Best Water Softener for Phoenix, AZ — 17 Things to Know BEFORE You Buy!

Written by Craig "The Water Guy" Phillips

1. The Local Water Problem in Phoenix, AZ

Your Phoenix water heater is dying faster than it should, and the culprit flows through your pipes 24 hours a day. At 12.3 grains per gallon (GPG), Phoenix delivers some of the hardest municipal water in the United States — water so mineral-heavy that it's classified as "extremely hard" by every industry standard.

To understand what 12.3 GPG means for your home, imagine your plumbing system as a network of arteries. Every gallon of Phoenix water carries 12.3 grains of dissolved calcium and magnesium — minerals that crystallize and accumulate like plaque in human arteries. One grain equals about 17.1 milligrams, so each gallon flowing through your Phoenix home deposits roughly 210 milligrams of rock-hard scale throughout your system.

Phoenix draws its water supply primarily from the Salt River Project reservoir system and the Colorado River via the Central Arizona Project canal. As this surface water travels across Arizona's mineral-rich desert geology, it dissolves massive quantities of limestone, gypsum, and caliche deposits. By the time it reaches Phoenix taps, the water carries an extraordinary mineral load that turns every appliance, pipe, and fixture into a battleground.

For Phoenix homeowners, 12.3 GPG hardness isn't just a water quality issue — it's a financial emergency happening in slow motion. Your water heater efficiency drops by 15-20% per year. Appliances fail decades early. Monthly utility bills climb as scale-clogged systems work harder to deliver the same performance. The "extremely hard" classification means Phoenix residents face the most severe category of mineral-related home damage possible.

2. What 12.3 GPG Does to Your Home

At Phoenix's 12.3 GPG hardness level, calcium carbonate doesn't just coat your appliances — it encases them in mineral armor that destroys efficiency and shortens lifespans dramatically. Inside your water heater, dissolved calcium and magnesium crystallize into rock-hard scale the moment water temperatures exceed 140°F. This scale forms concentric rings on heating elements and tank walls, creating an insulating barrier that forces your system to work exponentially harder.

A standard 40-gallon electric water heater in Phoenix typically loses 30-40% of its heating efficiency within 18-24 months of installation at 12.3 GPG. Gas water heaters suffer even worse damage as scale accumulates on the heat exchanger surfaces where temperatures reach 180°F or higher. Phoenix homeowners report water heater replacements every 6-8 years compared to the 10-12 year national average — a direct result of extreme mineral buildup accelerated by Arizona's year-round hot climate.

The pipe damage timeline in Phoenix homes follows a predictable pattern at 12.3 GPG hardness. Copper pipes develop measurable scale buildup within 3-4 years, with noticeable flow restriction appearing by year 7-10. Older galvanized steel pipes — common in Phoenix neighborhoods built before 1980 — face catastrophic narrowing within 5-7 years as iron corrosion combines with calcium deposits to create concrete-hard blockages.

Appliance manufacturers have specific warnings about Phoenix's water hardness. Tankless water heater warranties from Rinnai, Navien, and Rheem require annual descaling service above 7 GPG — and most void coverage entirely without a softener above 10 GPG. At Phoenix's 12.3 GPG level, tankless units can fail within 2-3 years without protection, turning a 20-year investment into an expensive mistake.

The soap and detergent waste in Phoenix homes is mathematically severe. At 12.3 GPG, calcium and magnesium ions react with soap molecules to form insoluble scum rather than cleansing lather. Phoenix families typically use 3-4 times more laundry detergent, dish soap, and shampoo compared to soft-water cities. For a typical Phoenix household, this compounds into $400-600 annually in extra soap and cleaning product costs.

Phoenix residents frequently report skin and hair problems that correlate directly with the city's extreme water hardness. Calcium ions at 12.3 GPG concentrations strip natural moisture from skin and create mineral deposits on hair shafts that leave strands feeling coarse and brittle. Dermatologists in the Phoenix area report higher rates of eczema and contact dermatitis, conditions that often improve dramatically when patients install whole-house water softening systems.

The laundry damage in Phoenix homes is both immediate and permanent. Mineral deposits embed in fabric fibers, creating grey, stiff, scratchy clothing that looks aged after just months of washing. White clothing develops a characteristic grey cast as calcium carbonate particles settle into cotton and linen weaves. Dishwasher interiors show irreversible etching on glass surfaces above 12 GPG — damage that no amount of cleaning can repair.

The total annual "hard water tax" for a Phoenix household at 12.3 GPG approaches $1,200-1,800 when combining increased energy costs, accelerated appliance depreciation, excess soap consumption, and premature plumbing repairs. This figure doesn't include the hidden costs: reduced home value from damaged fixtures, emergency plumber calls for clogged pipes, and the time lost dealing with mineral-related maintenance issues.

3. Phoenix's Specific Contaminant Profile

Beyond Phoenix's devastating 12.3 GPG hardness baseline, residents also contend with chloramine, fluoride, and lead contamination — each of which interacts with extreme mineral concentrations in problematic ways. This layered water quality challenge requires understanding how multiple contaminants compound the damage already caused by exceptional hardness levels.

Chloramine in Phoenix Water

Phoenix water treatment facilities switched from chlorine to chloramine disinfection in the early 2000s, introducing a more stable but harder-to-remove chemical into the municipal supply. Chloramine forms when ammonia bonds with chlorine, creating a disinfectant that doesn't break down as quickly as chlorine alone. While this provides better disinfection throughout Phoenix's extensive distribution system, it creates long-term problems for residents.

At Phoenix's 12.3 GPG hardness level, chloramine becomes more chemically reactive with metal surfaces. The combination of extreme mineral content and chloramine accelerates corrosion of copper pipes and brass fittings throughout Phoenix homes. This accelerated corrosion releases more metal ions into the water supply while creating rough pipe surfaces where calcium and magnesium deposits anchor more aggressively.

Phoenix residents often describe a distinctive "medicinal" or "band-aid" odor in their tap water — the signature smell of chloramine. Unlike chlorine, which evaporates from water left in open containers, chloramine remains stable and requires catalytic carbon filtration for removal. Standard activated carbon filters that work for chlorine are ineffective against Phoenix's chloramine-treated water.

The EPA allows chloramine levels up to 4.0 mg/L in drinking water, and Phoenix typically maintains concentrations between 1.5-3.0 mg/L throughout the distribution system. Chloramine poses specific risks to dialysis patients and can be toxic to fish and amphibians, requiring special filtration for aquarium owners throughout Phoenix. A salt-based water softener like the SoftPro Elite HE addresses the hardness but requires a separate catalytic carbon system for chloramine removal.

Fluoride in Phoenix Water

Phoenix adds fluoride to municipal water at approximately 0.7 mg/L following CDC recommendations for dental health benefits. This intentional addition occurs at the water treatment plant level, making fluoride present in virtually all tap water throughout the Phoenix metropolitan area. The compound used is typically fluorosilicic acid, a byproduct of phosphate fertilizer manufacturing.

The interaction between Phoenix's 12.3 GPG hardness and fluoride creates unique challenges for residents with fluoride sensitivity. High mineral content can make fluoride taste more prominent, and the combination may contribute to increased mineral deposits on teeth and dental work. Some Phoenix residents report a chalky aftertaste that results from fluoride binding with calcium ions at high hardness levels.

EPA regulations set the maximum allowable fluoride level at 4.0 mg/L for health protection and 2.0 mg/L for aesthetic concerns. Phoenix maintains fluoride well below these thresholds, but residents seeking fluoride removal must understand that water softeners do NOT remove fluoride from the water supply. Ion exchange resin in softening systems targets calcium and magnesium specifically — fluoride ions pass through unchanged.

For Phoenix homeowners concerned about fluoride consumption, a reverse osmosis system at the kitchen sink provides effective removal while allowing the SoftPro Elite HE to handle whole-house hardness treatment. This two-stage approach addresses both Phoenix's extreme mineral content and fluoride concerns without compromising either treatment goal.

Lead in Phoenix Water

Lead contamination in Phoenix homes originates primarily from pre-1986 plumbing systems, solder joints, and service lines rather than the source water itself. The city's water supply contains virtually no lead when it leaves treatment facilities, but picks up lead contamination as it travels through aging infrastructure and home plumbing systems throughout Phoenix's older neighborhoods.

Phoenix's 12.3 GPG hardness creates a complex relationship with lead exposure that many residents don't understand. Moderate hardness levels actually form a protective calcium carbonate coating inside lead pipes and solder joints, reducing lead leaching into the water supply. However, this protective effect breaks down at extreme hardness levels like Phoenix experiences, where excessive scale buildup creates corrosive conditions.

The EPA action level for lead in drinking water is 15 parts per billion (ppb), measured at the tap after water has contacted plumbing materials. Phoenix conducts regular lead testing throughout the distribution system, with results typically showing 90th percentile levels well below the action threshold. However, individual homes — particularly those built before 1986 — may experience elevated lead levels depending on their specific plumbing configuration.

Installing a water softener in Phoenix homes with lead plumbing requires careful consideration. Softened water can dissolve the protective mineral coating inside lead pipes, potentially increasing lead levels temporarily after installation. Phoenix homeowners with pre-1986 plumbing should conduct lead testing before and 30 days after softener installation to monitor any changes in lead exposure levels.

The SoftPro Elite HE water softener does NOT remove lead from drinking water — ion exchange resin targets hardness minerals specifically. Phoenix residents concerned about lead exposure should install an NSF/ANSI 53-certified point-of-use filter at their kitchen sink regardless of whole-house water treatment choices.

4. Why Most Phoenix Homeowners Pick the Wrong Softener

Walking through Phoenix home improvement stores, you'll find dozens of water softeners promising to solve hard water problems — but most are fundamentally inadequate for the city's extreme 12.3 GPG hardness level. After 15 years of covering water quality issues across Arizona, I've identified four critical mistakes that cost Phoenix homeowners thousands in failed installations and ongoing damage.

Mistake #1: Buying on price alone without understanding grain capacity demands. A 24,000-grain softener that performs adequately in Tucson (7.8 GPG) or Flagstaff (4.2 GPG) will exhaust its resin capacity within 2-3 days in Phoenix at 12.3 GPG. The mathematical reality is unforgiving: higher hardness levels demand proportionally larger grain capacities, longer regeneration cycles, and more robust resin beds. Phoenix homeowners who buy undersized units face constant regeneration, salt waste, and breakthrough hardness during peak demand periods.

Mistake #2: Confusing water softeners with comprehensive filtration systems. Softeners excel at one specific task: removing calcium and magnesium through ion exchange. They do NOT reliably remove chloramine, fluoride, or lead from Phoenix's water supply. Residents dealing with both 12.3 GPG hardness and Phoenix's chloramine disinfection need a two-stage approach: the SoftPro Elite HE for mineral removal plus a catalytic carbon system for chloramine treatment. Expecting one system to solve multiple water quality issues leads to disappointment and continued problems.

Mistake #3: Ignoring the grain capacity math that determines system sizing. The formula is straightforward but critical: [Household members] × 75 gallons per person per day × 12.3 GPG = daily grain demand. For a typical Phoenix family of four: 4 × 75 × 12.3 = 3,690 grains consumed daily. Multiplied by seven days equals 25,830 grains weekly. Add a 20% buffer for high-usage periods, and you need approximately 31,000 grains of capacity minimum. Many Phoenix homeowners discover this math only after their undersized system fails.

Mistake #4: Overlooking salt efficiency ratings that compound operating costs. At Phoenix's 12.3 GPG hardness level, softeners regenerate 2-3 times more frequently than in moderate hardness cities. An inefficient system using 15 pounds of salt per regeneration versus an efficient model using 6-8 pounds creates a dramatic cost difference over time. Phoenix's extreme hardness amplifies every efficiency advantage or disadvantage — over 10 years, this compounds into $800-1,200 in additional salt costs for inefficient systems.

5. The SoftPro Elite HE: Built for Phoenix's Water

After evaluating Phoenix's water hardness of 12.3 GPG and the presence of chloramine, fluoride, and lead in the local supply, one system consistently rises to the top for Phoenix homeowners: the SoftPro Elite HE Water Softener. This isn't marketing hyperbole — it's the logical conclusion drawn from matching system capabilities to Phoenix's specific water challenges.

The SoftPro Elite HE uses true salt-based ion exchange technology, which is the only method capable of handling Phoenix's extreme 12.3 GPG hardness effectively. Salt-free "conditioner" systems marketed throughout Arizona do not actually remove calcium and magnesium from water — they attempt to change crystal structure through template-assisted crystallization or electromagnetic fields. At Phoenix's hardness level, these alternative technologies simply cannot prevent scale formation. The SoftPro's cation exchange resin physically captures calcium and magnesium ions, replacing them with sodium ions to deliver genuinely soft water.

Demand-initiated regeneration (DIR) becomes operationally essential at Phoenix's hardness level, not merely convenient. Traditional timer-based systems regenerate on predetermined schedules regardless of actual water usage or resin condition. At 12.3 GPG, this approach creates two costly problems: premature regeneration wastes salt and water, while delayed regeneration allows hard water breakthrough during high-demand periods. The SoftPro Elite HE monitors actual water usage and resin capacity, regenerating only when the media approaches exhaustion.

NSF/ANSI Standard 44 certification provides Phoenix residents with verified performance data rather than manufacturer claims. This third-party testing confirms the resin meets strict performance benchmarks for hardness removal efficiency, structural integrity, and materials safety. For Phoenix homeowners already managing chloramine, fluoride, and potential lead exposure, knowing their softening system doesn't introduce additional contaminants is crucial for water safety confidence.

The SoftPro Elite HE offers grain capacity options specifically suited to Phoenix's extreme hardness: 32,000, 48,000, 64,000, and 80,000-grain configurations. For a typical four-person Phoenix household consuming 3,690 grains daily, the 48,000-grain model provides optimal regeneration intervals of 7-10 days while maintaining a 20% capacity buffer for high-usage periods. Larger households or homes with high water consumption can select the 64K or 80K models without compromising efficiency.

The 10-year warranty coverage addresses Phoenix homeowners' legitimate concerns about resin longevity under extreme hardness stress. At 12.3 GPG, ion exchange resin processes more minerals daily than systems in moderate hardness cities process weekly. This accelerated cycling can degrade resin performance over time, making warranty protection essential during the highest-stress operational years. SoftPro backs their resin quality with a decade of coverage specifically because they engineer systems for high-hardness applications.

The SoftPro Elite HE includes a self-cleaning sediment pre-filter that protects resin life in cities where particulate and mineral hardness both challenge system performance. Phoenix's extensive distribution system and aging infrastructure can introduce sediment that would otherwise foul resin beads and reduce softening capacity. The integrated pre-filter captures particulate before it reaches the resin tank, maintaining consistent performance throughout the system's service life.

For Phoenix households dealing with 12.3 GPG of water hardness and the compounding presence of chloramine, fluoride, and lead, the SoftPro Elite HE is not a comfort upgrade — it is infrastructure protection for your home. The system's engineering matches the severity of Phoenix's water challenges, providing the capacity, efficiency, and durability required for long-term success in an extreme hardness environment.

6. How to Size Your Softener for Phoenix

Proper sizing for Phoenix's 12.3 GPG hardness follows a precise mathematical formula that accounts for the city's extreme mineral load. Undersized systems fail quickly in Phoenix, while oversized units waste salt and water through excessive regeneration cycles. Follow these steps to determine the correct grain capacity for your household.

Step 1: Count all household members, including children and frequent long-term guests.

Step 2: Multiply by 75 gallons per person per day (industry standard for residential consumption).

Step 3: Multiply household gallons × 12.3 GPG = daily grain demand.

Step 4: Multiply daily grains × 7 = weekly grain demand.

Step 5: Add 20% buffer for high-usage days, guests, and seasonal variation.

Step 6: Match result to SoftPro Elite HE grain tier (32K/48K/64K/80K).

Here's the calculation worked out for a typical four-person Phoenix household:

Step 1: 4 people

Step 2: 4 × 75 = 300 gallons per day

Step 3: 300 × 12.3 = 3,690 grains consumed daily

Step 4: 3,690 × 7 = 25,830 grains weekly

Step 5: 25,830 + 20% = 31,000 grains total capacity needed

Step 6: Select SoftPro Elite HE 48K model (provides 48,000 grains)

This sizing delivers regeneration cycles every 7-10 days, which maximizes salt efficiency while preventing resin exhaustion during Phoenix's peak summer water usage periods. Regenerating more frequently than every 5 days wastes salt and water; regenerating less than every 12 days risks hard water breakthrough when demand spikes above average consumption.

7. Installation in Phoenix: What to Know

Arizona state law does not require licensed plumber installation for water softeners, but Phoenix's extreme hardness makes proper installation critical for system success. Many Phoenix homeowners choose professional installation to ensure correct sizing, placement, and initial programming — mistakes that seem minor in moderate hardness cities become costly failures at 12.3 GPG.

The SoftPro Elite HE must be installed on the main water line after the shutoff valve but before the water heater. This placement ensures all household water receives treatment while protecting the water heater from scale damage. In Phoenix homes, this typically means installation in the garage, utility room, or exterior side yard where the main line enters the structure. The system requires 110V electrical connection for the control valve and adequate space for salt loading access.

Regeneration discharge planning is crucial in Phoenix due to the high volume of brine produced during frequent regeneration cycles. The system needs a drain line connection capable of handling 40-60 gallons of discharge every 7-10 days. Phoenix municipal code allows softener discharge to residential sewer connections, but the drain line must be properly sized and sloped to prevent backups during regeneration.

Phoenix municipal water pressure typically ranges between 45-65 PSI throughout most residential areas, which falls within the SoftPro Elite HE's optimal operating range of 25-80 PSI. However, some newer Phoenix developments and hillside locations may experience higher pressure that requires a pressure-reducing valve upstream of the softener. Excessive pressure can damage control valves and reduce resin life at Phoenix's already-demanding hardness levels.

At Phoenix's 12.3 GPG hardness level, salt type selection directly impacts system performance and maintenance requirements. Evaporated salt pellets provide the highest purity and lowest residue formation — essential for systems operating under continuous high-hardness stress. Solar salt crystals, while less expensive, contain higher impurity levels that can accelerate brine tank fouling and reduce regeneration efficiency in extreme hardness applications. Phoenix homeowners should use only evaporated pellets to maximize system life and minimize maintenance.

Salt level monitoring becomes more critical in Phoenix due to accelerated consumption rates. At 12.3 GPG, expect to check salt levels monthly during winter months and bi-weekly during summer peak usage periods. The brine tank should maintain salt levels above the water line at all times — salt depletion in Phoenix can cause rapid resin fouling that requires expensive professional cleaning.

8. Maintenance Schedule for Phoenix Homeowners

Phoenix's 12.3 GPG hardness demands a more intensive maintenance schedule than moderate hardness cities require. The extreme mineral load accelerates wear on all system components while increasing salt consumption and regeneration frequency. Following this calibrated maintenance calendar prevents costly repairs and maintains optimal performance.

Monthly Phoenix Maintenance Tasks:

• Check salt level — consumption is high at 12.3 GPG, requiring 15-20 pounds monthly for typical households
• Inspect for salt bridges — a hard crust forming above the water line that prevents proper brine formation
• Verify bypass valve remains in service position — accidental bypass allows hard water throughout the home
• Test regeneration cycle completion — control display should show "service" mode, not error codes

Every 3 Months:

• Clean brine tank interior surfaces to remove mineral residue and salt deposits
• Test post-softener water hardness with test strips — confirm readings below 1 GPG consistently
• Inspect sediment pre-filter and clean if particle buildup is visible
• Check drain line for proper flow — regeneration backwash should drain quickly without backup

Annual Maintenance Requirements:

• Complete brine tank cleaning with full salt removal and interior scrubbing
• Resin bed performance evaluation — if post-softener hardness creeps above 1 GPG, resin may need cleaning
• Control valve inspection for proper cycling and timing accuracy
• Regeneration cycle audit — confirm salt dose and timing remain optimal for current usage patterns

Every 5 Years — Critical for Phoenix:

• Resin replacement assessment — Phoenix's 12.3 GPG accelerates resin degradation compared to moderate hardness cities
• Complete system performance audit including flow rates, pressure drops, and efficiency measurements
• Control valve rebuild or replacement consideration based on cycle count and performance

Phoenix residents should establish baseline water testing before installation, then retest 30 days after to confirm proper system operation. Annual testing thereafter helps identify performance degradation before it becomes costly system failure. Home test kits provide adequate monitoring for hardness levels, while professional testing every 2-3 years can detect other water quality changes throughout Phoenix's distribution system.

9. What to Do Next: Phoenix Action Plan

Take these immediate steps to address Phoenix's 12.3 GPG hardness and protect your home investment:

Week 1: Assessment and Planning

• Inspect your water heater for white scale buildup on visible connections and fittings
• Check for white spotting on glassware, shower doors, and bathroom fixtures
• Calculate your household's daily grain demand using the formula in Section 6
• Determine installation location and verify drain line access for regeneration discharge

Week 2: System Research and Quotes

• Compare SoftPro Elite HE grain capacities against your calculated demand
• Get installation quotes from 2-3 Phoenix-area water treatment professionals
• Verify electrical requirements and any needed permits with Phoenix development services
• Research catalytic carbon options if chloramine taste/odor concerns exist

10. Frequently Asked Questions for Phoenix Residents

10. Is Phoenix's water at 12.3 GPG dangerous to drink?

Phoenix's 12.3 GPG hardness is not dangerous for consumption — it's a mineral content issue, not a safety concern. The EPA doesn't regulate hardness levels because calcium and magnesium are essential nutrients. However, the extreme mineral load creates serious problems for plumbing, appliances, and household cleaning throughout Phoenix homes.

11. Will a water softener remove chloramine from Phoenix water?

No, the SoftPro Elite HE removes calcium and magnesium through ion exchange but does not remove chloramine disinfectant. Phoenix residents concerned about chloramine taste, odor, or effects need a separate catalytic carbon whole-house filter installed alongside the softener. Standard activated carbon filters are ineffective against chloramine — catalytic carbon is specifically required.

12. How much salt will I use per month in Phoenix at 12.3 GPG?

A typical Phoenix household consumes 15-20 pounds of salt monthly due to frequent regeneration cycles required by 12.3 GPG hardness. During summer months when water usage peaks, consumption may reach 25-30 pounds monthly. This translates to approximately $8-15 monthly in salt costs using high-quality evaporated pellets recommended for Phoenix's extreme hardness.

13. Does Phoenix require a permit to install a water softener?

Phoenix does not require permits for standard residential water softener installation when connected to existing plumbing systems. However, if installation requires new electrical circuits, major plumbing modifications, or exterior connections, separate permits may be required. Check with Phoenix development services if your installation involves structural or electrical changes beyond basic plumbing connections.

14. Why does soft water feel slippery in the shower?

Soft water feels slippery because it allows your skin's natural oils to remain instead of being stripped away by calcium ions. Phoenix residents accustomed to 12.3 GPG hardness often notice this change immediately after softener installation. The slippery feeling indicates the system is working properly — your skin is experiencing its natural moisture without mineral interference for the first time.

15. How quickly will I see results after installing a softener in Phoenix?

Phoenix homeowners typically notice immediate improvements in soap lathering and reduced spotting within 24-48 hours of installation. Existing scale deposits throughout the home will gradually dissolve over 2-6 months as soft water circulation breaks down mineral buildup. Water heater efficiency improvements become measurable within 30-60 days as scale stops accumulating on heating elements.

16. Can the SoftPro Elite HE handle Phoenix's water without a separate filter?

The SoftPro Elite HE effectively treats Phoenix's 12.3 GPG hardness without additional equipment. However, residents concerned about chloramine taste/odor, lead exposure from older plumbing, or fluoride consumption should consider complementary treatment systems. The softener addresses mineral hardness completely — other contaminants require specialized filtration technologies for effective removal.

17. Final Verdict for Phoenix

Phoenix's hardness of 12.3 GPG demands industrial-grade treatment, not residential convenience products. The city's "extremely hard" classification represents the most severe category of mineral-related home damage, requiring water treatment systems engineered specifically for continuous high-hardness operation.

Chloramine disinfection, fluoride addition, and potential lead exposure compound the hardness problem in ways that affect both system selection and household water safety. Phoenix residents need comprehensive water treatment strategies that address multiple contaminants while prioritizing the immediate threat posed by extreme mineral content.

The SoftPro Elite HE rises above other options because its demand-initiated regeneration prevents hard water breakthrough during Phoenix's intense summer usage periods, its NSF-certified resin handles continuous 12.3 GPG operation, and its grain capacity options provide proper sizing for households consuming 3,000+ grains daily. These aren't marketing features — they're operational necessities for success in Phoenix's water environment.

Check current SoftPro Elite HE pricing and available grain capacities for Phoenix households dealing with extreme hardness challenges. The investment protects appliances worth thousands of dollars while eliminating the ongoing costs of scale damage, efficiency loss, and accelerated replacement cycles that define homeownership in a 12.3 GPG hardness city.

From the Salt River reservoirs to the taps throughout the Valley of the Sun, Phoenix homeowners face water challenges as intense as the Arizona desert itself — but the right treatment system turns that challenge into crystal-clear confidence.