Rain-Tight Steel EMT Compression Couplings are used in wet locations to connect the ends of two EMT thin wall conduits together to extend the raceway. The Rain-Tight Steel EMT Compression Couplings have been designed to comply with the new rain-tight test requirements along with the 2008 NEC 358.42 and 314.15 requirements. The steel construction ensures mechanical protection and the connection between one conduit to another. In damp locations, compression couplings are also of excellent corrosion protection with zinc electroplated. With labor saving design, electrician can quickly tighten these couplings on EMT conduits.