Easy Connection Buttress Threads and deep socket connections with glue traps make the Magic Union Fittings reliable and leak free. In addition, Magic Plastics’ Unions have a built in locking feature to assure the Union will not accidentally back out should vibration occur. Contact the factory for additional details and specifications. Magic Union Fittings are available in a variety of configurations in 1½?, 2? and 2½? IPS sizes.