Customize your sprinkler system and build your own sprinkler valve system with Orbit's Heavy Duty 1 in. Female Adapter. The Orbit manifold system is the easiest way to assemble a sprinkler valve manifold. Manifold fittings are durable and UV resistant. The innovative swivel feature allows you to easily tighten or remove manifold parts. The free spinning swivel then can be used to tighten the manifold without causing misalignment.