Irrigation Pipe Installation

Prep

• 1

  Place flags into the ground to mark where the sprinkler housings will go.

• 2

  Spray paint the ground where you plan to trench.

• 3

  Dig the trenches at least 8 inches deep with a trenching machine or by hand.

• 4

  Lay out all parts including fittings beside the trenches where you plan to install them.

Irrigation Line Insertion

• 5

  Turn the handle of the main line water valve, until it's in the off position. Several inches after the main line valve, cut a section the exact length of the slip-type compression T you plan to install with a PVC pipe cutter. Roll the ends off of the T and slide them onto the open ends of the main line. Always wrap Teflon tape around PVC pipe threads; do this with the threads on the T. Insert the T into the open section of the main line and screw the ends onto the Teflon-wrapped threads of the T. Always tighten fittings with a wrench no more than one and half turns.

• 6

  Screw two fittings into both sides of a PVC shut-off valve and cut a 4-inch section of PVC pipe. Brush primer onto the inside of the shut-off valve fittings, the inside of the compression T opening, and the outside ends of the 4-inch section. After that, wipe the section ends, the T interior and one fitting interior with glue. Insert the section into the T, turn it a quarter turn, insert the shut-off valve onto the end of the section and give it a quarter turn. Hold both in place for 15 seconds.

• 7

  Wipe primer and glue into the open shut-off valve fitting and onto the end of the PVC pipe that will run from the shut-off valve to the valve manifold.

Valve Manifold Insertion

• 8

  Cut a 4-inch section of PVC pipe and screw two fittings into the "Flow" inlets of the water valves.

• 9

  Wipe primer and glue on both ends of the PVC section, on the end of the pipe from the shut-off valve and on the interior of the water valve fittings. Connect these pieces together to form the valve manifold. Twist the fittings and the pipe section, until the connection is secure and hold the unit in place for 15 seconds.

• 10

  Twist two PVC fittings into the outlets of the water valves.

Yard Installation

• 11

  Wipe primer and glue onto the two ends of the zone pipes that will connect to the water valves. Wipe primer and glue on the inside of the water valve fittings and insert the two pipes. Twist them a quarter turn and hold them in place for 15 seconds.

• 12

  Wipe primer and glue onto the remaining fittings and pipes of the irrigation system in order, and fit them together one at a time.

• 13

  Insert fittings into the zone lines where each sprinkler housing will be installed. Twist a swing-pipe assembly into each fitting and tighten them by hand. Screw the sprinkler housings onto the ends of the assemblies and tighten them by hand.

• 14

  Cover the trenches with dirt with the sprinkler housings installed vertically in the ground with the spray head just above and level to the ground.

• 15

  Lower a valve manifold box over the valve manifold and cover the trench around the box with dirt.