How to install fixed pipe irrigation

Graeme
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How to install fixed pipe irrigation

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Project Overview

A fixed pipe irrigation system is a great way to keep larger lawns watered. We’ll show you how to install a pop-up sprinkler system with PVC piping in just a few steps. 
Continue to step-by-step instructions
This D.I.Y. Advice is part of a series How To Install Pop Up Sprinklers
sprinklers
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Make connecting irrigation pipes easier

When connecting poly pipe for irrigation projects, like installing pop-up sprinklers or water features, soak your pipe ends in hot water. This will soften them and let you mould the ends to suit the fittings that join the pipes together.

Step by Step Instructions

1 Dig a trench around the perimeter
2 Cut PVC pipes to length
3 Insert T pieces at sprinkler positions
4 Install the solenoid valve at the water source
5 Prime and glue the joins
6 Attach the sprinklers
7 Backfill the trench
8 Check the system is working properly
  • Step 1. Dig a trench around the perimeter

    Work out where you want your sprinklers to go, making sure the arc for each one overlaps the area of lawn they’re covering.  Dig a trench around the perimeter of the lawn and calculate how many sprinklers you will need.

  • Step 2. Cut PVC pipes to length

    Cut the PVC pipes to the correct length. Lay out the entire system so you can make sure you have the correct layout. When you are happy, come back and reattach everything using the primer and glue.
  • Step 3. Insert T pieces at sprinkler positions

    In the middle section we have a half circle spray. Insert a T piece joining the pipes together. Put a riser in there and attach a pop up sprinkler in the middle. In the corner we are using a plain elbow and a small piece of pipe to attach a threaded T junction. There is also an elbow with a thread in the top that you could use.
  • Step 4. Install the solenoid valve at the water source

    At the water source, put a T piece in and run a pipe off to attach to the solenoid valve. This valve controls the flow of water to the watering system.  Continue to cut pipe and fit the fittings around the trench.
  • Step 5. Prime and glue the joins

    When you are happy with the positions of the sprinklers, you can prime each joint to clean it and use a rider to make sure they are sitting vertically. Apply the glue to both surfaces on the pipe and put your joints together. The glue sets quickly so make sure they are sitting vertically.
  • Step 6. Attach the sprinklers

    When everything is in place, flush the system to get rid of any dirt. Attach the small risers to each pop up sprinkler unit and screw them into the joins. 

  • Step 7. Backfill the trench

    Now, using your spade, backfill the trench with soil to cover up the whole watering system. 

  • Step 8. Check the system is working properly

    Finally, turn on your sprinkler system to make sure that it’s working correctly.

Tools and Materials

Tools

  • Hacksaw
  • Measuring tape
  • Shovel

Materials

  • Glue
  • Pop up sprinklers
  • Primer
  • Rag
  • PVC pipe
  • White PVC fittings, risers and t-joins
  • Solenoid valve
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