Abstract: A vehicle for collecting and dewatering the contents of sanitary sewer traps. The vehicle includes a frame and an elongated tank mounted on the frame with the tank having a rearward end and a forward end. The frame includes a mechanism for elevating the forward end and the tank is pivotally connected to the frame adjacent the rearward end of the tank. A divider separates the tank into a rearward compartment for receiving the contents of the traps and a forward compartment, while a crossover pipe for conveying supernatant liquid from the rearward compartment to the forward compartment has a first leg extending generally parallel to the divider wall from a location adjacent the floor of the rearward compartment. An inlet conduit extends into the rearward compartment for conveying the contents of the traps into the rearward compartment. The vehicle also includes a pump for selectively establishing a subatmospheric pressure in either the rearward compartment or in the forward compartment.