1115m² Clearwater Full Retention Oil Separator | NSFA020

The Clearwater Full Retention Oil Separator is designed to treat the entire flow generated by the connected drainage system, helping to prevent oil and hydrocarbons from entering the environment. Full retention separators are typically sized to accommodate flows generated by rainfall intensities of up to 65mm/hr, making them ideal for sites where a high level of environmental protection is required.

These separators are commonly installed in areas where there is a significant risk of oil contamination, including fuel handling sites, vehicle maintenance areas, distribution centres, and large commercial developments. In accordance with Environment Agency PPG3 Guidelines, all separators should be fitted with a robust monitoring system capable of providing both audible and visual alarms when oil levels become excessive.

Key Features & Benefits

• Full retention design treats the entire drainage flow
• Helps prevent oil pollution entering watercourses and drainage systems
• Lightweight construction for easier transportation and installation
• Integrated silt storage capacity
• Supplied with fitted inlet and outlet connectors
• Vent points incorporated within access necks
• Extension access shafts available for deeper invert installations
• Maintenance can be carried out from ground level
• Available in GRP or rotomoulded construction depending on model
• Designed to support compliance with environmental regulations

NSFA020 Specifications

• Model: NSFA020
• Material: GRP Chamber Construction
• Flow (l/s): 20
• Drainage Area (m²) PPG-3 (0.018): 1115
• Storage Capacity (L) Silt: 2000
• Storage Capacity (L) Oil: 200
• Length (mm): 3200
• Diameter (mm): 2010
• Manhole cover Dimensions (mm): 600
• Base Inlet Invert (mm): 1810
• Base to Outlet Invert (mm): 1760
• Min Inlet Invert (mm): 1000
• Standard Pipework Diameter (mm): 315

Typical Applications

• Garage Forecourts
• Car Parks
• Vehicle Workshops
• Supermarkets & Shopping Centres
• Distribution Warehouses
• Car Wash Bays
• Scrap Yards
• Vehicle Repair Garages
• Fuel Storage Sites
• Haulage & Distribution Centres
• Waste Transfer Stations
• Business Parks
• Commercial Developments
• Industrial Estates

Why Install a Full Retention Separator?

Full retention separators are recommended for sites where all surface water runoff must be treated before discharge. They provide an effective solution for separating oils and hydrocarbons from rainwater runoff, helping businesses comply with environmental regulations while protecting drainage infrastructure and local watercourses from contamination.

Alarm Requirements

Environment Agency PPG3 Guidelines recommend that all oil separators are fitted with a reliable alarm system capable of providing both visual and audible warnings when oil levels exceed acceptable limits. This helps ensure maintenance can be carried out promptly and minimises the risk of pollution incidents.