Some of the pool/spa components we inspect: 

Deck, Coping, Waterline Tile

Strainer/Skimmer, Auto-fill, Aerator, pool waterfall, pool water feature(s)

Pool/Spa Shell, Drain(s), Returns, Steps, Ladders, Bench Seats

Cleaning system if connected and operating

Electrical items such as light(s), timers, pumps, panel, wiring

Visible piping, pumps, filter, valves

Heater, chlorine generator, air pumps