System Installation; Making The Point Of Connection; Installing The Main Line - Hunter Sprinkler System Design Handbook

H. System Installation
Making the Point of Connection to City Water Supply
1. Refer to the Point Of Connection (P.O.C.) detail on
page 7.
2. Turn off the water supply to the residence.
3. Dig a hole to expose the supply line.
4. Cut a 25 mm piece out of the supply line, slip the
compression tee onto the pipe, and tighten the
compression nuts.
5. Install the brass nipple and gate valve.
6. Install the valve box for easy access to gate valve.
7. Turn the water back on to the residence.

Installing the Main Line

1. Using marking spray paint, indicate the pipe lines from the
pump or the P.O.C. to the valve manifold locations.
2. On existing lawns, lay down a plastic tarp alongside the
marked trench about 60 cm away from where the pipe will
be placed.
3. Remove the sod by cutting a strip about 30 cm wide and
4 cm to 5 cm deep using a flat shovel. Roll up the sod and
place the sod and dirt on the plastic tarp.
4. Trenching: Check local codes. If there are no established
local codes for sprinkler main line depth in your area,
trench 25 cm to 30 cm deep.
5. Installing Pipe Under a Walkway or Driveway:
Hammering Method: Cap off both ends of a galvanized
pipe and hammer through (See illustration).
Jetting Method: Using a pipe-to-hose threaded adapter,
connect one end of the pipe to a garden hose and attach
a small stream hose nozzle to the other end. Turn the
water on and jet under the concrete.
6. Install a backflow preventer where required by local
municipal codes.
7. Installing Pipe: Lay out pipe and fittings near the trenches
according to how they will be installed. Be careful not to
get dirt or debris in the pipe.
8. Beginning with the P.O.C. (or backflow preventer if
applicable), measure, cut and install the pipe, working
your way to the last manifold or stub-out. (See Sprinkler
System Overview on pages 8 – 9.)
9. Backfilling the main line is discussed on page 12.
10

System installation

Before trenching, use small flags and marking spray paint
to lay out the irrigation system.
First lay down tarps and remove sod, then dig trenches
25 cm to 30 cm deep for the main line. Trench 15 cm to
20 cm for lateral lines.
Connect pipe under a walk or driveway by capping
off the ends of galvanized pipe and "hammering"
through.