Genova Products 30190 PVC Slip Coupling, 2-1/2" PVC coupling Used to join lengths of pipe PVC Schedule 40 pressure fittings Ideal for cold water pressure applications Used in irrigation, underground residential sprinkler system, water service pipe, deionized water lines, swimming pool installations and some chemical drainage systems Meets ASTM D2467 INSIDE MEASUREMENT - 2-1/2" slip x 2-1/2" slip