How to Add an Automatic Timer to an Existing Sprinkler System
A home irrigation system can take most of the work out of watering the lawn and garden. When the system is installed with an automatic controller and valves, the system becomes the "set it and forget it" way of watering the landscape. However, many systems are installed with manual valves that require the homeowner to turn the valves on and off for the system to run and shut off. This type of system can easily be converted to an automatic type system. Does this Spark an idea?
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Things You'll Need
- Saw
- Threaded fittings - same as pipe used
- Automatic valves - one to replace each manual valve
- Automatic controller (capable of controlling the number of valves needed)
- Irrigation wire
- Wire nuts
- Electrical tape
- Wire cutters
- Wire strippers
Instructions
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1
Locate each manual valve for the system. these are the valves that are turned on and off to run the system. Most manual systems will have one or two.
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2
Turn off all the valves.
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3
Cut the pipe just past the valve, on the sprinkler side of the valve.
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4
Hold the automatic valve up to the pipe and mark the ends of valve on the pipe. Hold on end of the valve up to the cut in the pipe and mark the other end. Cut the pipe on this second mark.
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5
Install the threaded fittings on the valve. The fittings should not be more than hand tight. Over tightening the fittings can damage the valve and threads.
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6
Install the valve and fittings into the pipe where it is cut. Every pipe has a different procedure for this. Make sure to use the correct fittings for the type of pipe in the system.
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7
Determine the location for the controller. This can be in the house or under and awning. Most automatic timers are weatherproof.
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8
Attach the extra irrigation wire to the control valve. For this strip, the ends of all the wires to expose 1/2 inch of copper, then twist the wires together in pairs and cap with a wire nut. Then wrap the connections in electrical tape for weather resistance.
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9
Run the irrigation wires to the location of the controller and attach the wires to the correct terminals for the controller. Every controller wires differently, make sure to check the owners manual for the correct wiring procedures.
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10
Turn the valves on and test the system. Turn the system on with the controller. If the system does not work, check all of the wire connections or consult a local irrigation professional.
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Tips & Warnings
Many "after install" controllers are battery powered and weather resistant and can be mounted directly to the main supply line for the system.
Make sure to check with local building inspectors for permitting and inspection requirements for changes to an existing system.
