Abstract: A septic drainage system includes a vehicle that has a septic tank and the septic tank has an outlet. A hose is selectively fluidly coupled to the outlet. Thus, the hose may drain the septic tank. The hose has a distal end with respect to the outlet. The distal end may be fluidly coupled to an inlet of a sewer thereby facilitating the septic tank to drain into the sewer. A supporting unit is provided and the supporting unit may be positioned on a support surface. The hose is positioned on the supporting unit such that the hose is inhibited from becoming uncoupled from the outlet and the sewer. Thus, the supporting unit enhances draining the septic tank.