• Automotive workshops
  • Car washes
  • Mechanical workshops
  • Service stations
  • Transport depots
  • Truck washes
  • Vehicle detailing facilities

A petrol and oil interceptor, sometimes known as a triple interceptor, is designed to contain and slow the flow of contaminated waste water.  The interceptor allows suspended grease, oil and traces of fuel and solvents to float to the top while solids settle to the bottom and cleaner water flows out to sewer.

A petrol and oil interceptor must be evacuated and cleaned at regular intervals by an approved trade waste collection contractor.  This typically should occur 3-4 times a year depending upon usage.

Used extensively in the automotive industry, petrol and oil interceptors are often installed downstream of a silt pit which contains a straining basket to collect dirt and grit before it enters the interceptor. Above ground petrol and oil interceptors may also require a pump tank to be installed between the silt pit and interceptor. The pump tank is used to pump the trade waste up to the level of the interceptor.

What size interceptor will my business need?

In general, the capacity of a petrol and oil interceptor needs to be sufficient to hold contaminated waste water for at least one hour before being discharged to sewer.

The appropriate size, or capacity, interceptor will be nominated by your local water authority under your trade waste agreement. You will need to contact your local water authority so they can determine the capacity applicable to your application. To find your local water authority, click here.

Capacity: 600 litres – 2000 litres

  • Where there are space limitations, an equivalent capacity petrol and oil interceptor can be custom made to fit the available space
  • Larger capacity units are available by special order

Above Ground Petrol and Oil Interceptor

  • quick-release-airtight-covers
    Quick release air-tight covers

    Fabricated from 6mm polyethylene for above ground installations

  • Fitted with an external 50x50mm galvanised steel tube support frame for sturdiness
  • Fitted with 100mm inlet, outlet and vent plain pipe fittings and threaded drain nipple
  • Pipe fittings are fully welded for superior seals
  • Quick release, circular screw-in, air-tight, access lids provide easy access for cleaning

Below Ground Petrol and Oil Interceptor

  • below-ground-petrol-oil-interceptor
    Below ground petrol and oil interceptor

    Fabricated from 6mm polyethylene for below ground applications.  These tanks must be surrounded with 100mm thick (minimum) concrete walls and base.

  • Fitted with 100mm inlet, outlet and vent plain pipe fittings
  • Pipe fittings are fully welded for superior seals
  • Full height keying strips provide better binding of the plastic to the poured concrete, stiffening of the interceptor and include holes to feed the Y12 reinforcing bars through to provide better binding of the steel reinforcement in the poured concrete
  • External 50mm flat rim flange around the top of the interceptor provides a better binding surface between the interceptor and poured concrete and a level contact area for the access cover/s to seat
  • Access covers (sold separately) capable of being removed by one man should be fitted on top for easy access for tank cleaning
  • Concrete- infill-access-cover
    Concrete in-fill access cover

    Access covers ( sold separately) are available in various types (concrete in-fill, solid top or tiling edge), numerous sizes and several weight loadings (pedestrian, car or truck)

Related Products

Covers (Concrete In-Fill, Solid Top, Tiling Edge)

Silt Pit

Pump Tank