How to build a do-it yourself underground irrigation system

The benefits of an underground irrigation system are indisputable.
A streamlined and consistent underground irrigation will make our garden more beautiful and vital and will help us in those moments when we are away from home.
How can we build an  underground irrigation system in our garden, without having recourse to any technician.

Step 1: design
Bring paper, pen and meter, measure your garden and draw it in plan.
Divide the garden into zones.
Consider that each zone can support up to 5 pop up (sprinklers ), there are calculations that take into account the pressure drop due to friction in the pipes that carry water, so the larger the diameter of the tube , the lower the pressure drop as a result the flow rate is increased as the pressure.
Using a compass locate on the map the projections of the pop-up irrigation drawing also the center that will be precisely the location of the sprinkler.

Step 2: Install solenoid valves
The battery of valves is the set of hydraulic solenoid valves opening and closing circuits.
General rule: the diameter of the tube used to connect the battery to the service line valves, should not be smaller than the diameter of the valves.
Install upstream of the solenoid circuit, a gate valve in order to isolate the entire system, for example for maintenance work.

3rd stage: track the underground irrigation system on the ground
After designing the plant it is time to trace the path of the pipes on the ground of the individual circuits of sprinklers.
Plant pickets at each point where there is a sprinkler.
With a draw string on the ground the path of the irrigation pipes using a lime powder .

Step 4: dig the ditches
With a spade dig a ditch along the track with a minimum depth of 20/25 cm.
For the manifold choose a polyethylene tube, easy to assemble with fittings also made of polyethylene, a simple jig for iron.

5th step: install underground sprinkler irrigation
Once the tube is positioned along the path, place pop-up sprinklers according to our project.

6th stage: testing circuit irrigation
Before burying pipes and sprinklers ensure that the sprinkler head is at the same level with the floor of the turf. We also recommend to carry out a test that will allow us to test for leaks in the connections and get a perfect coverage of irrigation.

7th stage: close trenches
Now we can backfill the excavation to the surface by placing the lawn or reseeding. It  should now better to clear debris from the circuit during the processing of the soil infiltrates, just removing the pipe end protections and running water in the pipes.


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