My Zone #1 will not operate. I hear Water Hammer in pipes when Zone is suppose to be operating... The sprinklers have a small amount of water coming out...in rythm with the water hammer. The Sprinkler control shows the Zone watering... but not enough pressure to make the sprinklers work. I can manually operate the sprinklers by turning the solenoid.. good pressure. Does anyone know what my problem could be???
The house is 19 years old...original sprinkler system.... Sprinkler control replaced last year. Thank you in advance....