Financing As Low As 0% APR
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
Under-The-Sink Reverse Osmosis Systems
Multiple System Options & Brands to Match Your Household Needs — Installed by Arizona Experts
Traditional Under-Sink Reverse Osmosis Systems
Reliable under-sink reverse osmosis systems designed for homeowners who want proven filtration, dependable performance, and straightforward maintenance. These systems use traditional storage-tank designs and offer a range of filter configurations, efficiency levels, and faucet options.
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
Price Fully Installed
$795.00
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.
Price Fully Installed
$850.00 for Standard/Certified $895.00 High Efficiency
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.
Price Fully Installed
$795.00
Alkaline & UV Reverse Osmosis Systems
Reverse osmosis systems with additional treatment stages for homeowners looking for more than standard filtration. These options add alkaline remineralization, UV treatment, or both to provide enhanced drinking water treatment after the reverse osmosis process.
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
Price Fully Installed
$895.00
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
Price Fully Installed
$995.00
Smart Tankless Reverse Osmosis Systems
Modern tankless reverse osmosis systems designed to save under-sink space while providing fast water production, efficient pure-to-drain ratios, and advanced filtration. Many models also include smart faucets, high daily output, and additional features such as alkaline remineralization.
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.
Price Fully Installed
$800.00
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.
Price Fully Installed
$975.00
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.
Price Fully Installed
$1,265.00
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.
Price Fully Installed
$1,555.00
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.
Price Fully Installed
$1,700.00
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.
Price Fully Installed
$800.00
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.
Price Fully Installed
$1085.00
Dual-Flow Reverse Osmosis Systems
Advanced dual-flow reverse osmosis systems that provide two water options from a single under-sink setup. Depending on the model, homeowners can choose between purified RO water and either filtered or mineral-enhanced alkaline water for greater flexibility in the kitchen.
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.
Price Fully Installed
$825.00
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.
Price Fully Installed
$1,150.00
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.
Price Fully Installed
$1,385.00
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.
Price Fully Installed
$650.00
Instant Hot & Countertop Reverse Osmosis Systems
Convenient reverse osmosis systems designed for homeowners who want purified water with added flexibility. This category includes instant-hot under-sink systems and countertop options that provide purified drinking water without requiring a traditional storage tank or permanent under-sink installation.
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
Price Fully Installed
$795.00
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.
Price Fully Installed
$850.00 for Standard/Certified $895.00 High Efficiency
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.
Price Fully Installed
$795.00
Specialty Drinking Water Filtration Options
Additional drinking water solutions for homeowners looking for alternatives to a standard reverse osmosis system. These options include non-RO filtration and accessories designed to simplify how filtered water is delivered and used in the kitchen.
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.
Price Fully Installed
$225.00
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.
Price Fully Installed
$575.00
Faucet Selection
Standard under sink installation is included, drilling a faucet hole is additional $100.00
103 Style Faucet
103 Chrome – Default Included Option
103 Brush Nickel - Optional
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 - $85
888 Chrome
888 Brush Nickel
888 Antique Bronze ($110)
888 Matte Black
603 Style Faucet - $75
603 Chrome
603 Brush Nickel
603 White
603 Antique Bronze
603 Oil Rubbed Bronze
703 Style Faucet - $85
603 Chrome
603 Brush Nickel
603 White
603 Antique Bronze
603 Oil Rubbed Bronze
Available Faucet Finishes
Why Choose Us?
Trusted for 25+ Years – Family-owned and serving Arizona with expert water filtration solutions.
Pure, Great-Tasting Water – High-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 Available – Flexible plans (3 to 60 months, 0%–35.9% APR) so you can pay in installments. Call us to learn more!
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,
By contacting our business or submitting your information, you consent to our Privacy Policy.