Why Does My Sprinkler System Have Low Water Pressure?

Automatic sprinkler system watering

Your sprinkler system is essential for maintaining the health and appearance of your lawn. However, a common issue that you might encounter is low water pressure. This issue may prevent parts of your lawn from being irrigated.

Low water pressure in an irrigation system is a typical problem mainly caused by faulty backflow preventer valves or dirt clogging the lines. Let’s take a look at the causes of low water pressure for a better understanding.

Reasons for Having Low Water Pressure in Your Sprinkler System

Your sprinkler system must function properly to maintain a healthy yard. While a sprinkler system can fail for various reasons, one of the most common issues is insufficient water pressure. The sprinkler system will not work correctly if the water pressure is too low. Here are some reasons why:

1. Backflow Preventer Valve Problem

Backflow preventer valves that do not fully open are the most prevalent cause of low water pressure in a sprinkler system. Your backflow preventer has two main pipes (vertical and horizontal) that must be fully open to ensure proper water pressure. To fully open them, the handles must be parallel to the pipe. Even if the handles are only partially turned or just one is turned, the water flow will be restricted, resulting in low-pressure.

It is best to have a professional contractor address your backflow to guarantee it is done properly.

2. Leaky or Broken Pipes

A break or leak in your water line is a far more significant issue. It can be caused by accidentally breaking a water line while digging too close. It frequently happens when you inadvertently damage one of these pipes while installing garden stakes or fence posts. If this is the situation in your home, you should contact a sprinkler repair contractor right away.

3. Clogged Lines

Sometimes, only one of the sprinkler heads has poor water pressure. If this is the case, something must be trapped in the head and clogging the drain. Water cannot flow correctly through the system if something blocks the sprinkler heads. A telltale sign is when you discover that some sprinkler heads are working properly while others are not. If this is the problem, the sprinkler heads will need to be correctly cleaned and evaluated for other faults.

4. Valves Not Fully Open

The shut-off and main water valves are two other valves to be aware of. In most sprinkler systems, a shut-off valve links to your home’s water supply. Make sure this valve is fully open to ensure enough water pressure. You should also remember to check your main water valve, which is the one that supplies water to your entire house. Make sure this valve is entirely open to guarantee optimum water pressure. Contact a professional for assistance in locating these valves and ensuring they are fully open.

5. Water Issues

If the low water pressure in your sprinkler system is not caused by any of the above, the issue could be due to your neighborhood’s water supply. In the summer, when it becomes scorching and dry, homes may need extra water to maintain their lawns properly. Some areas are at risk of running out of water if applicable water usage regulations are not implemented. It may result in low water pressure in your sprinkler system.

Best Sprinkler Maintenance and Repair with Austex Sprinklers

If you are experiencing low water pressure in your sprinklers or have other concerns about your sprinkler system, Austex Sprinklers has you covered. We have more than ten years of experience repairing sprinklers in the Greater Austin Metro area. Contact us today at (512) 721-8564 to book an appointment!

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