This customer had a leaking anti-siphon valve, which is used for filling the pool. Just a simple removal and replacement.

Outdoor plumbing pipes and fittings against a stucco wall, with garden hose attached. Terracotta and metal garden ornaments visible on the ground.
Outdoor faucet and hose connection on a stucco wall
Outdoor plumbing fixture with a bronze valve, black handle, and PVC pipes attached to a stucco wall.
Water pressure regulator and hose bibb pipe installation on a stucco wall.
Outdoor water faucet with a shut-off valve mounted on a wall.
Outdoor water pipe with shut-off valve attached to a wall