Why Does One Sprinkler Zone Have Low Pressure?

When every sprinkler zone is weak, the water supply deserves attention. When only one zone has low pressure, the problem is much more likely to be somewhere within that individual zone.

Look for an underground leak

A cracked pipe or broken fitting can divert enough water to keep multiple heads from rising. Wet turf, bubbling soil, or an unusually green patch can help narrow down the area.

Check the zone valve

A valve that does not open fully can restrict flow. Internal debris, diaphragm problems, or other valve issues can reduce performance even when the solenoid activates.

Inspect heads and nozzles

Broken heads can release excessive water, while clogged nozzles create isolated weak spray. Compare the performance of heads across the entire zone.

Consider changes to the zone

Added heads or mismatched sprinkler types can increase demand beyond what the zone can support. This is especially relevant on systems that have been modified repeatedly over many years.

For low-pressure sprinkler diagnosis in Bloomfield Hills and nearby Oakland County communities, call or text (248) 970-0700.