Abstract: A universal channel drain fitting that allows an installer to easily and quickly modify the fitting to provide a plurality of fitting functions. The universal fitting has a base with base panel and a leg assembly. The base panel has a panel opening and the leg assembly has a plurality of upwardly extending legs. The base removably supports a top cap, a bottom cap, two end caps and two side caps that each have a plate section and a component section. The legs define a plurality of leg pairs that support the end caps and side caps, the plate section of which are slidably received in slots associated with each leg member. A top cap is secured to the leg assembly and a bottom cap is secured to the panel opening. The component sections block fluid flow or allow fluid to pass in a desired direction through the universal fitting.