Brio SIMPL 400 GPD 4-Stage Review: Specs, Pros and Cons

What stands out

• 400 GPD capacity with 1 LPM dispense flow
• 1:1 pure-to-drain water waste ratio
• Tankless design saves up to 70% of under-sink space
• NSF 372 certified for lead-free materials
• Four-stage filtration removing dirt, rust, chlorine, VOCs, and fine silts

Who it fits

Key specs explained for you

Capacity (GPD): 400

This rating means the system can produce up to 400 gallons of purified water daily. You get a fast flow rate of 1 liter per minute. This output suits busy households or small offices with high water demands. It ensures you rarely wait for fresh water during peak usage times like meal prep.

Pure to Drain Ratio: 1:1

For every cup of clean water you dispense, the system produces only one cup of wastewater. This ratio is highly efficient compared to older RO models that waste more water. You save on your water bill while still getting high-quality filtered water. It is a practical choice for eco-conscious buyers.

Filtration Stages: 4

The system uses four distinct filtration steps to remove contaminants. The first stage captures dirt, rust, chlorine, VOCs, and fine silts. This pre-filtration protects the main membrane and extends its life. You benefit from consistent water quality and fewer maintenance interruptions over the long term.

Features: Tankless

This unit lacks a storage tank, which saves significant under-sink space. It claims to save up to 70% of space compared to traditional tank systems. You avoid the risk of stale water sitting in a bladder. The compact footprint fits easily into smaller cabinets without cluttering your kitchen storage area.

Design and build details

The Brio SIMPL 400 GPD 4-Stage RO system is a tankless unit designed for under-sink installation. According to the listing, it features a compact, space-saving design that saves up to 70% of under-sink space compared to traditional tank systems. The integrated waterway system minimizes connections to reduce leak risks. The unit measures 14 inches in length, 5.2 inches in width, and 13.8 inches in height. It weighs 17.2 pounds. This small footprint allows you to fit the system into tighter cabinet spaces without sacrificing storage. The system conforms to NSF 372 standards for lead-free materials. This certification ensures the components meet safety requirements for contact with drinking water. You do not need to worry about lead leaching into your purified water supply. The brushed nickel faucet adds a clean, modern look to your kitchen sink. It complements most standard kitchen fixtures. Operation is straightforward with just three buttons on the unit. This simple interface means you can manage the system without complex programming. The color-coded tubes included in the installation kit help with easy setup. You can connect the feedwater adapter, drain saddle, and flow restrictor without confusion. The tankless design means you get fresh water on demand. There is no storage tank to clean or replace. This layout reduces the chance of stagnant water sitting in a tank. You get a continuous supply of purified water directly from the membrane. The sealed system protects the RO membrane for maximum efficiency. This structure supports long-term performance and consistent water quality. The brushed nickel finish resists fingerprints and smudges. It keeps the faucet looking clean with minimal maintenance. You can focus on your daily water needs without worrying about the unit's appearance.

Setup And Everyday Use Guide

Installation involves connecting the unit under your sink using the included kit. The package provides three color-coded tubes, a brushed nickel faucet, a feedwater adapter, a drain saddle, lock clips, and a flow restrictor. These components help you secure the system and connect it to your home plumbing. The design uses minimal connections to reduce potential leak risks. You do not need to install a storage tank, which saves space. The unit’s small footprint measures 14 inches in length, 5.2 inches in width, and 13.8 inches in height. It weighs 17.2 pounds. Daily operation is straightforward. The system features just three buttons for control. This simple interface lets you manage the filtration process without complex programming. You receive purified water at a flow rate of 1 liter per minute. The system maintains a 1:1 pure-to-waste ratio. For every cup of clean water you dispense, one cup of wastewater is produced. This efficiency supports steady use for families or small offices. The four-stage filtration removes dirt, rust, chlorine, VOCs, and fine silts. The PAC composite filter protects the RO membrane. You will need to replace the PAC filter every 12 months and the RO filter every 24 months. Search for specific Brio replacement cartridges to maintain performance. The sealed system conforms to NSF 372 standards, ensuring safe material contact. You get a reliable source of filtered water with easy maintenance.

Check Space And Upkeep Needs

Before you install the Brio SIMPL 400 GPD 4-Stage RO, verify your under-sink space. The unit measures 14 inches in length, 5.2 inches in width, and 13.8 inches in height. It weighs 17.2 pounds. Ensure your cabinet can accommodate these dimensions alongside other items. Check your faucet hole size for the included brushed nickel faucet. This system requires a standard drain connection for its wastewater line. You must also confirm your water pressure is suitable for reverse osmosis filtration. Upkeep involves replacing filters every 12 to 24 months. You will need specific Brio replacement cartridges for the PAC and RO stages. This model fits well if you prioritize space savings over tank storage. It suits buyers who want a compact, high-output solution. Compare it with the 600 GPD and 800 GPD variations if you need more capacity. These larger models share the same tankless design. This guide helps you choose the right size for your household needs.

Check before you buy

• Measure your under-sink cabinet for 14 x 5.2 x 13.8 inch fit
• Confirm faucet hole size matches the included brushed nickel faucet
• Ensure drain connection supports the 1:1 pure-to-waste ratio discharge
• Verify water pressure meets reverse osmosis system requirements
• Purchase Brio RPFTROM400PAC and RPFTROM400RO replacement filters in advance

The product at a glance

1

Brio SIMPL 400 GPD 4-Stage RO

Best for: Space-conscious homes needing high flow rates

Filtration Stages

4

Capacity (GPD)

400 GPD

Design

Tankless

Pure to Drain Ratio

1:1

Certification

NSF 372

Filtration Type

Reverse osmosis

View on Amazon: Brio SIMPL 400 GPD 4-Stage RO Affiliate link

The Brio SIMPL is a 4-stage, tankless reverse osmosis system designed for under-sink installation. It delivers 400 gallons per day with a 1:1 pure-to-waste ratio, meaning it produces one cup of wastewater for every cup of clean water. The compact unit measures 5.2 by 14 by 13.8 inches and weighs 17.2 pounds. It removes dirt, rust, chlorine, VOCs, and fine silts. This system suits households needing high flow rates without the bulk of a storage tank.

Pros

• Tankless design saves up to 70% of under-sink space compared to tank systems.
• 400 GPD capacity provides fast 1 LPM dispense flow for families or offices.
• 1:1 pure-to-waste ratio minimizes water waste during filtration.
• 4-stage filtration removes dirt, rust, chlorine, VOCs, and fine silts.

Cons

• No mention of smart features like app control or remote monitoring.
• Requires regular filter replacements every 12 to 24 months.
• Produces wastewater, though the 1:1 ratio is efficient for its class.

Good fit if

• You need high daily water output without using cabinet space for a tank.
• You want a straightforward 3-button operation for easy setup and use.
• You prioritize a compact footprint for tight under-sink installations.

Skip if

• You require smart connectivity or remote monitoring capabilities.
• You prefer a system with a built-in storage tank for backup supply.
• You need filtration for contaminants beyond dirt, rust, chlorine, VOCs, and silts.

Verdict: Brio SIMPL 400 GPD Tankless RO fits users who need high flow rates and space efficiency. It delivers clean water quickly without the bulk of a traditional tank system.

Specifications side by side

Frequently asked questions

See also

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• best reverse osmosis systems under 150
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