Valves are used in many aspects of an aircraft. Our selection of oil and fuel drain valves make sure you have the superior products you need at the best possible price. Monroe Aerospace is a stocking distributor of Aerospace and Mil-Spec hardware. We have an extensive inventory of Curtis and Safair drain valves. Every part that we sell is in Factory new (FN) condition and we provide our company’s certificate of conformance for all parts on every order. See below for our products.