WEB3. From inside tub, install Drain Elbow through tub drain. Fig 1 4. Slip on Rubber Seal, Slip Washer and Nut, in that order, and tighten to tub. Fig 2 5. Solvent weld: Overflow Elbow, Sanitary Tee and schedule 40 pipe or flexible tubing. Fig 3 6. Install the Foam Washer up to the flange on the Overflow Elbow and install welded assembly through ...