Pool Equipment Annual Service Checklist: What Pros Do Every Year

Weekly chemical service keeps the water safe. Annual equipment service keeps the machinery alive. These are two entirely different jobs, and conflating them is how expensive equipment fails mid-season. An annual service is a methodical, every-component inspection and tune-up that takes 2–3 hours but prevents the majority of in-season breakdowns. Here is the complete checklist professionals follow.

Pump

• Inspect lid o-ring — replace if flat, cracked, or brittle; lubricate with silicone grease
• Inspect shaft seal — look for moisture at the seal plate junction; replace if any sign of weeping
• Check union o-rings on both suction and return unions — lubricate or replace
• Inspect impeller for debris, chips, or calcium buildup — clean with mild acid solution if needed
• Listen to motor bearings at startup — grinding, rattling, or squealing means bearing failure is imminent
• Check motor vent slots for debris, nesting insects, or blockage
• Verify motor amp draw with a clamp meter — compare to nameplate rating; over-amping indicates impeller restriction or bearing wear
• Record run time hours if the pump has an hour meter

Filter

• Sand filters: Check media age — note date of last replacement; inspect laterals through top opening; verify backwash pressure differential is correct
• DE filters: Pull grid assembly annually; inspect every grid for tears; acid-wash grids; inspect and lubricate body o-ring; check manifold for cracks
• Cartridge filters: Pull and inspect all cartridges; acid-wash or replace; check all internal o-rings; inspect tank for cracks at the band clamp
• Record current operating pressure and note on filter — establishes baseline for the season
• Inspect multiport valve (sand/DE) — lubricate spider gasket; check handle and cam for wear
• Check air relief valve — it should vent air and seal; replace if it weeps water continuously

Heater

• Inspect burner tray for rust, debris, and spider webs — clean with compressed air
• Check igniter condition — replace if corroded or cracked
• Inspect heat exchanger for scale buildup or green corrosion (copper)
• Verify pressure switch operation — replace if intermittently failing
• Check bypass valve function on heaters with bypass plumbing
• Confirm thermostat setpoint and verify heater cycles on and off correctly through a full cycle
• Clean combustion air intake screen

Salt Chlorinator (if present)

• Visually inspect cell plates for calcium scale buildup — acid-wash if needed
• Check cell cable connector for corrosion or loose connection
• Note current salt level reading vs. actual salt test
• Record cell age — typical service life is 3–7 years depending on model and water quality
• Check flow switch and inspect flow sensor housing for debris

Automation and Controls

• Check controller firmware version — update if manufacturer has released a security or performance update
• Verify all timer schedules are correct after any power outages
• Test every relay — turn each circuit on and off through the controller and confirm the equipment responds
• Inspect wiring terminals in the panel for corrosion, loose connections, or insulation damage
• Test remote access (app or web) if the system supports it
• Check and calibrate chemical sensors (ORP/pH probes) if present

Plumbing and Valves

• Operate every valve through its full range — actuated and manual; lubricate stiff valves
• Inspect all unions for o-ring condition — replace any showing compression deformation
• Check all visible plumbing for scale, staining, or micro-cracks at glue joints
• Inspect check valves — verify they hold water back and do not stick open
• Test pressure gauge accuracy — replace if frozen or reading incorrectly

End-of-Service Report

After completing the checklist, present the client with a written summary of findings: items that are in good shape, items that are marginal and should be watched, and items that need immediate attention. This is how a $250 annual service call becomes the starting point for $800 in justified equipment repairs — not because you are upselling, but because a thorough inspection actually finds real problems before they become emergencies.