DIY Fire Sprinkler Installation

Consult local building codes and the NFPA Standard 13 concerning the requirements for fire sprinkler installations. Submit your plans to the code department for approval. The plans usually contain drawings and specifications for the system's pipe runs, valves and sprinkler heads. Include at least one sprinkler in every room.

Start the installation in the basement of the home and work to the upper floors. Use chlorinated polyvinyl chloride (CPVC), which is more heat resistant than PVC pipe. Measure the piping for the fire sprinkler. Cut the material with a hacksaw.

Connect the line to the city water supply. Install a drain valve in the line, which allows for drainage of water from the line for maintenance and repairs. Run the pipe up between the floor joists. Make sure horizontal pipe runs slope back toward the drain. Some codes require a ¼-inch slope per linear foot of pipe. Follow the rules for pipe clearance from the ceiling and other specifications. Install pipe support straps.

Apply CPVC cement to secure pipe joints and fittings. Place a tee or elbow in the line where a pipe branches off for a sprinkler head connection. Install the pipes in accordance with local codes.

Cut a hole through the bottom plate of the wall. Use a hole saw with a slightly larger diameter than the CPVC pipe. Connect the pipe to the basement supply line. Extend the pipe up the stud.

Cut the hole in the studs near the top. Run the pipe horizontally to the location for the attachment of a sidewall sprinkler head. Attach an elbow and length of pipe and the fitting for connecting the sprinkler head. The sidewall sprinkler eliminates having to install piping in the ceiling.

Run pipe in the closet for the upper floor. Some regulations require the use of metal pipe when exposed. Extend the pipe to the attic. Run the supply line horizontally between the joists. Drop the pipe connection and attach the sprinkler head adapter.

Cut a hole in the ceiling and install the ceiling sprinkler head. Place a ceiling cap over the head to hide the sprinkler from view. Install fiberglass blanket insulation over supply pipes installed in unheated attics, which keeps them from freezing.