage structures > Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates (for use in sewage purification plants or both in sewage purification plants or in sewer systems B01D, C02F ) > Devices for separating oil, water or grease from sewage in drains leading to the main sewer