Used Fluid Pit DrainUsed Fluid Pit Drain 30 Gallon Pit drains are designed for track mounting in service pits or drive over applications. Two wheels extend from each side of the reservoir on axles that can be adjusted to fit varying track widths. Reservoirs have two opposing 3 4" NPT ports for connecting to an external evacuation pump and or for connecting multiple drains in tandem. All models feature heavy duty steel construction with internal baffles to reduce splash