Auto Repair & DealershipDrainage Solutions

Auto repair service bays typically require Class C-rated trench drains (40,000 lbs) to handle vehicle loads. Stainless steel or cast iron grates are recommended for durability. The drain system must be chemical-resistant to withstand oil, coolant, and cleaning chemicals, and should connect to an oil-water separator before discharge.

Yes, most jurisdictions require oil-water separators for auto repair facilities. EPA regulations and local codes mandate that petroleum products be removed from wastewater before discharge. The separator size depends on the facility size, number of service bays, and local regulations. Regular maintenance and documentation are typically required for compliance.

Drainage around vehicle lifts should be positioned to capture fluid drips without interfering with lift operation. Trench drains are typically installed at the front and/or rear of lift bays, sloped away from the lift pit. Point drains can supplement trench systems for spot drainage. All drains must handle vehicle weight when driven over.

Dealership service drives require heavy-duty trench drains rated Class C or D to handle customer vehicles and service trucks. Drains should span the full width of the entrance to capture rainwater and prevent interior flooding. Heel-safe, ADA-compliant grates are essential for customer safety.

Service bay trench drains are typically 6" to 8" wide to handle vehicle fluids and wash water. Wider 12" channels may be used in high-volume areas or where large spills are likely. Pre-sloped channels like NDS Dura Slope ensure proper drainage in long runs without additional concrete work.

Ductile iron and stainless steel grates are preferred for automotive service areas. Ductile iron offers excellent load capacity at lower cost, while stainless steel provides superior corrosion resistance for wash bays. Both materials resist damage from dropped tools. Avoid polymer grates in service bays as they may crack under vehicle weight.

Auto shop drains should be cleaned weekly to prevent buildup of oils, sediment, and debris. Oil-water separators require pumping when the accumulated petroleum reaches a specified level, typically quarterly. More frequent cleaning may be needed in high-volume shops. Maintain records for regulatory compliance.

Car wash bays require high-capacity trench drains to handle large water volumes. Water reclaim systems are increasingly common and require compatible drainage design. Drains must resist soap and chemical exposure. Stainless steel systems are preferred for durability. Grates should be heel-safe for staff walking through the wash area.

Quick lube facilities with below-grade pits require specialized drainage to prevent oil accumulation. Pit drains should connect directly to oil-water separators. Secondary containment is often required. The floor area around pit openings needs perimeter drainage to prevent spills from spreading. Fire codes may have additional requirements.

Auto repair shops typically need plumbing permits for floor drain installation and may require environmental permits for oil-water separator systems. Industrial pretreatment permits may be required depending on facility size and local regulations. Contact your local building department, fire marshal, and environmental agency before design.