Pool Equipment Explained

The equipment pad holds the pump, filter, heater, sanitizer and controls that keep a pool running, and those choices affect operating cost and upkeep. This guide explains each component, the main choices, and what Southern Nevada conditions change.

How circulation works

Water leaves the pool through suction outlets (main drains and skimmers), passes through the pump’s strainer basket, is pushed through the filter, then through the heater and sanitizer, and returns through return inlets. Everything on the pad is sized around that loop.

Two numbers describe it:

• Flow rate, in gallons per minute, produced by the pump against the resistance of the pipes and equipment.
• Turnover, the time it takes to move the pool’s full volume through the filter once.

Permit plans ask for these. The City of Las Vegas checklist, for example, requires plumbing plans to show turnover in hours and pump GPM, filter type and size, heater type and size, and the location of main drains and skimmers, with suction entrapment avoidance under APSP 7 (City of Las Vegas checklist).

Suction safety

The federal Virginia Graeme Baker Pool and Spa Safety Act requires pool and spa drain covers to meet a federal anti-entrapment performance standard, and public pools with a single blockable drain need a secondary anti-entrapment device or system (CPSC). For a home pool, ask your builder how the suction design meets current code: listed covers, split drains and correct pipe sizing are common approaches.

Pumps

The pump moves water through the whole system.

The U.S. Department of Energy set efficiency standards for dedicated-purpose pool pumps, with compliance required for pumps manufactured or imported on and after July 19, 2021 (Federal Register, DOE). The rule is performance-based rather than a direct mandate for any one motor type. Ask your builder which pump model is proposed and how it meets the standard.

A variable-speed pump can be programmed to run at different speeds for filtration, cleaning, spa jets or water features. Ask how your builder will set those speeds and run times.

Questions to ask:

• What speeds will be programmed for filtration, spa and features?
• Is the pump sized for the actual plumbing, or oversized “to be safe”?
• Is there a separate booster pump for a pressure-side cleaner, or a separate feature pump?

Filters

Residential pools commonly use one of three filter types.

Swipe sideways to see the full table.

Southern Nevada’s amendments to the 2024 pool code require backwash and draining water to discharge to the sanitary sewer, to an approved on-site disposal system, or by other approved means, through an air gap (Southern Nevada ISPSC amendments). Cartridge filters have no backwash line. SNWA recommends washing cartridges when operating pressure rises about 10 psi above clean pressure (SNWA).

Heaters

HomeGuide’s national cost guide describes four heater types (HomeGuide):

• Gas (natural gas or propane): HomeGuide lists $1,500 to $4,500 installed nationally.
• Heat pump: moves heat from the air into the water; HomeGuide describes heat pumps as more energy-efficient. HomeGuide lists $2,000 to $6,000 installed.
• Solar: collectors, often roof-mounted. HomeGuide lists $2,500 to $6,500 installed.
• Electric resistance: HomeGuide lists $1,200 to $6,000 installed.

Ask your builder which heater type fits how you plan to use the pool and spa, and what each would cost to run. Some owners also ask about chillers, which HomeGuide lists at $2,000 to $5,000 nationally. Gas heaters need a gas line, and the City of Las Vegas checklist requires the gas line’s specification, size, length, demand and routing to be shown on the plans.

The National Plasterers Council advises not turning on a heater or chiller for 28 days after a new plaster finish (NPC).

Sanitizers and salt chlorination

Chlorine remains the standard residential sanitizer. The question is how it gets into the water.

• Salt chlorine generators pass lightly salted water through a cell that produces chlorine by electrolysis. The cell needs periodic inspection and cleaning. Follow the manufacturer’s guidance on cleaning intervals and methods.
• Tablet or liquid chlorine feeders add chlorine directly. CDC notes that products such as dichlor and trichlor contain cyanuric acid, a chlorine stabilizer.
• Supplemental systems such as UV or ozone are sometimes added. Ask your builder whether any supplemental system changes the chlorine levels you still need to maintain.

Salt pools still contain chlorine; the difference is how it is produced. Ask how your builder recommends managing water balance and dissolved solids over time.

Automation

Automation systems control pump speeds, heater, lights, valves and features from a panel or phone app. HomeGuide lists $1,500 to $3,500 nationally. Ask which functions the proposed system controls, whether chemistry monitoring (pH and ORP sensors) is included, and how often probes need calibration.

Water chemistry in Las Vegas

The Centers for Disease Control and Prevention recommends pH 7.0 to 7.8 and free chlorine of at least 1 ppm in pools and at least 3 ppm in hot tubs; if cyanuric acid is used, CDC recommends at least 2 ppm free chlorine in pools and advises against cyanuric acid in hot tubs (CDC). CDC also recommends testing chlorine and pH at least twice a day, and more often with heavy use.

Southern Nevada adds a second priority: scale. The Las Vegas Valley Water District says its water, mostly from Lake Mead and the Colorado River, is hard because of calcium and magnesium, and lists hardness around 280 parts per million, or 16 grains per gallon (LVVWD water quality report). When water evaporates, dissolved minerals stay behind, and top-off water adds more.

Whether water deposits scale depends on calcium hardness, pH, total alkalinity, temperature and dissolved solids together, In practice:

• Keep pH in the range CDC recommends.
• Watch alkalinity alongside pH.
• Ask your service provider how often to test calcium and dissolved solids, and what they recommend if levels climb. If you drain, SNWA says pool water must go to the sanitary sewer, not the street, and recommends refilling as soon as possible because direct sunlight can damage exposed plaster.
• SNWA says pool covers reduce evaporation by 90 percent, which also means less top-off water.