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Running New Supply Lines

Project Overview

Running New Supply Lines

Running new supply lines requires planning in order to choose the best route for the pipes and break the job down into manageable phases. Hot and cold supply lines can be either copper (as shown here), CPVC, or, if code allows, PEX.

5 Steps

  1. DRILL HOLES FOR THE RISERS
  2. INSTALL THE VALVE BODY
  3. INSTALL THE TOP BLOCKING
  4. SECURE SPOUT AND SHOWER RISER TO BLOCKING
  5. RUN SUPPLY LINES TO THE RISERS
DRILL HOLES FOR THE RISERS

Step 1

DRILL HOLES FOR THE RISERS

Drill holes for the risers. Drill riser holes through the stud wall into the basement. The diameter of the holes should be at least 1/4 inch larger than the diameter of the riser to allow some flexibility when hooking up the supply lines. The type of faucet you're installing will determine the spread and placement of the riser holes.

INSTALL THE VALVE BODY

Step 2

INSTALL THE VALVE BODY

Install the valve body. Make sure the faucet controls are centered and level. Do a dry assembly to make sure everything fits. The heat of soldering may damage the valve's internal parts; to prevent this, remove them if possible. If the valve attaches to a screw-in fitting, solder the first piece of pipe to the fitting before screwing the fitting to the valve.

INSTALL THE TOP BLOCKING

Step 3

INSTALL THE TOP BLOCKING

Install the top blocking. Blocking for a tub spout should be centered 6 inches above the top of the tub. Faucets installed more than 6 inches above the spout need separate blocking. The blocking should be level, at the correct depth inside the wall, and toenailed firmly to the studs. Blocking for the showerhead is usually about 6 1/2 feet above the floor, but you can adjust the height to suit your needs.

SECURE SPOUT AND SHOWER RISER TO BLOCKING
SECURE SPOUT AND SHOWER RISER TO BLOCKING

Step 4

SECURE SPOUT AND SHOWER RISER TO BLOCKING

Secure the spout and shower riser to the blocking. Connect all the pipes and fittings. Screw any brass fittings to the framing with brass screws to prevent the corrosion that occurs when dissimilar metals are in contact with each other.

RUN SUPPLY LINES TO THE RISERS

Step 5

RUN SUPPLY LINES TO THE RISERS

Run supply lines to the risers. Cut pipe lengths. Test-fit each supply line, and mark adjustments on the piping. Take the runs apart and make the changes. Anchor the pipes securely to the joists as you make the runs, and solder in place.

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Project Details

Skill Level: Beginner

Time: 1 hour

Before you start, read this »

Due to differing conditions, tools, and individual skills, The Home Depot® assumes no responsibility for any damages, injuries suffered, or losses incurred as a result of attempting to replicate any of the home improvement ideas portrayed in this website Before beginning any home improvement project, review it thoroughly to ensure you or your contractor can finish the project and if any doubts or questions remain, consult local experts or authorities. Because codes and regulations vary greatly, you always should check with authorities to ensure that your project complies with all applicable local codes and regulations. Always read and observe all of the safety precautions provided by any tool or equipment manufacturer, and follow all accepted safety procedures.

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