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Zenith 800 GPD Tankless Reverse Osmosis System Bundle Promo

Model: Guardian ZPS-RO800

✔ Save $1000 fully installed
✔ +2 years of warranty
✔ +2 way tap upgrade +
✔ Complimentary water test
✔ First year filter pack

T&C apply

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$1,199

$2,199

Key Features

✅ 800 GPD fast flow
✅ Alkaline remineralized filtration
✅ Real time TDS display
✅ Space saving tankless design

Certifications

The Guardian RO800 uses independently tested components that meet applicable NSF/ANSI standards:

NSF/ANSI 42 & 53 — Carbon filtration components
NSF/ANSI 58 & 61 — Reverse osmosis membrane and drinking-water contact materials
NSF/ANSI 372 — Lead-free construction requirements

Testing and certification apply to individual components supplied by their respective manufacturers.

Book Your RO Now - Save $1000

Fully Installed + 2 years Warranty + 2 Way Tap Upgrade
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LIMITED JULY RO OFFER

Better Water Starts With a Free Water Test

$1,199 for the complete install, was $2,199

Get cleaner, better-tasting drinking water with a premium RO800 system professionally installed by local Indianapolis water experts. Save up to $1,000 through July 30 while availability lasts.

SMART, HIGH-OUTPUT DRINKING WATER

Guardian RO800 Smart Tankless Reverse Osmosis System

The Guardian RO800 is an 800 GPD tankless reverse osmosis system designed to provide cleaner, fresher-tasting water on demand. Its compact under-sink design eliminates the need for a bulky storage tank, helping preserve valuable cabinet space while delivering reliable water for drinking, cooking, coffee, and ice.

Its advanced multi-stage filtration uses sediment, carbon, and an ultra-fine RO membrane to help reduce PFAS, lead, chlorine, fluoride, arsenic, dissolved solids, VOCs, and substances that affect water taste and odor. Integrated smart monitoring displays water quality and remaining filter life for easier maintenance.

Learn More

System Type: Tankless reverse osmosis
Installation Location: Under-sink (kitchen)
Approximate Dimensions: 5.3 × 14.7 × 15.5 inches
Rated Capacity: Up to 800 GPD
Tested Flow Rate: Up to 0.56 GPM
Drain Ratio: Approx. 2:1 (purified water : wastewater)
Operating Pressure: 20–80 psi
Power Requirement: Electric pump system (standard outlet)
Application: Residential drinking & cooking water

800 GPD High-Output Tankless RO System

Ultra-Fine 0.0001-Micron RO Filtration

Real-Time Water Quality & Filter Monitoring

Space-Saving Design With Efficient 2:1 Drain Ratio

2:1 PURE-TO-DRAIN RATIO + WATER-SAVING PERFORMANCE

2:1 Pure-to-Drain Ratio for Smarter RO Water Use

The Guardian RO800 features a 2:1 pure-to-drain ratio, helping reduce water waste while delivering high-output reverse osmosis filtration. For every 2 cups of purified water produced, only 1 cup goes to drain, making it a more efficient choice than many traditional RO systems.

This advanced tankless RO design helps homeowners enjoy cleaner drinking water with improved efficiency, better daily convenience, and less wasted water. It’s a smart solution for under-sink filtration where performance and water savings both matter.

Learn More

Guardian RO uses an ultra-fine RO membrane to purify your water in multiple stages, leaving you with water that tastes better, is clearer, and better protects your clothes and appliances.

Guardian RO is designed to significantly reduce:

Sediment and fine particles
Chlorine and chloramine
Fluoride
Lead and other heavy metals
Arsenic
Dissolved solids (TDS)
Limescale and mineral-related buildup
VOCs (volatile organic compounds)
Taste- and odor-causing substances

Actual contaminant reduction depends on incoming water quality, operating conditions, and proper maintenance.

2:1 pure-to-drain ratio

2 cups purified water : 1 cup drain water

Water-saving tankless RO design

Efficient filtration with less wastewater

800 GPD HIGH-OUTPUT PERFORMANCE

Fast, Reliable RO Water for Busy Households

The Guardian RO800 delivers filtration capacity of up to 800 gallons per day, providing a strong and consistent flow of purified water for drinking, cooking, coffee, ice, and other everyday kitchen needs.

Its high-output tankless design can fill a standard 8 oz glass in approximately 7 seconds, helping reduce the slow flow and waiting commonly associated with traditional storage-tank RO systems.

Up to 800 GPD filtration capacity

Fills an 8 oz glass in about 7 seconds

Strong, consistent on-demand water flow

Ideal for busy and high-demand households

REAL-TIME TDS SMART FAUCET

Smart Faucet with Real-Time Water Quality Monitoring

The Guardian RO800 makes it easy to monitor your reverse osmosis system and enjoy consistently clean, better-tasting drinking water. Its smart faucet features a real-time OUT TDS display, allowing you to check purified water quality directly at the tap. Color-coded indicators also provide a clear view of system performance, showing normal operation or alerting you when maintenance may be required.

Built-in filter life tracking removes the guesswork from routine servicing by showing remaining filter capacity and replacement timing. Combined with its quick-change filter design, the Guardian RO800 makes filter replacement faster, cleaner, and more convenient than many traditional reverse osmosis systems. With intelligent monitoring, simple maintenance, and reliable performance, it gives homeowners greater confidence in their drinking water every day.

Real-time OUT TDS display

Color-coded filter status indicator

Easy at-a-glance maintenance monitoring

Efficient filtration with less wastewater

ALL-IN-ONE TANKLESS DESIGN

All-in-One Tankless RO Design That Saves Space

The Guardian RO800 features an all-in-one tankless reverse osmosis design built to save valuable under-sink space while delivering high-performance drinking water filtration. Its compact structure helps create a cleaner, more organized installation without the bulky storage tank used in traditional RO systems.

By removing the need for a separate tank, the system also reduces extra tubing and connection points. This streamlined design helps simplify installation, improve convenience, and support a more efficient, modern under-sink water filtration setup.

Space-Saving Tankless Reverse Osmosis System

No Bulky Storage Tank for a Cleaner Under-Sink Setup

Fewer Connections for Easier Installation and Reduced Leak Risk

Streamlined Design for Reliable, On-Demand Purified Water

PROFESSIONAL INSTALLATION & EASY MAINTENANCE

Seamless RO Installation and Hassle-Free Filter Service

The Guardian RO800 is professionally installed for a clean, reliable under-sink setup. Quick-change filters and smart filter-life alerts simplify maintenance, while scheduled servicing helps maintain consistent water quality and performance. Choose a dedicated RO faucet or upgrade to a convenient three-way kitchen tap.

Each system comes with a dedicated RO drinking water faucet included, as well as an optional three-way kitchen tap that offers hot water, cold water, and purified water all from one faucet.

Faucet drilling service is available if no existing opening is present.

Customer consent required prior to drilling.

Professional under-sink RO installation

Quick-change filter design for faster service

Smart filter-life monitoring and alerts

Scheduled maintenance with no DIY filter changes

MULTI-USAGE & EXPANSION OPTIONS

Refrigerator, Ice Maker, and Mini Tank Expansion Support

The Guardian RO800 supports expanded usage with optional accessory connections for refrigerators and ice makers using the IMC-1 kit. It can also be paired with the MWT3 mini tank to support added flexibility for pressure-sensitive or multi-point drinking water setups.

Optional IMC-1 kit for refrigerator and ice maker connection

Compatible with MWT3 mini tank expansion

Supports more flexible drinking water applications

Ideal for enhanced household water convenience

SMART MONITORING

Real-time TDS display & filter life indicators

9-STAGE FILTRATION

Removes 1000+ contaminants

MINERAL BALANCED

Restores essential minerals & alkaline pH

TANKLESS DESIGN

70% more space savings vs tank systems

Guardian ZPS-RO800 Reverse Osmosis System Specifications

View the key features, dimensions, performance, and filtration specifications of the Guardian ZPS-RO800.

Model Guardian RO800	Use Case Residential under-sink drinking water system	Flow Rate Up to 0.56 GPM	Dimensions 5.3″ W × 14.7″ D × 15.5″ H
Daily Capacity Up to 800 GPD	Pure-to-Drain Ratio Approximately 2:1 Two parts purified water to one part drain water	Tankless Design ✓ Included	Installation Professional under-sink installation Countertop drilling may be required with approval
Electricity Required ✓ Yes Requires access to a standard electrical outlet	Remineralization ✓ Included Mineral-balanced alkaline post-filtration	Testing Standards NSF/ANSI 42, 53, 58 and 372 Testing or certification may apply to individual components supplied by their manufacturers	Purification Method Multi-stage reverse osmosis filtration 0.0001-micron RO membrane with alkaline remineralization
Operating Pressure 20–80 PSI	Smart Monitoring Real-time OUT TDS display Includes filter-life and system-status indicators	Filter Design Quick-change replacement filters Designed for faster and simpler routine servicing	Optional Connections Refrigerator and ice maker support Optional connection kit or mini tank may be required

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Maintenance & Filter Replacement

Routine maintenance is essential for optimal performance and water quality. We recommend:

Year 1 Maintenance: Standard filter replacement and system inspection
Year 2 Maintenance: Full service including filter replacement and RO membrane change

✔ Filters and membranes are included when professional maintenance is purchased.
✔ No DIY filter changes are required.

Warranty Information

When installed by Zenith Pure Solutions, Guardian RO includes a 5-Year Parts & Labor Warranty.

This warrant covers system components against defects in materials and workmanship and applies under normal residential use.

Important Warranty Note: To maintain warranty coverage and system performance, filters and membranes must be replaced at the recommended service intervals specified for the system.

Consumable items such as filters and membranes are not covered outside of scheduled maintenance.

NSF/ANSI Standards

The Guardian RO800 uses independently tested components that meet applicable NSF/ANSI standards:

NSF/ANSI 42 & 53

NSF/ANSI 58 & 61

NSF/ANSI 372

NSF/ANSI 42 & 53

NSF/ANSI 58 & 61

NSF/ANSI 372

Testing and certification apply to the specific components and performance claims listed by their respective manufacturers. This wording does not represent the Guardian RO800 as a complete NSF-certified system unless the full system model is separately listed by an accredited certification body.

Premium RO System Installed — $1,699 value

01 Premium RO System Installed — $1,699 value A high-performance reverse osmosis system installed to deliver cleaner, better-tasting drinking water at your tap.

Three-Way Tap Upgrade — $220 value

A convenient faucet upgrade that can provide hot, cold, and filtered water access from one tap when required.

Professional Water Test — $200 value

A clear in-home water test that helps identify your water quality concerns before recommending the right solution.

First-Year Filter Pack — $80 value

Replacement filters included for the first year to help keep your RO system performing properly.

Plumbing & Installation — Included

Professional setup and connection included for a clean, reliable installation.

2-Year Warranty — Included

Added protection and peace of mind with warranty coverage included.

Frequently Asked Questions

What is the Guardian RO800 reverse osmosis system?

The Guardian RO800 is a high-output, tankless reverse osmosis system installed beneath your kitchen sink. It provides purified water on demand for drinking, cooking, coffee, and ice without requiring a bulky storage tank. Its compact design, smart monitoring, and fast water flow make it suitable for busy households.

How does the Guardian RO800 purify drinking water?

The system uses multiple filtration stages, including sediment and carbon filtration followed by an ultra-fine reverse osmosis membrane. Water is forced through membrane pores as small as 0.0001 microns to help reduce dissolved solids and unwanted contaminants before the water reaches your faucet.

What contaminants can the RO800 help reduce?

The Guardian RO800 is designed to help reduce PFAS, lead, arsenic, fluoride, chlorine, chloramine, sediment, dissolved solids, VOCs, heavy metals, and substances that affect water taste and odor. Actual contaminant reduction depends on the incoming water quality, operating conditions, filter condition, and proper maintenance.

Does reverse osmosis remove beneficial minerals?

Reverse osmosis removes many dissolved substances, including naturally occurring minerals. The Guardian RO800 includes mineral-balanced filtration that restores beneficial minerals and supports a more alkaline pH, providing cleaner water with a fresh, balanced taste.

How fast does the Guardian RO800 produce purified water?

The Guardian RO800 offers filtration capacity of up to 800 gallons per day and a tested flow rate of up to 0.56 gallons per minute. Its high-output design can fill a standard 8-ounce glass in approximately seven seconds, reducing the slow flow associated with many traditional tank-based systems.

What does the 2:1 pure-to-drain ratio mean?

A 2:1 pure-to-drain ratio means the system produces approximately two cups of purified water for every one cup sent to the drain. This efficient design helps reduce wastewater compared with many conventional reverse osmosis systems while maintaining strong on-demand filtration performance.

How does the smart faucet monitor water quality?

The smart faucet displays real-time OUT TDS information, allowing you to monitor purified water quality directly at the tap. Color-coded indicators show the system and filter status at a glance, while built-in filter-life tracking helps identify when maintenance or filter replacement may be required.

How much space does the tankless RO system require?

The RO800’s all-in-one tankless design eliminates the need for a separate storage tank and can provide approximately 70% more under-sink space than traditional tank systems. Its approximate dimensions are 5.3 by 14.7 by 15.5 inches, although the available cabinet space and plumbing layout should be assessed before installation.

Can the RO800 connect to a refrigerator or ice maker?

Yes. The Guardian RO800 can support refrigerator and ice-maker connections with the optional IMC-1 accessory kit. It can also be paired with an MWT3 mini tank for pressure-sensitive appliances or setups requiring purified water at multiple points. Compatibility should be confirmed during your in-home assessment.

What installation, maintenance, and warranty support is available?

Zenith Pure Solutions provides professional under-sink installation, a dedicated drinking-water faucet, and optional upgrades such as a three-way kitchen tap. Recommended servicing includes filter replacement and system inspection during the first year, followed by a more comprehensive service that may include membrane replacement. Warranty coverage can vary by offer or package, so homeowners should confirm the current written terms before installation.

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In the interest of full transparency

Terms and conditions

*Terms and Conditions for this page and the website.

Disclaimer: The figures on this page, energy savings, appliance lifespan, and water hardness data come from published government and industry research. Every home is different, and individual results will vary. These are realistic outcomes, not guarantees.

The 30-day guarantee, warranty transfer, and free relocation offer each have their own eligibility conditions set out below. If you want real answers specific to your home, the free water test is the right place to start. It takes 5-10 minutes, costs nothing, and has no obligation. These terms and conditions may be updated or changed at any time at the discretion of Zenith Pure Solutions.

30-day guarantee

Applies where the system is not performing as expected or water quality results are unsatisfactory. The customer must contact Zenith within 30 calendar days of installation. The system must be unmodified and accessible for collection. Full removal and 100% refund processed within 14 business days of collection. Rental customers: subject to separate Rental Agreement terms. – This is a Limited Time offer

Warranty transfer

Warranty transfers automatically to new property owners at the original installation address. No re-registration required. New owner assumes the remaining warranty term from the original installation date. Does not apply to relocated systems.- This is a Limited Time offer

Free relocation

Applies to the first residential relocation within the greater Indianapolis service area only. Transportation of the unit is arranged by the customer. Subject to suitable plumbing at the new address and a minimum of 5 business days’ notice. Subsequent relocations quoted at standard labour rates. The 30-day guarantee does not reset on relocation. – This is a Limited Time offer

Pricing & financing

Daily rates shown are based on outright ownership via Hearth financing over 36 months at avg. 9.99% APR, subject to credit approval. Exact pricing confirmed at free water test. All prices include professional installation. No hidden fees.

Water hardness data sourced from Citizens Energy Group annual drinking water quality reports (citizensenergygroup.com). Hardness classification per Water Quality Association standard scale (wqa.org). Energy efficiency figures reference US Department of Energy — Energy Saver (energy.gov/energysaver/water-heating). Individual results vary. Statistical claims represent general industry data and do not constitute a guarantee of specific savings. · Full terms: zenithpuresolutions.com · Zenith Pure Solutions, Indianapolis, IN · Licensed & insured · EWQA certified · © 2026

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