The Compression Outlet Brass Max Adapter can be used a 1/4 to 1/2 water line adapter, a 1/2 to 3/8 adapter for plumbing systems, a 1/4 to 3/8 water line adapter, as well as a 1/2 to 3/8 faucet adapter. Its versatility allows it to be used in various plumbing projects.