- 1). Turn off the main water supply in the house. Cut into the main 3/4-inch hot and cold water-supply lines with a pipe cutter. Make the cuts as close to the location of the new faucet as possible. Have a bucket ready to catch water that will drain from the pipes.
- 2). Wait while water drains from the pipes, then scrub the cut-off ends with a wire brush. Spread flux on the outside of the pipes and on the inside of two copper 3/4-by-1/2-inch tees, using a flux brush. Slip the tees onto the pipes so that the 1/2-inch outlet is facing in the direction of the new faucet.
- 3). Light your propane torch. Apply the flame to the first joint to heat it until the flux turns black and starts to smoke. Touch the end of a coil of lead-free solder to the joint. Move it completely around the pipe while it melts; it will be drawn into the joint by capillary action, where it will harden and fuse the metal. Repeat for the remaining joints. Let the pipes cool.
- 4). Run 1/2-inch pipe to the wall behind the cabinet where the faucet will be located. Cut the pipe to fit and use couplings and elbows as needed.
- 5). Place a 90-degree elbow on the end of each pipe. Insert one more small length of pipe that stubs out about 2 inches from the wall. Place a threaded male adapter on the end of each pipe.
- 6). Apply flux to all the joints and solder them, one by one, using the same techniques as before.
- 7). Secure the pipes to the wall studs as needed to hold them securely. Place pipe clamps around the pipes and drive screws through the clamp holes and into the studs with your screwdriver. Secure the 90-degree elbows to the studs at the ends of the pipes that hold the stub-outs.
- 8). Wrap plumbing tape around the male adapters on the ends of the pipes. Screw on angle stops -- shut-off valves that allow you to turn off the water to the faucet -- with a pair of slip-lock pliers. Turn the angle stops to the "off" position. Turn the main water valve back on.
- 9). Insert the faucet through the appropriate hole or holes in the sink. Tighten the faucet to the sink with a basin wrench.
Connect the faucet to the angle stops with flexible hoses. Make sure they are long enough and have the right size connectors. Screw the end of one hose to the hot-water angle stop and its other end to the hot-water faucet stem. Repeat with the other hose for the cold-water connections. Tighten the connectors with slip-lock pliers.
Open the faucet handle(s) and turn the angle stops to "on." Let the water run for about a minute to allow air to escape, then turn off the faucet and check the connections for leaks. Tighten any connectors that leak with the slip-lock pliers.
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