Purchase a new shower drain PVC pipe connector the same diameter size as the PVC pipe running to the shower. Purchase a new PVC pipe straight connector, elbow and a 6-inch piece of PVC pipe all the same diameter as the old PVC pipe used. Purchase caulk and PVC pipe cement.
Old Drain Removal
Turn of the main water supply in the basement. Unscrew the shower drain lid. Cut along the outside of the shower stall cutting the old caulk. Unscrew the hot and cold water knobs and the shower head in the shower. Pull the shower stall up off the shower drain to expose the floor below the shower and the hole in the floor exposing the PVC pipe in the rafters with the old shower drain PVC pipe connection. The shower drain connects to the top of the PVC elbow and the other side of the PVC elbow connects to the main PVC drain pipe. Cut 4 inches back on this main PVC pipe from the elbow's edge.
Install New Shower Drain
Apply PVC cement in both ends of the PVC straight connector. Place the PVC straight connector on the main PVC drain pipe. Push the 6-inch piece of PVC pipe into the other end. Apply PVC cement into both ends of the PVC elbow connector. Stick the elbow on the 6-inch PVC and face the elbow up. Place the PVC shower drain connector into the top of the elbow.
Install the Shower
Set the shower back in over the shower drain. Screw the shower drain lid back on the top of the drain in the shower. Re-screw on knobs and shower heads. Re-caulk around the outside of the shower. Allow the PVC cement and caulk to dry for several hours. Then, turn the main water supply back on.
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