Includes: Recirculation system installation; Pump/control troubleshooting; Compatibility review with tank or tankless systems; Timer/control setup guidance; Repair of selected circulation components; Hot-water delivery evaluation. Common issues: Long wait for hot water; Hot water arrives slowly at far fixtures; Pump not running; Noise from circulation pump; Water heater interaction issues; Recent water-heater replacement changed performance. Process: 1) Review hot-water wait times and plumbing layout. 2) Inspect water heater and existing recirculation components if present. 3) Explain system options and limitations. 4) Install or repair approved components. 5) Test hot-water delivery and controls.