What Is Turnover Rate — and Why Does It Matter?
Before you can answer "how long should my pump run," you need to understand what your pump is actually trying to accomplish. The goal is not to hit a specific number of hours — the goal is to achieve adequate water turnover.
Turnover rate is how long it takes for the entire volume of your pool to pass through the filter once. A pool that turns over completely every 6 hours has gone through four full filtration cycles in 24 hours. A pool that only turns over once every 12 hours has gone through two — which may be adequate in a mild climate but is often insufficient in Las Vegas summer.
The standard recommendation is two complete turnovers per 24 hours in normal conditions. In Las Vegas summer — 105°F temperatures, extreme UV, high bather load — two turnovers is the minimum, not the target.
Calculating Your Pool's Turnover Time
The math is straightforward. Your pump's flow rate (in gallons per minute) divided into your pool's volume gives you the turnover time in minutes.
What Happens When Your Pump Doesn't Run Long Enough
In a mild climate, running a pump too few hours is an inconvenience. In Las Vegas summer, it's a fast path to a green pool, a chemistry bill, and an avoidable service call. The combination of extreme heat, intense UV, and year-round operation means that what a pool can tolerate in other climates it simply cannot tolerate here.
The Real Cost of Under-Running Your Pump in Las Vegas
- A single algae event costs $150–$400 in treatment chemicals and service time — often more than a month of additional pump run time would have cost on a VSP
- Green pool cleanup adds 2–5 days of chemical treatment, often requiring filter cleaning and multiple follow-up visits
- Surface staining from inadequate circulation can require an acid wash — a $300–$600 service that's entirely preventable
- Chemistry imbalance from poor distribution shortens plaster life, accelerates scale, and stresses equipment — all costs that compound over years
Las Vegas Pump Run Time — VSP vs Single Speed
The right run time depends on your pump type. Variable speed and single-speed pumps are not equivalent — a VSP running 20 hours at low speed uses less electricity than a single-speed running 8 hours at full speed, while providing far superior circulation and filtration.
Las Vegas Pump Run Time by Season
Las Vegas has four distinct pool seasons, each with different run time requirements. Unlike cold-climate pools that shut down completely in winter, Las Vegas pools keep running year-round — but at different intensity levels.
| Season | Conditions | VSP Recommendation | Single Speed Minimum |
|---|---|---|---|
| Peak Summer (Jun–Sep) | 100–115°F · extreme UV · high algae risk | 18–24 hrs/day | 10–12 hrs/day |
| Late Spring / Early Fall (Apr–May, Oct) | 85–100°F · moderate UV · active swim season | 16–20 hrs/day | 8–10 hrs/day |
| Mild Spring / Fall (Mar, Nov) | 65–85°F · lower UV · transition season | 12–16 hrs/day | 7–8 hrs/day |
| Winter (Dec–Feb) | 40–65°F · low UV · minimal demand | 8–12 hrs/day | 6–8 hrs/day |
Why a Variable Speed Pump Changes Everything
The fundamental problem with a single-speed pump is that it forces a trade-off: run it long enough to achieve adequate circulation, or keep the energy bill manageable. In Las Vegas summer, you often can't do both at once with a single-speed pump.
A variable speed pump eliminates that trade-off. Running at 1,750–1,950 RPM — low enough to be nearly inaudible — a VSP consumes a fraction of the electricity of a single-speed pump running at full speed. The total daily energy cost of a VSP running 20 hours at low speed is typically less than a single-speed pump running 8 hours at full power. You get more circulation for less money.
Beyond energy, more hours at low speed produces better water quality — not worse. Slower flow through the filter media captures finer particles than high-speed flow. More total hours means more total filtration. The pool is clearer, the chemistry is more stable, and the equipment runs cooler with less wear. For a full explanation of how VSPs work and what they save in Las Vegas specifically, see our variable speed pump savings guide →
If your single-speed pump is aging, facing a repair, or simply making your summer electricity bill painful — this is the conversation to have. We service and program Pentair IntelliFlo, Hayward EcoStar, Jandy FloPro, and Sta-Rite IntelliPro platforms, and we program every pump we install with a schedule specific to your pool's volume, equipment, and Las Vegas seasonal conditions. See our pump service and VSP installation page →
Still Running a Single-Speed Pump?
Let's talk about what a variable speed upgrade would actually save you — specific to your pool.