Flexible Sanitary Tee, 4" x 4" x 4", PVC Construction Fits Common Household Pipes Including Cast Iron, Steel, Plastic, Copper & Lead. Qwik Tees lets you make connections of all common household drain, waste and vent pipes quickly and easily without using special tools or fittings. Exceptionally flexible and extra long, it's the ideal replacement for fittings out at the joint during alteration or repair. Reducing sizes are made with separately supplied Qwik Bushings.