The Orbit 57184 green heavy-duty swivel coupler is perfect for connecting 2 or more valve manifolds together or to add another valve to an existing sprinkler manifold watering system. You can easily attach 2 or 3 together to make a 2-valve manifold or a 3-valve manifold. Sprinkler valve manifold assembly is simple with this double union coupler because you do not need tools to put it together. Simply hand-tighten the fittings to each water sprinkler valve and you are ready to water your garden or lawn. You do not need to read about how to build a sprinkler manifold because instructions are easy to understand assembly is quick and effortless. This Orbit 57184 sprinkler manifold coupler is built of UV-resistant, high-impact material that will last for many years of dependable yard watering. With O-rings at all connections, this valve manifold extender will be watertight to provide excellent garden irrigation coverage. Features and Benefits: Attaches 2 or more sprinkler manifolds together, No tools are needed for installation, All fittings hand-tighten to sprinkler valves easily, Watertight O-rings are present at all connections, UV-resistant construction ensures many years of lawn watering.