To install a basement toilet, first install basement plumbing, assemble the toilet, and remove the knock-out flange. Install a wax ring in the flange and secure the toilet on the flange. You need locking pliers, closet bolts, nylon washers, nuts, a hacksaw and bolt caps.
- Install basement plumbing
Consult a plumber or your local public works department to determine sewer-line depth and flow rates, and install all required plumbing.
- Assemble new toilet
Assemble the new toilet according to the manufacturer's instructions.
- Remove the knock-out flange
Use a pair of locking pliers to remove the temporary lid covering the flange in the floor.
- Install the wax ring
Install a wax ring in the center of the flange, and make sure it's secure.
- Install closet bolts
Slide closet bolts into the slots on the outer rim of the flange. Secure nylon washers over each bolt.
- Secure the toilet over the flange
Lift the toilet, and place it over the flange and onto the closet bolts.
- Secure the bolts
Install additional washers and nuts over the closet bolts, and shorten the bolts with a hacksaw. Cover the bolts with decorative bolt caps.
- Attach the shut-off valve
Attach the shut-off valve to the water supply line, and then attach the line to the toilet.
- Install the toilet seat
Install the toilet seat as per the manufacturer's instructions.