Common causes of low pressure

Low pressure in an underground sprinkler line usually points to a restriction or loss somewhere in the system. Common causes include:

  • Cracked or split pipe underground
  • Partially clogged nozzles or filter screens
  • Faulty valve that is not opening fully
  • Root intrusion or soil movement around the pipe
  • Mainline leak that reduces flow before water reaches the heads

In some cases, the issue is only one zone. If one area sprays weakly while others work normally, that can help narrow down the source.

Why it matters

Low pressure can leave dry spots, cause uneven coverage, and waste water if the system keeps running longer to compensate. A professional inspection can confirm whether the problem is in the line, the valve, or the sprinkler heads themselves.

If you need help with Underground Sprinkler Repair in Dallas, Dallas Landscape & Irrigation can diagnose the issue and recommend the right fix. Request an estimate to get started.