|
A new sprinkler system will need to be connected to your home’s cold water supply. If existing pipes will need to be cut, you may want to hire a plumber; otherwise, don’t forget to turn off the water before you get to work.
If you live in a mild climate, you only need an outdoor faucet to connect to. If that doesn’t provide enough flow, or if you live in a colder region where outdoor pipes may freeze, you will need to connect the system to your home’s main supply line.
Connecting at an existing faucet
You won’t have to cut pipe if you connect your sprinklers to an outdoor faucet. Start by turning off the water supply and draining the faucet; then remove the tap. Install a galvanized or brass tee, making sure to use the right size for the faucet and the irrigation pipes. Put the faucet back on again, and then use a nipple (a length of pipe that has threads on both ends) to connect the shutoff valve to the tee. 
Connecting at the main supply line
Make sure to turn off the water before the location where you plan to cut into the pipe. To make a connection aboveground, cut out a short piece of pipe in the supply line, install a slip tee, and attach a nipple to the stem for the shutoff valve.
Preventing Backflow
It’s important to prevent debris from washing back into your water supply when you attach a sprinkler system to the main line. Backflow preventers come installed into anti-siphon control valves. Use a vacuum breaker at the start of the system if you’re using in-line valves, or put one on the end of the faucet if you’re installing a single-circuit system that connects to the hose bibb. In any other situation, a reduced-pressure principle backflow preventer installed before the valves on the main line (at least 12 inches above ground) is necessary.
Illustrations Copyright Sunset Publishing Corporation
|
