USING FITTINGS ON PIPE RUNS
In a building, install pipe runs with fittings to join and change the direction of the water flow. The fittings-to-pipe connections must be leakproof.
Preparing Tube Joints.
- Apply compound to pipe threads only.
- Screw the fitting clockwise by hand.
- Tighten with a pipe wrench (wipe off excess compound).
Preparing Joints for Copper Fittings.
The various types of copper tubing fittings for soldered and flared joints are shown below.
Preparing Copper Tube Joints (Rigid).
- Flux completely around the outside end of the tubing and the inside end of the fitting.
- Place fitting on tubing. Use a quarter turn to spread the flux evenly.
- Heat fitting with a torch until flux bubbles. Place solder on the connection until beads form completely around the edge of the fitting.
- Clean the joint with a wet cool rag.
- Place flange nut over the cut end of tubing with threads facing the cut end; then flare the tubing at the cut end.
- Screw the flange nut on the fitting by hand.
- Tighten the screw using two wrenches, one on the fitting and one on the flange nut.
Preparing Copper Tube Fittings (Flexible).
- Insure tubing is cut square.
- Slide compression nut and ring onto tubing. SLIDE fitting onto tubing.
- Hold compression nut and ring against the fitting and turn the nut clockwise until it holds.
- Tighten the compression joint with wrenches, using one wrench on the nut and one wrench on the fitting.
Attaching Fittings to Rigid Plastic Pipes to Form Solvent Welded Joints.
- Swab the solvent weld cement around the outside of the pipe end.
- Swab the solvent weld cement to inside of the fitting.
- Push the fitting on the pipe using a quarter turn to spread the cement evenly.
- Hold the fitting firmly on the pipe for about a minute.
- Wipe excess cement from around fitting.
Attaching Fittings to Flexible Plastic Pipes to Form Clamped Joints.
- Slide the metal clamp on the pipe.
- Push the pipe on the fitting as far as it can go.
- Move the clamps in place.
- Tighten with a screwdriver.