How often should you service a pool pump?
Updated July 2026
Empty the pool pump strainer basket every week the pool is open, and give the seals, lid O-ring, and motor a full check at seasonal open and close. That two-part rhythm is what keeps the pump primed and the shaft seal alive. Pool pumps last 8–12 years, but a single dry-run, when a clogged basket or an air leak starves the pump of water, can cook the mechanical seal in minutes and let water flood the motor.
What changes the interval
| Your situation | Interval | Why |
|---|---|---|
| Strainer basket | Weekly (twice weekly in fall) | Leaves and grit choke flow, and a starved pump runs dry and burns its seal |
| Lid O-ring and gaskets | Inspect at open and close | A dried, flattened O-ring sucks air and the pump loses prime |
| Mechanical shaft seal | At first drip; roughly every 3–5 years | A seal that weeps water onto the motor rusts the bearings |
| Motor bearings (listen) | Yearly, at spring open | A rising screech warns of a $250–500 motor before it seizes |
| Plumbing unions and pad | Seasonally | Loose suction-side unions are the top reason a pump will not hold prime |
| Variable-speed settings | Review at open | Long low-rpm runs move the same water for a fraction of the energy |
| Winterize the housing | Every fall in freeze climates | Water left in the volute splits the pump body at the first hard freeze |
The cost of skipping it
What skipping it costs: a clogged basket or a suction air leak makes the pump run dry, and the mechanical seal is the first casualty. A DIY seal kit is $15–30, but by the time you hear it, water has usually reached the motor: a replacement motor runs $250–500 and a whole new pump $500–1,200 installed, or $1,000–2,000 for a variable-speed model. Weekly basket duty and a couple of seasonal checks are the difference between a pump that reaches 12 years and one that dies at six. Pair it with a clean pool filter to keep flow strong.
How to do it (5 min weekly basket; 1 hour seasonal · DIY)
- Cut power at the breaker, not just the timer, before you open anything.
- Twist off the pump lid, lift out the strainer basket, and hose off leaves and debris; swap a cracked basket ($10–20).
- Wipe the lid O-ring clean and coat it with a thin film of silicone pool lube, never petroleum jelly, which swells the rubber.
- Look for a drip at the shaft where the motor meets the pump housing; a steady weep means the seal is on its way out.
- Reseat the basket and lid, restore power, and confirm the pump primes and the sight glass runs clear within a minute or two.
Knowing the interval is the easy half. OnOtto reminds you at the right interval, and it won't let you snooze it into next year. Tasks persist until they're done, and completing pool pump service schedules the next one automatically.
Put this on autopilot, free for 30 daysFrequently asked questions
How many hours a day should a pool pump run?
Enough to turn the whole pool over once a day, which is roughly 8–12 hours in summer for a single-speed pump. A variable-speed pump runs longer, often most of the day, but at a low rpm that uses far less power: many owners cut pump energy 50–80% that way. Split the run across daylight hours when the chlorine and filter are doing the most work, and cut back in the shoulder season when the water is cold.
Why does my pool pump keep losing prime?
Prime loss is almost always air getting into the suction side. Start with the cheap suspects: a strainer basket packed with debris, water below the skimmer mouth, and a dried lid O-ring that no longer seals. If those are clean, the leak is usually a loose union or a cracked valve on the pipe between the skimmer and the pump. A quick test is to smear pool lube around each suction fitting while the pump runs and watch for the air stream to stop.
Is a drip at the motor the seal or the motor?
A drip at the seam where the pump housing meets the motor is the mechanical shaft seal, a $15–30 kit and an hour of work if you catch it early. A grinding or screeching noise with no water, on the other hand, points to worn motor bearings, which usually means a $250–500 motor replacement. The lesson is speed: a seal caught while it only drips is cheap, but the same seal ignored floods and destroys the motor behind it.
Do I need to do anything different before winter?
In any climate that freezes, yes. Water trapped in the pump volute expands when it freezes and cracks the housing, which is a full pump replacement come spring. At close, drain the pump, remove the drain plugs, and store them in the basket so you can find them. See our full pool winterizing schedule for the rest of the system.