Comparison : Item # 00578-0402, 78P Tee (Plastic x Female Pipe)
Item # 00578-0404, 78P Tee (Plastic x Female Pipe)
Item # 00578-0602, 78P Tee (Plastic x Female Pipe)
Item # 00578-0604, 78P Tee (Plastic x Female Pipe)
Item # 00578-0606, 78P Tee (Plastic x Female Pipe)