Air admittance kit with P-trap. Ideal for kitchen islands and new vanity installations. Allows venting when connection to existing vent is restricted. Schedule 20 design, connects to 1-1/2 Schedule 40 pipe. Includes Studor Redi-vent, which opens to admit fresh air when fixture discharges and then seals to prevent the escape of foul air. 45 elbow for offset applications is included. White.