The rule that sets your runtime: one turnover a day
Forget guessing. Your pump needs to circulate your entire pool volume at least once every 24 hours — that's "one turnover." Moving water is what lets the filter catch debris, distributes chlorine evenly, and keeps algae from getting a foothold. How many hours that takes depends on your pump's flow rate and your pool's size, but for a typical West Hills backyard pool it lands in the 8-to-12-hour range during the warm months. Stagnant water is where problems start, and in our climate they start fast.
Why West Hills heat means longer runtime
The west San Fernando Valley gets genuinely hot — summer afternoons routinely push 100°F-plus around Platt and Vanowen, and that heat changes the math. Warm water burns through chlorine faster and is friendlier to algae, so the water needs to move more, not less. Add the fine dust that rolls off the Santa Susana foothills on a dry, windy day and your filter has more to catch. Under-run the pump in July to save a few dollars and you're inviting a cloudy or green pool that costs far more to fix than the electricity you skipped.
| Season | Suggested daily runtime |
|---|---|
| Peak summer (Jun–Sep, 95–105°F) | 10 – 12 hours |
| Spring / fall (shoulder season) | 8 – 10 hours |
| Winter (cool, low use) | 4 – 6 hours |
| After a dusty Santa Susana wind event | +2–3 hours to clear it |
Rule of thumb: in a West Hills summer, run your pump roughly 1 hour for every 10°F of typical afternoon high, then split it into two cycles so the water never sits still for long. When in doubt, run it longer — algae is far more expensive than electricity.
The money-saver: variable-speed + off-peak hours
Runtime drives your power bill, but you have two strong levers on LADWP rates. First, a variable-speed pump. A single-speed pump runs flat-out the whole time, but a variable-speed unit moves the same water on a longer, slower schedule using a fraction of the energy — the savings often pay back the pump within a couple of seasons. Second, timing. Run the bulk of your hours during off-peak periods (typically overnight and early morning) rather than the hot late-afternoon peak window. Same turnover, lower cost. A simple timer or the pump's built-in scheduler handles it automatically.
Common runtime mistakes we see in West Hills
- Running too few hours to save money. The summer heat punishes this — you trade a small power saving for a chemistry problem.
- One long midday block. Splitting into two shorter cycles keeps water moving across the day and improves clarity.
- Same runtime year-round. Winter pools need far fewer hours; not dialing it back wastes energy.
- Old single-speed pump on peak rates. The most expensive way to circulate water there is.
Dial in your pump schedule
The right runtime depends on your exact pump, pool size, and how the sun and dust hit your yard. A quick look gets you a custom schedule that keeps the water clear and trims the LADWP bill — with a firm quote if a variable-speed upgrade makes sense for you.
West Hills Pool Service FAQs
How many hours should I run my pool pump in West Hills?
Aim for one full turnover of your pool's water each day. In our hot summers that's usually 8–12 hours, dropping to 4–6 in winter. The exact number depends on your pump's flow rate and pool size, so a pump that moves more water needs fewer hours.
Should I run my pool pump at night in West Hills?
Running the bulk of your hours overnight or early morning is smart here — it falls in LADWP's off-peak window, so you get the same turnover at a lower cost while avoiding the hot late-afternoon peak rates. A timer makes it automatic.
Will a variable-speed pump really save money?
In most West Hills pools, yes. It moves the same water on a slower, longer schedule using far less energy than a single-speed pump running flat-out. The energy savings frequently pay back the pump within a couple of seasons, and it runs much quieter.
Can I run my pump less to save on my electric bill?
You can trim winter hours, but cutting summer runtime to save money usually backfires. Our heat burns chlorine fast and feeds algae, so under-circulating invites a cloudy or green pool that costs far more to fix than the power you saved. Cut cost with timing and a variable-speed pump instead.
Do I need to run the pump longer after a windy, dusty day?
Yes — when Santa Susana winds carry fine dust onto the water, give the pump an extra couple of hours to filter it out before it clouds the pool or settles on the floor. Skimming first and then letting the filter run helps it clear faster.
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