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Oil Stop Valve

The Oil Stop Valve protects waterways from oil or petroleum spills. The passive spill stop valve detects accumulations of oil and activates a valve that positively stops the flow of stormwater and oil upstream from the valve.

Technical information for this product is centrally located in the technical guides section.

View Technical Information

Protect Waterways from Oil Spills

The Oil Stop Valve protects waterways from oil or petroleum spills. The passive spill stop valve detects accumulations of oil and activates a valve that positively stops the flow of stormwater and oil upstream from the valve.

How the Oil Stop Valve Works

The Oil Stop Valve operates on the principles of buoyancy. A ballasted float, which is the only moving part, is weighted for a specified gravity, typically between 0.9 and 0.95. In water, the float will float and keep the valve open. An accumulation of oil around the float will decrease the buoyant force on the float causing it to float lower in the liquid. As the oil accumulation increases, the float will sink lower and finally close the valve when the oil level is approximately 3 to 4 inches thick.

Oil Stop Valve Construction

The Oil Stop Valve housing is fabricated from non-corrosive PVC (low risk of fire) or stainless steel (high risk of fire) to provide  greater design flexibility and pricing options. It is typically installed below ground and in-line with the piping system and can also be installed in pre-assembled concrete manhole or vault designs.

Oil Stop Valve Features and Benefits

  • Meets Spill Prevention Control and Counter Measures (SPCC) requirements
  • Works with existing storm drain pipes and structures for secondary containment
  • Passive design with stainless steel float
    • Dependable operation with long product life
    • No on-site operator required, only periodic inspections
    • No electrical power to operate
  • Slave valve makes maintenance easy
  • Self-opening feature mitigates effect of sump water evaporation
  • Standard valve sizes with fully adjustable float

Oil Stop Valve Applications

The Oil Stop Valve is used in applications where oil spills are possible but unpredictable, including:

  • Mining
  • Utilities
  • Transformer yards
  • Bulk oil tank farms
  • Crude oil production
  • Biodiesel processing
  • Commercial filling stations
  • Power plants
  • Auto part recyclers/salvage yards
  • Transportation  operations and maintenance:
    • Airports
    • Rail yards
    • Truck terminals
    • Marine terminals
    • Maintenance facilities
    • Military installations
    • Vehicle fleets 

The Contech Advantage


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Agency/Regulatory Guidance

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Solution Development

Our engineers can review your requirements, weigh all options, and recommend the optimal solution to integrate with your site designs.

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Technical Expertise

Our engineers assist by providing product specific engineering calculations such as hydraulics, buoyancy, foundation reactions, and unit sizing.

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Site Specific Drawings

Our engineers can provide site-specific drawings for proposals, project meetings, and submittals, helping you be more efficient with your time.

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On-site Assistance

Contractors know time is money, so we provide preconstruction meetings, delivery coordination, and on-site installation support to ensure a timely, smooth installation.