Short Nipple - S Series Incorporating Fumoto's most compact ball valve, Fumoto's S series valves are designed to fit cars, light trucks, vans, and select commercial engines. The S series offers a short 5mm nipple which allows you to attach a hose for convenient draining. S series are designed especially for general automotive users concerned about low ground clearance. Constructed of forged brass and stainless steel to exacting Japanese specifications, S series valves are designed to provide a lifetime of dependable and reliable service. To use the S valve, simply attach a hose to the nipple or optional plastic socket and snap it onto the valve nipple.