Advanced Filtration. Natural Action Structured Flow. One Complete Drinking-Water Solution.

Filter First. Structure Last.

The Natural Action Under-Sink Structured Water System with Filtration combines the proven filtration performance of the Multipure Aquaversa with Natural Action's HD-9 vortex-inspired flow-form technology.

Water first passes through the Aquaversa's solid carbon-block filter to reduce specified drinking-water contaminants. It then flows through the Natural Action HD-9, which guides the filtered water through an engineered vortex-inspired pathway before reaching your dedicated drinking-water faucet.

This two-part system brings filtration and water structuring together in the correct order, without requiring electricity or reverse osmosis.

Better Water Starts with a More Complete Approach.

Why Choose This System?

• NSF-Certified Filtration — Multipure Aquaversa is certified to NSF/ANSI Standards 42, 53, and 401 for specified contaminant-reduction claims.

• Solid Carbon-Block Technology — Aquaversa uses a compressed carbon-block filter with submicron particle retention.

• Natural Action HD-9 Technology — Passive vortex-inspired flow-form engineering follows the filtration stage.

• Dedicated Drinking-Water Faucet — Convenient access to filtered water for drinking and cooking.

• No Electricity Required — Both components operate using household water pressure.

• No RO Storage Tank Required — Direct-flow carbon filtration without the separate storage tank used in conventional reverse osmosis systems.

• Replaceable CB6 Filter — Maintain the filtration component using the manufacturer's recommended service schedule.

• Under-Sink Installation — Designed for compatible kitchen plumbing.

• 10-Year Limited Warranty — Applies to the Natural Action structuring component, subject to terms.

• 90-Day Satisfaction Guarantee — Available on eligible Natural Action purchases.

Two Technologies. Two Different Purposes.

1. Filter It — Multipure Aquaversa

Address What's in Your Water.

The Multipure Aquaversa (MP750) uses solid carbon-block filtration to reduce contaminants for which the system has verified performance claims.

The Aquaversa is certified to:

• NSF/ANSI 42 — Specified aesthetic claims, including chlorine taste and odor reduction.

• NSF/ANSI 53 — Specified health-related contaminant-reduction claims, including lead and certain volatile organic compounds.

• NSF/ANSI 401 — Specified emerging-compound reduction claims.

These certifications apply to the Multipure Aquaversa filtration system with its designated CB6 cartridge—not to the Natural Action HD-9 structuring component.

The Aquaversa is not reverse osmosis and should not be assumed to reduce every dissolved substance or contaminant.

View Aquaversa Performance Information

2. Structure It — Natural Action HD-9

Improve How Your Water Moves.

After filtration, water passes through the Natural Action HD-9.

The HD-9 uses an engineered flow-form pathway designed to create vortex-inspired water movement.

This stage is passive and requires no electricity, chemicals, or replacement cartridges.

The HD-9 does not filter, disinfect, or remove contaminants. It is a separate water-flow technology added after the certified filtration stage.

Filter First. Structure Last.

How the System Works

Your Cold-Water Supply → Multipure Aquaversa Filtration → Natural Action HD-9 → Dedicated Drinking-Water Faucet

1. Water enters the Multipure Aquaversa from the compatible cold-water supply.

2. The CB6 carbon-block filter reduces specified contaminants according to its certified performance.

3. Filtered water flows through the Natural Action HD-9.

4. Water travels through the HD-9's vortex-inspired flow-form pathway.

5. The water reaches your dedicated drinking-water faucet.

The system is designed for everyday drinking water, coffee, tea, cooking, and food preparation.

Multipure Aquaversa Filtration Specifications

Feature	Specification
Filtration system	Multipure Aquaversa MP750
Filter technology	Solid carbon block
Replacement cartridge	CB6
Certified standards	NSF/ANSI 42, 53, and 401
Rated filter capacity	750 gallons
Rated flow rate	Approximately 0.75 gallons per minute
Aquaversa housing	Stainless steel
Housing dimensions	Approximately 8.5" H × 5.75" W
Housing inlet/outlet	1/8" NPT
Operating pressure	30–100 psi
Water temperature	32–100°F
Application	Cold drinking water only

These are the manufacturer's specifications for the Aquaversa filtration component. Actual installed-bundle dimensions and connection adapters may differ.

Natural Action HD-9 Specifications

Feature	Specification
Component	Natural Action HD-9
Bundle model	HD-9-USF
Technology	Passive vortex-inspired flow-form engineering
Position	After Aquaversa filtration, before drinking-water faucet
Electricity	Not required
Replacement cartridges	None for the HD-9
Contaminant removal	None attributable to the HD-9
Warranty	10-Year Limited Warranty, subject to terms

What's Included?

The complete bundle includes:

• Multipure Aquaversa under-sink filtration system

• Multipure CB6 carbon-block filter cartridge

• Natural Action HD-9 structuring component

• Dedicated drinking-water faucet

• Installation fittings and tubing supplied with the bundle

The system uses compatible under-sink tubing and adapters. The Aquaversa housing itself has 1/8-inch NPT inlet and outlet ports; do not confuse those housing connections with the tubing or quick-connect fittings used in the installed assembly.

Installation

The system is designed for installation beneath a kitchen sink with a compatible cold-water supply.

The correct installation sequence is:

Cold Water → Aquaversa → HD-9 → Drinking-Water Faucet

The dedicated faucet may be installed through an existing suitable sink opening or a new opening where permitted.

Confirm available cabinet space, faucet compatibility, water pressure, and connection requirements before installation.

Professional installation is recommended when plumbing modifications are required.

Filter Replacement and Maintenance

Multipure Aquaversa CB6 Filter

Replace the CB6 cartridge at 750 gallons or annually, whichever comes first, or sooner if reduced flow, taste, odor, or other conditions indicate replacement is necessary.

Actual cartridge life depends on water usage and source-water conditions.

Shop Multipure Aquaversa CB6 Replacement Filter

Natural Action HD-9

The HD-9 does not contain a replaceable filter cartridge.

Periodically inspect the installation for leaks and follow the supplied operating instructions.

Warranty and Satisfaction Guarantee

Natural Action HD-9: 10-Year Limited Warranty for qualifying manufacturing defects, subject to Natural Action's warranty terms.

Multipure Aquaversa: Covered by the applicable Multipure manufacturer's warranty. Its warranty terms are separate from the Natural Action HD-9 warranty.

90-Day Satisfaction Guarantee: Available on eligible Natural Action purchases, subject to the applicable return terms.

Which Natural Action System Is Right for You?

Already Have Filtration?

Explore the Under-Sink Structured Water System.

Already Have Reverse Osmosis?

Explore the Post-RO Structured Water System.

Want Reverse Osmosis, Remineralization, and Structured Flow?

Explore the Reverse Osmosis 10-Stage System.

Frequently Asked Questions

1. What is the Under-Sink Structured Water System with Filtration?

It is a two-part drinking-water system combining Multipure Aquaversa carbon-block filtration with Natural Action's HD-9 passive vortex-inspired water-structuring component. Water is filtered first and then passes through the HD-9 before reaching a dedicated faucet.

2. What contaminants does the Multipure Aquaversa reduce?

The Aquaversa is NSF-certified under Standards 42, 53, and 401 for specified reduction claims, including chlorine taste and odor, lead, certain volatile organic compounds, and selected emerging compounds. Refer to the manufacturer's performance data for the complete list and certified conditions.

3. Does the Natural Action HD-9 remove contaminants?

No. The HD-9 does not filter, disinfect, or remove contaminants. Contaminant reduction is performed by the Multipure Aquaversa filtration component.

4. What does “Filter First. Structure Last.” mean?

Water passes through the Multipure Aquaversa carbon-block filter first, then through the Natural Action HD-9 vortex-inspired flow-form pathway before reaching the drinking-water faucet.

5. Does this system use reverse osmosis?

No. This bundle uses Multipure Aquaversa carbon-block filtration, not a reverse osmosis membrane. It does not require a conventional RO storage tank.

6. How often should I replace the Aquaversa filter?

Replace the CB6 filter at 750 gallons or annually, whichever comes first, or sooner if performance indicates replacement is needed. Follow Multipure's maintenance instructions.

7. Does the system require electricity?

No. The Aquaversa filtration component and Natural Action HD-9 operate using household water pressure without electricity.

8. Does the bundle include a drinking-water faucet?

Yes. The bundle includes a dedicated drinking-water faucet and installation fittings for a compatible under-sink installation.

9. Can I install the system myself?

Installation is possible for someone familiar with under-sink plumbing. Confirm cold-water connections, available space, faucet mounting, water pressure, and supplied fittings. Professional installation is recommended when modifications are needed.

10. What warranty and guarantee are included?

The Natural Action HD-9 component has a 10-Year Limited Warranty for qualifying manufacturing defects. The Multipure Aquaversa has separate manufacturer warranty terms. Eligible Natural Action purchases are covered by the 90-Day Satisfaction Guarantee, subject to terms.

Better Water Begins with the Right Sequence.

Certified Filtration. Nature-Inspired Flow. Everyday Convenience.

Bring Multipure Aquaversa filtration and Natural Action HD-9 water-structuring technology together in one under-sink drinking-water solution.

Filter First. Structure Last.

Natural Action — It's Water, The Way Nature Intended.