One Irrigation Zone Fails to Water – Diaphragm Replacement

Zone 1 Won’t Activate – Diaphragm Failure

Five inline valve zones; four work normally (whoosh sound, sprinklers start). Zone 1: no sprinkling, but water gushes from bleeder valve when opened. Cleaning diaphragm per online instructions didn’t help. A small black plastic piece with a hole sits loosely at the diaphragm base.

Resolution

The loose piece is a broken plastic screw. Replace the entire diaphragm. Ensure no old parts remain in the valve body and align all holes correctly during reassembly.

Reference: irrigationtutorials.com for diaphragm replacement guide.