Best Under Sink RO Water Purifiers in India 2026

Water purifiers are essential in homes today due to contamination concerns, unlike two decades ago when they were a luxury. Various models are available, from basic, affordable options to more expensive ones with features like mineral addition and extra filtration for enhanced assurance.

Will an under sink water purifier function without power?

Yes! The pump will operate until the storage tank is empty. Each under-sink water purifier includes a small pressure tank, causing the pump to activate only when the pressure drops below a certain threshold and to stop once the maximum pressure limit is reached.

Purchase under-sink water purifiers with a high water storage capacity. For long-lasting filters, choose purifiers with large filter sizes. Avoid buying compact, sleek-looking water purifiers.

However, Under sink RO water purifier system and wall mounted and counter top ones all come with same filter types so same water purity, depending on the filter quality

What is Under Sink Water Purifier?

An under sink water purifier is a small and compact unit that can be installed under the sink. This device hides all plumbing line and works like a spy device in your modern kitchen.

Advantages of Under Sink Water Purifier

There are several advantages to purify your drinking water with a under sink water filter, here are some of them:

• Saves wall space and Counter-top space in kitchen

• High water flow rate

• No water spill

• Easy installation and maintain

• Low noise level during operation

• Ease to use right next to regular tap or under sink faucet

• Clean look & clutter free plumbing lines

• Purification similar to regular RO filters

• Pumps water even without electricity from storage tank

  
  

Disadvantages of Under Sink Water Purifier

These are some of the disadvantages of under sink water purifiers:

• Requires an electric socket under the sink

• Requires a plumbing inlet point under the sink

• Needs to be inspected for water leakage on every service intervals

  
  

1 - P-Link Under Sink Water Purifier

The P-Link Z+ is a high-performance 8-stage RO+UV+ZAC system designed for durability and value. It delivers safe, mineral-enriched water at a fast rate of 17 L/Hr with a generous 15L storage tank.

Why it stands out:

• Total Customization: The open-frame design allows you to add, remove, or replace any filter type available on the market, giving you full control over your water quality.

• Universal Compatibility: Not locked to proprietary brands; you can use any standard, affordable filters.

• DIY-Friendly: Engineered for easy, independent maintenance and quick filter swaps.

• Long-Lasting: Uses large-format filters that offer a significantly longer lifespan than "compact" premium models.

2 - AO Smith Under Sink Water Purifier

The Z2 Pro Vogue (Walnut) is AO Smith's top flagship model for under-sink water purifiers. It recovers 55% of wastewater and comes with a 1-year comprehensive warranty on filters. It features 7-stage purification, including a copper filter. The filters are costly to maintain, making this model ideal for those who can afford a premium price and desire hassle-free maintenance.

The AO Smith X5+ is the best under sink water purifier Budget friendly model in AO smith with 6 stage purification and easy to replace filters, third-party filters also compatible in this model.

3 - Kent Under Sink Water Purifier

KENT Excel Plus: High-Speed 8-Stage RO Purifier The Excel Plus combines space-saving design with heavy-duty performance. Designed to sit neatly under your counter, it delivers 17 litres of purified water every hour into its 7-litre storage tank. Comes with 4 Years (1 Year Standard + 3 Years Extended).

4 - Eureka Forbes Under Sink Water Purifier

Eureka Forbes offers a wide range of water purifiers under the Aquaguard brand, which is one of the most popular brands in the country.

The Aquaguard Designo ‎comes with a UTC RO+UV+MTDS system. Active Copper Technology, Equipped with an 8L large storage tank. The best part about this purifier is that it can be used for all kinds of water sources including municipal, bore well, rainwater harvesting and even lake/river water!

Which RO water purifier is best?

We can blindly recommend P-Link Z+ based on positive customer reviews and good after sale service throughout India.