Understanding the Components of Your Lawn’s Irrigation/Sprinkler System

How does your irrigation/sprinkler system work? Learning about the various components in the system can help you spot early problems, upgrade your system, or find new ways to conserve water. Here’s an overview of the most common components in an outdoor sprinkler system.

Component	Purpose / Description
Water Source	Supplies water to the irrigation system (usually municipal water or a private well).
Valve Box	Buried green box that houses the irrigation control valves.
Control Valves	Regulate water flow to different zones of the yard; operate on timer signals.
Timers	Tell each control valve when to open or close; automate watering schedules.
Master Valve	Safety valve that stops water flow when the system detects a malfunction.
Shut-Off Valve	Above-ground valve used to quickly stop water to the irrigation system (separate from home’s main shut-off).
Water Pump	Pushes water from the source through the system; maintains proper water pressure.
Backflow Preventer	Prevents contaminated sprinkler water from flowing backward into the home’s water supply.
Water Meter	Measures water usage per zone; helps evaluate efficiency and monitor overall home water usage.
Pipes & Risers	Network of piping that carries water to sprinkler heads; risers elevate water flow to the heads.
Sprinkler Heads	Deliver water to the lawn; various types available depending on lawn/garden needs.
Surface Irrigation	Common method where water saturates the soil via gravity. Includes flood irrigation and furrow irrigation.
Flood Irrigation	Evenly spreads water over a field; inexpensive but can cause runoff.
Furrow Irrigation	Channels water through rows; more even distribution but requires regular maintenance.
Sprinkler Irrigation	Simulates rainfall using rotating heads; ideal for large yards and adjustable for even coverage.

The Water Source

Most people connect their irrigation system to a public water supply. If you don’t live in an area that offers municipal water, you might connect to a well. You’ll use whatever water source provides service to the rest of your home.

The Valve Box

You’ll rarely see this green box since it’s buried beneath the soil. It contains the valves that control your irrigation system.

The Control Valves

The control valves connect to the valve box, and each controls water flow to a different part of your yard. Timers control each control valve.

The Timers

Each timer tells its respective control valve to open or close. This is how the system controls the flow of water.

The Master Valve

When the system detects a malfunction, it will stop water flow by triggering this valve. This safety feature eliminates water waste in an emergency.

The Shut-Off Valve

You’ll find this valve above ground on your property to prevent freezing. It’s also separate from the main shut-off valve for your home’s water supply. When you have a problem with your sprinkler system, this valve gives you immediate control over the flow of water through the irrigation system.

The Water Pump

The pump moves water from the source through the system. It regulates the pressure of the water flow.

The Backflow Preventer

Backflow occurs when the water pressure is higher than the supply. The backflow preventer keeps sprinkler water from backing up to your home’s water supply. This important component ensures you’ll never have to worry about your sprinkler water and tap water mixing. 

The Water Meter

Your irrigation system will have a separate water meter. It measures water usage in every zone to help you evaluate where your sprinklers are using the most water. It might also connect to your home’s main water meter. You can use this data to measure how your sprinkler system is affecting your household’s overall water usage.

The Pipes and Risers

This is the network that carries water from the source to the sprinkler heads. The pipes deliver water through the system to the designated sprinklers. Risers push the water up to the heads.

The Sprinkler Heads

There are several types of sprinkler heads. You’ll choose your sprinkler heads based on your specific lawn care or gardening needs.

Surface Irrigation

This is the most common type of sprinkler system. It involves saturating the soil based on gravity. The water flows from the sprinkler head and falls onto the soil. There are two types of surface irrigation:

Flood Irrigation 

Water gets spread evenly across a field. It’s a cost-friendly method, but it can lead to excessive water runoff.

Furrow Irrigation 

This method is more effective and ideal for gardens. While it delivers more even water distribution, the property owner must keep up with furrow maintenance to achieve the best effects.

Sprinkler Irrigation

These systems work to simulate real rainfall. Rotary sprinklers rotate to spread water to a larger area. They work well when irrigating larger yards. Adjustable spray patterns make it possible for more even coverage.

Grass Works Installs & Repairs Sprinkler Systems in the Austin Area and surrounding areas. Grass Works is licensed by the State of Texas: #LI19556.