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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.

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.


  1. Shut off your water supply at the meter
    (check with your water department first).
  2. Dig to expose the service line.
  3. Tie into the service line, between
    the water meter and the house.
  4. Remove a section of pipe, leaving a gap
    large enough to slide on a compression tee.
  5. Slip the tee over each end of the pipe.
  6. Tighten the compression nuts. The rubber gasket will compress against the pipe, creating a seal to prevent leakage.
  7. Install a short nipple, using PTFE tape on all threaded connections to the tee.
  8. 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.
  9. keep this connection as clean as possible.
    This is your tap water supply.


  1. Shut off your water supply at the meter
    (check with your water utility).
  2. Install an appropriate tee into the service line for the irrigation connection.
  3. 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.
  4. 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.
  5. 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).
  6. 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

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.

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 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.