If you have decided to install a new tub or remodel your old one, you may need to think about new drain connection. Plumbing connections on old houses are usually made from cast iron lead, or even clay pipes. These pipes crumble and wear out from years of use. Contemporary plumbing elements are made from lightweight plastic that will allow better flow, with less clogs.
- Skill level:
- Moderately Challenging
Things you need
- Chain wrench
- Pipe wrench
- Spray lubricant
- Plumber's putty
- Tub drain
- P-Trap kit
- 1 1/2 Inch PVC Straight sections
- 1 1/2 Inch PVC Elbow
- 1 1/2 Inch PVC 45 degree angle elbow
- PVC Glue and primer in one
- 1 1/2 Inch no-hub connectors (2)
- Socket wrench (for no-hub connectors)
Locate the access panel to the drain section of your tub. You won't need to do this if your wall is opened up for new installation. Remove the cover screw with a screwdriver or pry it off, if need be.
Apply a chain wrench to the old cast iron, lead or clay pipe and cut away the old drain. Do this near the tub drain and near the soil stack. A chain wrench has a section of chain that connects around the entire pipe and by use of a ratchet system, it slowly cuts through the old pipe.
Apply a pipe wrench to the old tub drain and remove the locking nut from below the tub. Use spray lubricant if needed.
Lift the top of the old tub drain up, from within the tub and remove it. Install a new tub drain from inside the tub. Push plumber's putty down and around the drain opening. Insert the top half of the drain down through the tub's drain hole. From below the tub, install the washer and place the drain nut onto the bottom threads of the drain.
Install new plumbing from below the tub. Connect the drain to a straight section of PVC pipe and then into a P-trap. Insert an elbow into the other side of the P-trap and then connect another straight piece of PVC pipe. You may need to use a 45 or a 90-degree elbow to get the proper angle to allow the pieces to fit together. All fittings are dry-fitted for now, which means they are not glued in place yet. Check local codes for exact plumbing drain requirements.
Glue all PVC pieces together after the dry-fit and alignment has been done
Install two no-hub connectors. One is installed at the soil pipe, where you cut off the old plumbing; the other no-hub connection is placed on the very end of the new PVC plumbing you just installed. Slide the no-hub rubber sleeve over the connection pipe. Insert the PVC section into the rubber. Place the metal no-hub band over the rubber. Tighten down with a socket wrench, specially designed for no-hub connections.
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