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Complete Water Systems LLC Business Logo

Complete Water Systems LLC

Trusted Water Treatment and Plumbing Experts in Arizona

Licensed / Bonded / Insured ROC #330440 & 345865

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Licensed Reverse Osmosis Installation for Arizona Homes

We install, service, and maintain 3 to 7 stage drinking water filtration systems — so you never have to worry about water quality again.

25+ Years of Experience

Family-Owned Business

Licensed, Bonded, and Insured

Industry Leading Warranties

Certified Components

The Complete Water Systems Difference

We don’t just install your reverse osmosis system, we service, protect, and maintain it so your water stays clean for years.

Professional Installation & Protection

  • Licensed under-the-sink RO installation

  • Free haul-away of old systems

  • Leak detection & automatic shut-off

  • Proper pressure configuration

Ongoing Service & Maintenance

  • Filter changes & membrane replacements

  • System sanitation & performance checks

  • Tank upgrades and component replacements

Certified Quality & Safety

  • NSF/ANSI-certified components and media

  • Designed for Arizona's harsh water conditions

  • Optional alkaline and UV upgrades available

What Your Neighbors Say About Us

Trusted by Thousands of Arizona Homeowners

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Under-The-Sink Reverse Osmosis Systems

Multiple System Options to Match Your Water Quality & Household Needs — Installed by Arizona Experts

Pro Series 5 Stage

Our most popular system:

  • High-Efficiency 1:1 RO Technology – Uses a Pentair membrane that reduces wastewater by up to 75% compared to standard RO systems, making it more eco-friendly and cost-effective.

  • Powerful Multi-Stage Filtration – Removes sediment, chlorine, chloramines, heavy metals, dissolved solids, and other harmful contaminants common in Arizona water.

  • 75 GPD Performance – Produces plenty of clean, great-tasting water for drinking, cooking, and ice without long wait times.

  • Taste-Enhancing Final Polish – Post-carbon filtration improves flavor and odor for crisp, refreshing water.

  • Built-In Leak Protection – Includes Flow Lok leak detection with automatic shut-off for added safety and peace of mind.

  • Perfect for Everyday Drinking & Cooking – Reliable, low-maintenance performance homeowners love

Pro Series 6 Stage Alkaline

  • All the Benefits of Our Best-Selling 5-Stage System

  • Alkaline Remineralization Stage – Raises pH by 1.0–2.0 and adds beneficial minerals back into your water

  • Healthier, Better-Tasting Water – Smooth taste with balanced mineral content

  • High-Efficiency 1:1 RO System – Reduces wastewater while maintaining exceptional purification

  • FlowLok® Leak Detection Included – Automatic shut-off for added peace of mind

  • Customizable Alkaline Options – Choose alkaline or calcite based on your water goals

Pro Series 7 Stage Alkaline and UV

  • Complete RO + UV Protection – Combines high-efficiency reverse osmosis with germicidal UV light to neutralize bacteria and microorganisms.

  • 1:1 Water-Saving Technology – Uses significantly less wastewater while delivering ultra-clean drinking water.

  • Alkaline Remineralization – Raises pH and adds beneficial minerals for improved taste and balance.

  • Comprehensive Filtration – Reduces sediment, chlorine, chloramines, heavy metals, dissolved solids, and pathogens.

  • Ultimate Peace of Mind – UV + FlowLok® leak protection included

  • Ideal for Extra-Sensitive Households – Perfect for immune-compromised users or added safety

IsoTwist 5 Stage

  • Space-Saving Design – Produces up to 50 GPD while taking up less room than traditional RO systems.

  • Twist-Off Disposable Cartridges – Fast, sanitary filter changes with minimal effort.

  • NSF/ANSI 58 Certified Performance – Significantly reduces arsenic, fluoride, lead, chromium, TDS, and more.

  • Reliable Multi-Stage Filtration – Removes sediment, chlorine, chloramines, and dissolved contaminants.

  • Built-In Leak Protection – Includes Flow Lok automatic shut-off for added safety.

Ultima VII 5 Stage

  • High-Capacity Performance – Produces up to 100 GPD, ideal for moderate to high water usage.

  • Complete Multi-Stage Filtration – Removes sediment, chlorine, heavy metals, dissolved solids, and impurities.

  • USA-Built & Tested – Each system is quality-checked for durability and long-term performance.

  • Leak Protection Included – Flow Lok automatic shut-off adds an extra layer of safety.

Waterdrop G5P700A-PRO Dual-Flow Alkaline Reverse Osmosis Water Filter

  • Dual-Flow Water Delivery – Provides purified water for drinking and cooking while supplying filtered water for everyday household tasks.

  • Advanced 8-Stage Filtration – Helps reduce TDS, PFAS, fluoride, lead, chlorine, heavy metals, and other common contaminants.

  • Alkaline Mineral Enhancement – Improves taste while balancing water pH with beneficial minerals.

  • Efficient 2:1 Waste Ratio – Reduces water waste compared to traditional RO systems.

  • Smart LED Faucet – Real-time TDS monitoring and filter life tracking.

  • Tankless Space-Saving Design – Maximizes under-sink storage space.

  • Ideal for Multi-Purpose Use – Clean drinking water and filtered utility water from one convenient system.

Waterdrop G5P700A Tankless Alkaline Reverse Osmosis Water Filter

  • High-Capacity 700 GPD Performance – Produces fast, on-demand purified drinking water without a bulky storage tank.

  • Advanced 8-Stage Filtration – Helps reduce TDS, PFAS, fluoride, lead, chlorine, heavy metals, and other common contaminants.

  • Alkaline Mineral Enhancement – Balances water pH while improving taste with beneficial minerals.

  • Efficient 2:1 Waste Ratio – Uses less water than traditional reverse osmosis systems.

  • Smart LED Faucet – Displays real-time TDS levels and filter life indicators.

  • Space-Saving Tankless Design – Frees up valuable under-sink storage space.

  • Perfect for Drinking & Cooking – Reliable, low-maintenance performance with clean, great-tasting water.

Waterdrop X Series Reverse Osmosis System, X8

  • Rapid 800 GPD Performance – Delivers purified drinking water quickly for busy households.

  • Advanced 9-Stage Filtration – Helps reduce TDS, PFAS, fluoride, lead, chlorine, microplastics, and other contaminants.

  • Water-Saving 2:1 Efficiency – Uses less water than many traditional reverse osmosis systems.

  • Smart Display Faucet – Real-time TDS monitoring and filter life tracking.

  • Compact Tankless Design – Saves valuable cabinet space under the sink.

  • Long-Life RO Membrane – Up to 24 months of filtration performance.

  • Cleaner, Better-Tasting Water – Reliable everyday drinking water with minimal maintenance.

Waterdrop X Series Dual Flow Reverse Osmosis System, X8-PRO

  • Dual-Flow Water System – Purified water for drinking and cooking plus filtered water for washing and food preparation.

  • High-Speed 800 GPD Production – Fast access to clean, filtered water throughout the day.

  • Advanced 9-Stage Filtration – Helps reduce TDS, PFAS, fluoride, lead, chlorine, and other common contaminants.

  • Eco-Friendly 2:1 Waste Ratio – Designed to reduce water waste while maintaining performance.

  • Smart Display Faucet – Monitors TDS levels and filter life in real time.

  • Tankless Design – Maximizes under-sink storage space.

  • Versatile Everyday Performance – Ideal for households wanting both purified and filtered water.

Waterdrop X Series Reverse Osmosis System, X12

  • Ultra-Fast 1,200 GPD Performance – Produces high volumes of purified water on demand.

  • Advanced 11-Stage Filtration – Helps reduce TDS, PFAS, fluoride, arsenic, lead, chlorine, and other contaminants.

  • Healthy Alkaline Mineral Enhancement – Adds calcium and magnesium while balancing water pH.

  • Efficient 3:1 Pure-to-Drain Ratio – Conserves water compared to traditional RO systems.

  • Smart Faucet Technology – Real-time TDS monitoring and filter life indicators.

  • Tankless Space-Saving Design – Modern under-sink installation without a storage tank.

  • Built for High Water Usage Homes – Fast flow rates with long-lasting filtration performance.

Waterdrop X Series Dual Flow Reverse Osmosis System, X12-PRO

  • Dual-Flow Water Delivery – Purified water for drinking and cooking plus filtered water for washing and food preparation.

  • High-Capacity 1,200 GPD Output – Delivers fast, on-demand purified water.

  • Advanced 11-Stage Filtration – Helps reduce TDS, PFAS, fluoride, arsenic, lead, chlorine, and other contaminants.

  • Healthy Alkaline Minerals – Enhances taste while balancing water pH.

  • Water-Saving 3:1 Efficiency – Designed to reduce wastewater while maintaining high performance.

  • Smart Faucet Monitoring – Tracks TDS levels and filter life in real time.

  • Premium Tankless Design – Maximizes space while delivering purified and filtered water from one system.

Waterdrop Master X Series Reverse Osmosis System, X14

  • Ultra-High Capacity 1,400 GPD Performance – Delivers purified drinking water in seconds.

  • Advanced 11-Stage Filtration – Helps reduce TDS, PFAS, fluoride, arsenic, lead, chlorine, and other contaminants.

  • LED Purification Technology – Provides an additional layer of water quality protection.

  • Healthy Alkaline Mineral Enhancement – Adds calcium and magnesium while balancing water pH.

  • Water-Saving 3:1 Pure-to-Drain Ratio – Reduces water waste and operating costs.

  • Smart Digital Faucet – Real-time TDS monitoring, filter tracking, and precise dispensing.

  • Premium Tankless Design – Fast, convenient, and space-saving performance for modern homes.

Waterdrop X Series Under Sink Reverse Osmosis System, X16

  • Maximum 1,600 GPD Performance – Waterdrop's highest-capacity residential reverse osmosis system.

  • Advanced 11-Stage Filtration – Helps reduce TDS, PFAS, fluoride, arsenic, lead, chlorine, microplastics, and other contaminants.

  • LED Purification Technology – Helps maintain water quality and freshness.

  • Healthy Alkaline Mineral Enhancement – Improves taste while balancing water pH with beneficial minerals.

  • Efficient 3:1 Pure-to-Drain Ratio – Conserves water while delivering exceptional performance.

  • Smart Digital Faucet – Real-time TDS monitoring, filter life tracking, and dispensing control.

  • Designed for Maximum Demand – Ideal for larger households seeking ultra-fast purified drinking water.

Waterdrop T4-A 450 GPD Alkaline Dual-Flow Reverse Osmosis System

  • Dual-Flow Drinking Water Options – Choose between standard RO-purified water and mineral-enhanced alkaline water from one convenient system.

  • Advanced 10-Stage Filtration – Helps reduce TDS, PFOA, PFOS, chlorine, fluoride, lead, Chromium-VI, heavy metals, bad taste and odor, and other common impurities.

  • Alkaline Remineralization – Adds minerals back into purified water for a mineral-enhanced alkaline drinking water option.

  • High-Capacity 450 GPD Performance – Delivers fast, on-demand purified water without relying on a bulky storage tank.

  • Efficient 2:1 Pure-to-Drain Ratio – Produces two cups of purified water for every cup of wastewater to help improve water efficiency.

  • Smart Faucet with Dual LED Function – Provides convenient access to both water options with system-status indicators for each line.

  • Smart Filter Reminders – Alerts you when filter replacement is due to help simplify routine maintenance.

  • Two Water Choices in One Compact System – Combines reverse osmosis purification, alkaline remineralization, and efficient tankless performance for everyday drinking and cooking.

Waterdrop G3P600 Tankless Reverse Osmosis System

  • Advanced 8-Stage Filtration – Helps reduce TDS, PFAS, fluoride, and other common contaminants for cleaner, better-tasting drinking water.

  • High-Capacity 600 GPD Performance – Delivers fast, on-demand purified water and can fill an 8 oz cup in approximately 8 seconds.

  • Efficient 2:1 Pure-to-Drain Ratio – Produces two cups of purified water for every cup of wastewater to help reduce water waste.

  • Space-Saving Tankless Design – Eliminates the bulky storage tank and frees up valuable space underneath the kitchen sink.

  • Smart Faucet Included – Provides convenient access to purified water while displaying useful system information at the faucet.

  • NSF-Certified Performance – Certified to NSF/ANSI 42, 58, and 372 standards for filtration performance, material safety, and lead-free construction.

  • Simple Filter Maintenance – Long-lasting filters feature replacement intervals ranging from approximately 6 months to 24 months depending on the filter.

  • Fast, Efficient Drinking Water for Everyday Use – Combines high-capacity filtration, efficient water use, and a compact design for everyday drinking and cooking.

Waterdrop G3P800 Tankless Reverse Osmosis System

  • Advanced 10-Stage Filtration – Helps reduce fluoride, PFOA and PFOS, TDS, chromium, chlorine, lead, heavy metals, rust, sediment, and other common impurities.

  • High-Capacity 800 GPD Performance – Delivers fast, on-demand purified water and can fill a 6 oz cup in approximately 5 seconds.

  • Efficient 3:1 Pure-to-Drain Ratio – Produces three cups of purified water for every cup of wastewater to help minimize water waste.

  • Space-Saving Tankless Design – Eliminates the bulky storage tank and frees up valuable space underneath the kitchen sink.

  • Smart Faucet Included – Provides convenient access to purified water while displaying useful system information at the faucet.

  • Multi-Certified Performance – Certified to NSF/ANSI 42, 53, 58, and 372 standards.

  • Broad Contaminant Reduction – Designed to reduce taste and odor, large particles, heavy metals, rust, sand, salt, sediments, and additional impurities.

  • Fast, High-Efficiency Drinking Water – Combines strong filtration, high daily capacity, and efficient water use for everyday drinking and cooking.

Waterdrop M6H Instant Hot Countertop Reverse Osmosis System

  • Compact Countertop Reverse Osmosis System – Enjoy purified drinking water without permanent under-sink installation or countertop drilling.

  • Advanced 7-Stage Filtration – Provides reverse osmosis filtration in a convenient countertop design for everyday drinking and cooking.

  • Instant Hot Water on Demand – Heats purified water in seconds with temperature options from room temperature up to 203°F.

  • Customizable Temperature & Volume – Select the right temperature and dispensing amount for baby formula, tea, coffee, oatmeal, and more.

  • 3:1 Pure-to-Drain Ratio – Uses an efficient water production design to help reduce wastewater.

  • Separate Tap & Waste Water Tanks – Keeps incoming and wastewater separated to help prevent backflow pollution.

  • Detachable Glass Pitcher – Makes it easy to dispense, carry, and serve purified water away from the unit.

  • No Under-Sink Installation Required – A flexible option for kitchens, apartments, offices, and other spaces where permanent plumbing modifications are not preferred.

Waterdrop Instant Hot Water Dispenser, Reverse Osmosis System, K6

  • Instant Hot & Purified Water – Adjustable temperatures from 104°F to 203°F provide purified water for coffee, tea, cooking, and more.

  • High-Capacity 600 GPD Performance – Delivers fast, on-demand purified water without a bulky storage tank.

  • Advanced 5-Stage Filtration – Helps reduce TDS, fluoride, heavy metals, chlorine, and other common contaminants.

  • Efficient 2:1 Waste Ratio – Uses less water than many traditional reverse osmosis systems.

  • Smart Display Faucet – Monitors real-time TDS levels, filter life, and water temperature.

  • Built-In Safety Features – Includes a child safety lock, temperature alerts, and dry-burn protection for added peace of mind.

  • Perfect for Everyday Drinking & Cooking – Compact, low-maintenance performance with instant hot, purified water whenever you need it.

TITAN Water Selector

  • No Additional Faucet Required – Connects your RO or filtration system directly to your existing kitchen faucet.

  • One-Touch Water Selection – Instantly switch between tap water and filtered water.

  • No Countertop Drilling Needed – Preserves countertop space and simplifies installation.

  • Full Water Pressure in Tap Mode – No reduction in flow during normal faucet use.

  • Automatic Reset Function – Returns to tap water mode when the faucet is turned off.

  • Compatible with Most Under-Sink Filtration Systems – Works with reverse osmosis and carbon filtration systems.

  • Perfect for Apartments & Rentals – Enjoy filtered water without adding a separate drinking water faucet.

Three Stage Filter

  • Fresh-Tasting Water Without RO – Improves taste and odor while preserving essential minerals.

  • Targeted Contaminant Reduction – Filters sediment, chlorine, chloramines, VOCs, cysts, and scale-causing minerals.

  • No Tank or Extra Faucet Needed – Connects directly to your cold water line for a clean, simple setup.

  • NSF Certified Components – Trusted filtration performance with easy installation.

  • Low Maintenance Solution – Ideal for homeowners who want better water without RO complexity.

Faucet Selection

Standard under sink installation is included,  drilling a faucet hole is additional $100.00

103 Style Faucet

103 Style Faucet

103 Chrome – Default Included Option

103 Brush Nickel - Optional 

905 Brushed Nickel Reverse Osmosis Faucet

905 Style Faucet - $75

905 Chrome

905 Brush Nickel

905 Black

905 White

905 Antique Bronze

905 Oil Rubbed Bronze

905 Matte Black

888 Style Faucet

888 Style Faucet - $85

888 Chrome

888 Brush Nickel

888 Antique Bronze ($110)

888 Matte Black

603 Style Reverse Osmosis Faucet

603 Style Faucet - $75

603 Chrome

603 Brush Nickel

603 White

603 Antique Bronze

603 Oil Rubbed Bronze

703 Style Faucet

703 Style Faucet - $85

603 Chrome

603 Brush Nickel

603 White

603 Antique Bronze

603 Oil Rubbed Bronze

Faucet Finishes

Available Faucet Finishes

Reverse Osmosis Installation

Why Choose Us?

Trusted for 25+ YearsFamily-owned and serving Arizona with expert water filtration solutions.

Pure, Great-Tasting WaterHigh-quality reverse osmosis systems for clean, contaminant-free water.

Licensed & Insured Technicians Professional installation with guaranteed reliability.

Installed Price Locked In – Know your final installed cost before we schedule, backed by our best price guarantee.

Easy Financing AvailableFlexible plans (3 to 60 months, 0%–35.9% APR) so you can pay in installments. Call us to learn more!

Frequently Asked Questions

Start Your Home's Water Transformation - Call Us or Get a Free Estimate Today!

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We've Got You Covered

We proudly serve all of Arizona with expert water filtration and plumbing services. From Phoenix to every corner of the state, we're here to ensure you have clean, safe water whenever you need it.

North Phoenix Area

Anthem

New River

Carefree

Cave Creek

Glendale

Paradise Valley

Peoria

Phoenix

Scottsdale

South Phoenix Area

Avondale

Chandler

Guadalupe

Queen Creek

San Tan Valley

Sun Lakes

Tempe

West Phoenix Area

Buckeye

El Mirage

Goodyear

Litchfield Park

Morristown

Sun City

Sun City West

Surprise

Tolleson

Youngtown

East Phoenix Area

Apache Junction

Fountain Hills

Gilbert

Mesa

Rio Verde

Others with Dispatch Fee

Casa Grande

Dewey-Humboldt

Eloy

Florence

Maricopa

Prescott

Prescott Valley

Sedona

Wickenburg

Gold Canyon

Flagstaff

Payson

Coolidge

Licensed / Bonded / Insured ROC #330440 & 345865, © 2026 Complete Water Systems LLC,

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