The H2O USRO4-JG 4-Stage Reverse Osmosis System Offers More Uses Than Bottled Water

The H2O USRO4-JG reverse osmosis system is an under-sink system designed for potable water sources and works best when your feed water falls within these guidelines:

• Water pressure: 45 to 100 psi
• Water temperature: 40°F to 85°F
• pH range: 4 to 11
• Total dissolved solids (TDS): 2000 ppm or less
• Iron: 0.1 ppm or less
• Manganese: 0.05 ppm or less
• Hydrogen sulfide: must not be present

If you are outside these ranges, performance can drop, and filter life can shorten.

This system delivers purified drinking and cooking water from a dedicated reverse osmosis (RO) faucet (sold separately). It includes a storage tank and installation accessories and is pressure-tested before shipping. Choose your production rate (50 or 100 gallons per day) and your post-filter option (GAC or calcite remineralization) based on your taste preferences and household routine.

This system is commonly chosen by homeowners who want better-tasting water for drinking, coffee, tea, cooking, and ice, without relying on bottled water.

• Designed for higher flow delivery after the tank using 3/8 inch John Guest tubing and fittings from the tank to the faucet line.
• Storage tank system means you have water ready when you open the RO faucet.
• Automatic shut-off reduces unnecessary waste by stopping feed water when the tank is full.

What Does 4-stage Reverse Osmosis Mean?

A 4-stage RO system uses four filtration steps to reduce particles, remove chlorine and improve taste and odor, purify with a thin-film composite membrane, and polish the water right before the faucet.

Stage 1: 5 Micron Sediment Prefilter
Helps reduce dirt, rust, and sediment.

Stage 2: 10 Micron Carbon Block Prefilter
Helps reduce chlorine and improves taste and odor, while protecting the RO membrane.

Stage 3: Reverse Osmosis Membrane
Membrane filtration down to 0.0001 microns. Designed to reduce dissolved solids at the ionic level. Typical removal is 93% to 97% of dissolved mineral salts and other contaminants in the feed water.

Stage 4: Post Filter (Your Choice)
Option A: inline GAC post filter for final taste polishing
Option B: inline calcite remineralization post filter to help raise pH and add back a small amount of minerals for a less “flat” taste

Choose Your Configuration: 50 vs 100 Gallons Per Day Output

Choose 50 GPD if:

• You want reliable everyday RO water for a typical household routine
• Your usage is moderate, and you are comfortable with a steadier refill rate

Choose 100 GPD if:

• You want faster tank refill and more available RO water during heavy use
• You regularly use RO water for cooking, beverages, and ice, or you have a higher daily demand

Post filter choice

Choose GAC if:

• You want classic RO taste with a final carbon polish
• You prefer a clean, neutral finish

Choose calcite remineralization if:

• You prefer RO water that tastes less acidic or less “thin”
• You want a more mineral-like taste profile for drinking

What is Included in the H2O USRO4-JG 4-Stage Reverse Osmosis System?

• 4-stage RO manifold with Pentair housings
• 5 micron spun sediment prefilter
• 10 micron carbon block prefilter
• Thin film composite RO membrane (choose 50 or 100 GPD)
• Post filter (choose GAC or calcite remineralization)
• NSF certified quick-connect fittings
• NSF certified metal bladder tank, 3.2 gallons
• John Guest tubing, valves, and accessories
• Automatic shut-off valve to stop the feed line when the tank is full
• Tank ball valve
• Housing wrench and installation parts

Note: RO faucet is sold separately.

Installation

This is a high-level overview. Follow the included instructions for your exact configuration.

1. Shut off the cold water supply under the sink and relieve pressure.
2. Mount the RO assembly where you have service access.
3. Install the feed water adapter on the cold water line.
4. Install the drain connection on the sink drain line.
5. Place the storage tank where it will sit level and remain accessible.
6. Connect tubing from the feed to the filters, membrane, tank, drain, and faucet line.
7. Turn the water on slowly and check for leaks.
8. Flush and start up the system as directed, then discard initial water until the system is thoroughly rinsed.
9. Recheck all connections later the same day.

Replacement Filter Schedule for the H2O USRO4-JG 4-Stage RO System

Replacement timing depends on water quality and usage. Replace sooner if the flow drops or the taste changes.

Warranty information

• RO filter housing assembly: 3 years
• Metal bladder tank: 1 year
• Thin film composite membrane: 1 year

Specifications

• System type: under-sink reverse osmosis, 4-stage
• Output options: 50 or 100 gallons per day
• Tank size: 3.2-gallon bladder tank
• Max feed TDS: 2000 ppm or less
• Water temperature: 40°F to 85°F
• Water pressure: 45 to 100 psi
• Allowable pH: 4 to 11
• Max iron: 0.1 ppm
• Max manganese: 0.05 ppm
• Hydrogen sulfide: must not be present
• Water source: must be potable
• Country of origin: assembled in the USA
• Unit weight: 23 lbs

FAQs on a 4-Stage Reverse Osmosis System

Q: What is the main difference between a 4-stage and a 5-stage RO system?
A: A 4-stage system uses sediment, carbon, a membrane, and a post filter. A 5-stage system typically adds a carbon stage or a specialty stage, depending on the configuration.

Q: Does this 4-stage RO system include a faucet?
A: No. The RO faucet is sold separately.

Q: How do I choose between 50 GPD and 100 GPD?
A: Choose 50 GPD for typical household use. Choose 100 GPD if you want faster tank refill and higher daily demand support.

Q: What does the post filter option change?
A: GAC focuses on final taste polishing. Calcite remineralization helps raise pH and can improve taste for people who prefer a less “flat” RO flavor.

Q: Will a 4-stage RO system work if my water pressure is low?
A: RO works best within the recommended pressure range. If pressure is below the recommended range, production can slow, and you may need a booster pump.

Q: Will a 4-stage RO system reduce chlorine taste and odor?
A: Yes. The carbon stage is designed to reduce chlorine taste and odor, and the post-filter further polishes the taste.

Q: How do I know when to change filters?
A: Replace on a schedule and sooner if you notice slower flow at the RO faucet, taste changes, or reduced production.

Q: Can I install a 4-stage RO system myself?
A: Many homeowners can if they are comfortable with under-sink plumbing and following a step-by-step install. A plumber is a good option if you want the fastest, lowest-risk installation.

Choose your GPD and post-filter option, then upgrade your kitchen with a proven 4-stage RO system that keeps great-tasting water ready for drinking, cooking, and ice.

View a picture of components included in this RO System.

Warranty Information:

• RO Filter Housing Assembly – 3 Years
• NSF Metal Bladder Tank – 1 Year
• Thin Film Composite Membrane – 1 Year

View a chart of particle size removal range by filtration for thin-film composite membranes.

View our installation and service manual included with this system.

Do you need a
larger bladder tank?

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4-Stage Reverse Osmosis Filter Replacement Kit Includes:

• (1) 5 Micron Melt Blown Sediment Cartridge
• (1) CBC-05(10) CA Ware 5 Micron Carbon Block
• (1) T-33-RO Inline Carbon Post-Filter
• (1) Filmtec reverse osmosis membrane based on your gallon per day needs
• (1) Reverse Osmosis Replacement Instructions and Sanitizing Guide

4-Stage Reverse Osmosis System

💦How Do You Install a Reverse Osmosis Water Filter?

The most crucial step is to start right: Always wash your hands or use gloves when handling water filters and replacement cartridges.

Any residential and commercial system’s filters should be replaced each year (annually). The RO membrane can usually be replaced every other year, but the pre-filters and post-filters should be changed annually and, in some cases, more often.

💧How to Install a Replacement Reverse Osmosis Water Filter

1. Turn off the valve on the RO bladder tank.
2. Turn off the feed water pressure.
3. Open the RO faucet to relieve pressure.
4. Using the supplied housing wrench, remove the filter housing.
5. Discard old filters.
6. Clean filter housings with a cleaning brush.
7. Install new filters in the system.
8. Remove and replace the GAC Post filter.
9. Remove the fittings from the old post filter.
10. Reapply Teflon tape
11. Install the fittings in the new post filter.
12. Turn on feed pressure.
13. Open tank valve.
14. Allow the tank’s water to flush out the post filter and run it to drain until it is empty.
15. Run two more complete batches to drain before using water.

For a more detailed explanation of installing a reverse osmosis filtration system, check out our RO installation guide here: https://everpurefilter.com/manuals/reverse-osmosis-installation/.

🔄Shop reverse osmosis water filter kits now.

https://everpurefilter.com/product-category/kits/reverse-osmosis-cartridge-kits/

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More Uses Than Bottled Water

The innovative Aqua Flo twist and lock design makes service simple for this 50 GPD reverse osmosis home system. Twist off the old cartridge and twist on the new. No messy sump removal. This Aqua Flo system makes drinking water better and life easier.

Hydrotech’s latest RO features quick-change cartridges, which can be customized for changing water conditions. These proprietary cartridges also simplify the regular replacement as required – typically on an annual basis. The QCRO delivers bottle water quality without the hassle or cost.

50 GPD Reverse Osmosis Home System, Aqua Flo Quick-Change, Hydrotech QCRO4V-50 Features:

• High Quality Reverse Osmosis Membrane
• 50 Gallons Output Per Day
• Sediment Pre-Filtration
• Carbon Block Pre-Filtration
• Granular Carbon Post-Filtration
• Quick-Change Cartridges – Easy as a Light Bulb
• 1/4″ Quick-Connect Fittings
• Color Coded Fittings & Tubing for Ease of Installation

System Includes:

• Stage 1: 41407001 Sediment Filter (5 Micron)
• Stage 2: 41407002 Carbon Block Cartridge (5 Micron)
• Stage 3: 41407003 Thin Film Composite Membrane (50 GPD)
• Stage 4: 41407004 Granular Activate Carbon Cartridge or 41407002 Carbon Block Cartridge (5 Micron)
• Long Reach Chrome Faucet
• Storage Tank
• Installation Hardware

QCRO4V-50 Certified Contaminant Reduction

This system has been tested according to WQA S-300 for reduction of the substances listed above. The concentration of the indicated substances in water entering the system was reduced to a concentration less than or equal to the permissible limit for water leaving the system, as specified in NSF/ANSI 58 standard.

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More Uses Than Bottled Water

4 Stage Reverse Osmosis System by Hydrotech

All Hydrotech reverse osmosis systems include 3/8″ outlet tubing to the faucet for higher flows, quick-connect fittings, and color-coded tubing for easy installation and servicing. All systems are backed by a two-year limited warranty.

The 4VTFC25G Hydrotech reverse osmosis drinking water system combines mechanical filtration with reverse osmosis technology for effective water treatment in point-of-use applications. In addition, this model includes standard features such as a Thin Film Composite membrane, sediment filter, pre-activated carbon filter, post carbon filter, automatic shutoff, chrome air gap faucet, and a metal storage tank.

View a chart of particle size removal range by filtration for thin-film composite membranes.

How Does a 4 Stage Reverse Osmosis System Work?

The process involves applying pressure to water, forcing it through the membrane, and leaving impurities behind. This advanced filtration method can remove even the smallest particles, resulting in drastically clearer water safe for consumption.

When selecting a water purification system for your home, reverse osmosis stands out. Unlike other methods such as carbon filters or distillation, reverse osmosis provides a thorough and reliable purification process. It removes up to 99% of contaminants, ensuring you and your family have access to the highest quality drinking water.

The products we sell are designed for exceptional performance and durability. With our wide range of options, you can find the perfect system to meet your specific needs and budget.

Choose this 4 stage reverse osmosis system and experience the benefits of clean, pure, and great-tasting water. Contact us today to learn more about our high-quality products and start enjoying their many advantages.

Features of Our Reverse Osmosis Filtration Systems

Packed with innovative features, our systems provide high-quality filtration, space-saving design, and easy installation and maintenance.

Advanced Filtration

Utilizing the latest reverse osmosis technology, our reverse osmosis systems effectively remove impurities, contaminants, and harmful substances such as chlorine, lead, bacteria, and other pollutants.

Space-saving Design

Our compact systems are engineered to fit seamlessly into any kitchen or utility room, without occupying valuable countertop or floor space. With our sleek, streamlined design, you don’t have to compromise on functionality or aesthetics.

DIY Installation and Easy Maintenance

Our user-friendly installation instructions and pre-assembled components make the setup process straightforward. With just a few simple steps, you can have your system up and running in no time. Additionally, our systems are designed for easy maintenance, featuring quick-change filters and accessible components. Keeping your system in optimal condition has never been easier.

When choosing a reverse osmosis home system, our products offer unmatched features that ensure the best quality water for your home. With our high-quality filtration, space-saving design, and easy installation and maintenance, you can trust that our systems will provide you with the purest and freshest water possible.

Get started today with this Hydrotech 4 stage reverse osmosis system.

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