Sprinkler leaks basically take place as soggy spots, low pressure, or effervescent at heads

https://cashlsam759.cavandoragh.org/how-typically-should-you-arrange-sprinkler-maintenance

Sprinkler leaks most likely show up as soggy spots, low power, or effervescent at heads. Inspect risers, lateral lines, and valves, then restoration cracked fittings to repair device efficiency.