Solvent welds to O.D. of Schedule 40 pipe. No. 30155: 1/2" No. 30157: 3/4" No. 30158: 1" No. 30159: 1-1/4" No. 30151: 1-1/2" No. 30152: 2" No. 30153: 3" No. 30154: 4" NOTE: 3" and 4" have a dome-\