This optional kit converts the JDI-LP4 into a self-evacuating drain. Using regular shop air, easily transfer oil from the drain to your storage tank.; Kit includes: 7 psi fixed air regulator; Safety relief valve; 10′ evacuation hose; 3/4″ male quick disconnect coupler; 3/4″ female quick disconnect coupler; 2″ drain plug; Air Regulator & Safety Relief Valve; The fixed 7 psi air regulator allows the proper amount of compressed air to enter the drain during the evacuation process while the safety relief valve prevents over-pressurizing the reservoir.; Quick Disconnect Evacuation Hose; The 10′ evacuation hose includes a quick disconnect coupler making the evacuation process clean and easy.