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Modern kitchens demand more than just functionality—they demand elegance, efficiency, and intelligent design. That's where an under sink RO system comes into play. Unlike traditional wall-mounted purifiers, under sink systems save space, maintain kitchen aesthetics, and deliver high-quality purified water.

Whether you're setting up a modular kitchen, looking for a space-saving RO solution for your home or office, or just upgrading your old purifier, this guide will help you choose the best system suited to your needs.

What Is an Under Sink RO System?

An under sink RO system (also called under counter RO system) is a water purifier designed to be installed beneath the kitchen sink. It typically comes with a separate faucet mounted on the sink or counter, delivering purified water without disrupting your kitchen's look.

Unlike bulky wall-mounted units, these systems are concealed within the kitchen cabinet, offering a compact RO purifier experience while maintaining purification standards like RO+UV+UF and TDS control.

Why Choose an Under Sink RO System?

 1. Space Efficiency

Under sink RO units are ideal for small kitchens or modular layouts. You can utilize the area beneath the sink, leaving your countertop clean and clutter-free.

 2. Aesthetics for Modular Kitchens

If you're designing a modular kitchen, having a purifier installed inside the cabinet maintains the sleek and seamless design that interior designers and homeowners love.

 3. Quiet & Hidden Operation

The system runs quietly inside the cabinet and doesn't interrupt your workflow or kitchen decor.

 4. High Purification Performance

Despite being compact, these systems typically come with advanced features like RO, UV, UF, mineral cartridges, and TDS controllers—delivering the same or better performance as traditional models.

Top Under Sink RO Systems in India (2025)

Let’s explore some of the best models available on RomegaMart, handpicked for performance, design, and value for money.

 1. Aqua Aaj Black Color UTC Water Purifier

Filtration: RO+UV+UF+Mineral Cartridge+TDS Controller
Color: Black
Type: Under The Counter (UTC)

Why it stands out:
This purifier offers a complete 5-stage purification system designed for Indian water conditions. It’s ideal for homes with mixed water sources and fits perfectly under the sink. The black design adds a premium look when the faucet is visible on the counter.

Use case: Large families or homes with high water usage.

 2. Purella ORTHO Water Under The Counter Purifier

Storage: 10 Liters
Color: White
Type: Under The Counter

Why it stands out:
Designed with convenience and hygiene in mind, this purifier comes with a spacious 10-liter storage tank and a reliable multi-stage filtration process. It integrates smoothly into modular kitchen setups.

Use case: Ideal for urban apartments and homes with medium to high water needs.

3. Aqua Star UTC RO Water Purifier

Storage: 6 Liters
Color: White with Black
Type: Under Sink / Domestic Use

Why it stands out:
The compact 6-liter capacity makes it one of the best compact RO purifier options. Easy to install and maintain, this system suits households with limited space.

Use case: Small families or bachelors.

4. Nova Star UTC Under Sink RO System

Color: White
Type: Under Sink / Domestic

Why it stands out:
With its powerful purification setup and discreet design, Nova Star is a great fit for anyone setting up a RO system for modular kitchen interiors. It’s also easy to service and comes with robust fittings.

Use case: Compact homes and interior-focused kitchens.

Looking for more water purification solutions? Explore our Domestic Systems category for a wide range of RO systems tailored to your needs.

Under Sink RO System vs Wall-Mounted RO: Key Differences

Tips for Installing and Maintaining an Under Sink RO System

Here are a few pointers to help you get the most from your purifier:

• Measure cabinet space: Ensure your kitchen cabinet has enough room for the purifier and tank.

• Separate faucet installation: Install the tap on the counter or near your sink for easy access to clean water.

• Check water pressure: Under sink systems need consistent water pressure. Use a booster pump if required.

• Replace filters regularly: Just like any purifier, change the RO, UV, and UF filters as per the manufacturer’s schedule to ensure optimal performance.

• Look for service accessibility: Choose models that offer easy maintenance access or are supported locally.

Need spare filters or parts? Explore Domestic RO Spare Parts at RomegaMart for cartridges, taps, and membranes.

FAQs About Under Sink RO Systems

Q1: Is an under sink RO system better than a wall-mounted purifier?
A: If you're looking for a compact, hidden, and aesthetic solution—yes. Under sink systems perform equally well and save counter space.

Q2: Can I install it myself?
A: While basic installation is possible for professionals, it’s best to let a trained technician handle under sink setups due to plumbing requirements.

Q3: Is maintenance more difficult for under sink purifiers?
A: Not at all. In fact, many models are designed for easy access and simple filter changes. RomegaMart also offers spare parts for regular maintenance.

Conclusion: Why an Under Sink RO System Is Worth It

The under sink RO system is more than just a space-saving solution—it's a long-term investment for homeowners and professionals who want powerful filtration without compromising on kitchen design. These systems are ideal for modern urban spaces and especially suitable as a RO system for modular kitchen environments.

If you're considering upgrading your water purifier or fitting out a newly built kitchen, now is the time to explore these intelligent options.

Still comparing? Don’t miss our expert picks in the Top 5 Best Water Purifiers Under ₹10,000 blog to make an informed and affordable choice.

 Ready to Shop?

Browse the complete range of Under Sink RO Systems on RomegaMart and find the perfect match for your needs.