The 1 In. Transition Adapter connects 1" valves to Orbit's PVC slip or threaded adapters. The Orbit manifold system is the easiest way to assemble a sprinkler valve manifold. No special tools are required, just hand-tighten both ends of the adapter. Manifold fittings are durable and UV resistant.Connects a 1 In. valve to Orbit's 3/4 or 1 In. PVC slip or threaded adapters Connect, expand, or repair preassembled valve manifolds No special tools required Durable UV resistant and high-impact construction 1" MPT x 1-1/4" Buttress Thread