Check the listing for details. Hydro-Rain HRM 100 Swivel Coupling. Condition: New. Listed at 10.06 USD. Please Note: The unique 1" ID size make these HRM 100 fittings with buttress threads and swivels compatible with other HRM 100 manifold parts and Orbit valve manifold kits only. Blu-Lock and pipe thread connections will be noted in item descriptions. HRM 100 Swivel Coupling has double FBT (female buttress threads) swivel connections. Female Buttress Threads (FBT) provide quick and easy installation with leak proof seal when paired with HRM 100 manifold components. The coupling is used to join two manifold sections together to create additional manifold zones. The HRM 100 manifold components have a true 1" ID (inside diameter) and ultra smooth core to minimize friction and maximize flow.Do not use teflon tape, pipe dope or glue on buttress thread connections.Features:No primer/glue needed Hand tighten only - no tools required Hydro-Rain is the commercial division of Orbit so when you purchase a Hydro-Rain product, you will get all of the same reliability and product confidence you have come to expect from Orbit.