Double check to ensure you have secured all permits In
addition, have the local utilities mark all the buried lines and
pipes before you start digging.
Use flags to indicate sprinkler locations according to your
design Also, mark the location of your drip system risers Even
if you plan to install the actual drip system at a later date, you
can install your drip risers with the rest of your system
Use line-marking spray paint to mark where you’ll trench for
pipes and wiring Check your worksheet to make sure you mark
the lines accurately You will be digging your trenches along
these lines
By cutting into your service line and slipping on a compression
tee, you can connect your sprinkler system to the water
supply without soldering In some instances, you can avoid
cutting the main line by attaching your system to the outside
faucet connection (see diagram and note) PVC pipe may be
substituted for copper in non-freezing areas.
SHUT-OFF VALVES
Whether a PVB is used or not, we recommend installing a
shut-off valve between the zone valves and the service line
This will allow you to easily turn off the water to your irrigation
system if you need to make repairs or replace parts Check local
codes for the type of shut-off valve recommended.
IF THE METER IS IN YOUR YARD:
Shut off your water supply at the meter
(check with your water department first).
Dig to expose the service line.
Tie into the service line, between
the water meter and the house.
Remove a section of pipe, leaving a gap
large enough to slide on a compression tee.
Slip the tee over each end of the pipe.
Tighten the compression nuts. The rubber gasket will
compress against the pipe, creating a seal to prevent leakage.
Install a short nipple, using PTFE tape
on all threaded connections to the tee.
Attach a shut-off valve, in a small enclosure,
to this section of pipe. The shut-off valve allows
you to turn off the system by hand, if necessary.
keep this connection as clean as possible.
This is your tap water supply.
IF THE METER IS IN YOUR BASEMENT:
Shut off your water supply at the meter
(check with your water utility).
Install an appropriate tee into the service
line for the irrigation connection.
Drill a hole through the sill above the foundation, or chisel
a hole in the basement wall for the irrigation line to run
through. Make it no bigger than needed for a 1” pipe.
Install the connection fittings, as shown. A ball valve is a
good choice for the irrigation shut-off. For the drain valve,
use a gate-type valve. The drain valve should be as low as
possible to allow complete system drainage.
Feed your irrigation system pipe out through the basement
wall, and run it to the backflow preventer location (see page
12 for more information on backflow prevention).
Finally, seal the hole in the sill or foundation
with caulking compound.
The main irrigation line is the pipe that runs from your service
line to your valve manifolds The lateral lines are the lines that
run from the valve manifolds to the sprinkler heads
TRENCHING BY HAND
To soften the soil, water the ground approximately two days
before you dig Dig trenches 8” to 12” inches deep Put sod on
one side of the trench and soil on the other.
WARNING! Before digging any trenches, you must have
all underground utilities marked to avoid any damage. Call your local
underground locator service or the city for information.
TRENCHING USING A TRENCHER
Trenching machines are an easier, faster alternative to digging
with a shovel They can be rented by the hour, day or week,
usually from a lawn supply store or rental equipment dealer
The person you rent from can show you how to operate the
machine properly and safely Trenchers should not be used
to dig through ground cover, flower beds, on steep slopes or
near buildings Be sure to verify all underground utilities before
trenching
In colder
climates a
vibratory plow
is used for
pulling pipe.