A sprinkler system needs good water pressure for even water distribution across your lawn. Some sprinkler heads may not rotate or have dry spots when the pressure is low. Here are some common reasons why there is low water pressure in the sprinkler system.

Reasons Why Your Sprinkler System Has Low Water Pressure

Inspect the Water Supply

Go slow and start small. Keep the main water shut-off valve fully open.

If the valve is partially closed, it can cut back the water supply to the sprinkler system. This can impact the entire irrigation system.

If the pressure has suddenly decreased after plumbing or irrigation repairs, see if a valve was left partially closed.

Check for Clogged Sprinkler Heads

Sprinkler heads and nozzles can accumulate dirt, sand, grass clippings, and mineral deposits.

In this case, water may not spray as expected, but rather flow in a weak stream.

Some sprinkler heads may not be spraying as far as others in the same zone. Remove and examine affected heads. Cleaning or replacing clogged nozzles may restore performance.

Check Sprinkler Valves

Sprinkler valves spray water to individual zones. A valve that does not open completely could spray less water to reach the affected area.

Damage to the diaphragm, electrical issues, debris, or worn valve parts may all disrupt the proper functioning of the valve.

If low pressure is in one sprinkler zone and normal pressure in the other zones, the zone valve is likely to be the first to check.

Test for Underground Leaks

An undetected leak in the irrigation system can cause a substantial drop in water pressure.

If the underground pipe is broken, water can leak out before it gets to the sprinkler heads. Sometimes, you will see wet spots, muddy patches, sunken soil, or puddled spots in the yard.

But not all underground leaks are apparent. A leaking pipe can be under grass, landscaping, or soil and not form a puddle.

In case of weak sprinkler system pressure, a professional will be able to check the system for underground pipe damage.

Check the Sprinkler Nozzles

There are various types of sprinkler nozzles that are used to provide certain amounts and types of water. System performance can be impacted by installing the wrong nozzle.

If the nozzle is too small, it can decrease coverage. A damaged nozzle can also cause an uneven or distorted spray.

Inspect sprinkler heads to see if nozzles are damaged, missing, or improperly installed. Correct component replacement can aid in restoring the desired spray pattern.

Consider Too Many Sprinklers in One Zone

There is a water capacity for your irrigation system. If more than the required number of sprinkler heads are in use in a zone, there will be insufficient water for each head to function properly.

This can cause low pressure in the sprinkler system, particularly if multiple sprinkler heads are operating simultaneously.

It may be observed that the sprinklers are more effective when only a portion of the system is operating.

In this case, the answer could be to redesign the zone, to decrease the number of heads working at the same time, or to change the type of sprinklers or nozzles.

Also Read: Sprinkler System Maintenance Checklist for Every Season

Examine the Pressure Regulator

In some properties, there is a pressure regulator to regulate the water pressure entering the property.

If the regulator becomes faulty or is set incorrectly, it can affect the amount of water available to your irrigation system.

A professional can check the pressure both before and after the regulator to see if it is a problem.

This will be helpful if the whole sprinkler system suddenly starts to fail.

Review the Backflow Preventer

Backflow prevention devices are used to prevent contamination of the water supply in the home. But if the backflow device is faulty or partially blocked, it can impact irrigation.

If the water pressure is low in all zones, the backflow preventer should be checked with the main valve and water supply.

Key Takeaways

• There are a number of causes for low sprinkler pressure.
• Always check the main water valve first before you try to troubleshoot any other more complicated problems.
• If the heads and nozzles become clogged, they can shorten the spray distance.
• A valve issue can impact only one irrigation zone.
• Leaks can result in substantial pressure loss if they are underground.
• Too many sprinkler heads in one zone can decrease the effectiveness.
• Pressure issues across the system might need a professional inspection.

Summary

A low sprinkler pressure must not be overlooked. The problem with water distribution may cause some sections of your lawn to be dry and others to be watered too much.

Inspect water supply, sprinkler heads, valves, and nozzles first. If the issue persists, a professional inspection can be performed to find leaks, pressure restrictions, or other irrigation problems.

Restore Your Sprinkler System Performance

Dealing with low water pressure in your sprinkler system? Double Eagle Sprinkler can assist you with your sprinkler pressure issues and the amount of pressure your irrigation system requires to function.

Give Double Eagle Sprinkler a call today to schedule an irrigation system inspection and have your system back to providing the lawn coverage it deserves!