The anti-siphon sprinkler nipple connects an Orbit sprinkler manifold system to a - or 1-inch PVC pipe. This nipple-style sprinkler adapter ensures watertight attachment to Orbit valve manifolds to PVC pipe for immediate lawn watering use. You do not need any special tools to attach this anti-siphon adapter. It easily connects by hand-tightening. For adapting an Orbit irrigation valve manifold to PVC pipe, this sprinkler nipple is an ideal, highly durable piece of equipment essential for lawn watering. Features and Benefits: Connects a - or 1-inch PVC pipe to an Orbit manifold water sprinkler system, Hand-tightens so no tools are required for attachment, Leaks are prevented with watertight O-rings, Durable construction ensures many years of yard irrigation use.