5 best under sink water purifiers in India: These models give your kitchen a clean, clutter free look

Recently, one of my colleagues bought an under-sink water purifier for his new kitchen. He was getting the cabinets done at the same time, so he had the option to keep the purifier tucked away below the sink instead of giving it a spot on the counter. The result was a much cleaner-looking kitchen, with just the separate drinking-water faucet visible above the counter.

Under-sink purifiers are becoming a practical option for anyone who wants an RO system without another appliance occupying kitchen space. But before buying one, there are a few things worth checking, including the water quality at home, storage capacity, purifier dimensions and the space available inside the cabinet. If you’re considering one for your kitchen, these are five models worth looking at in India.

KENT Sterling Plus

KENT Sterling+ makes a strong case for itself if you want an under-sink purifier that covers most of the bases without making the installation overly complicated. It combines RO, UV and UF purification with TDS control, so it can deal with dissolved impurities as well as microbial contamination. The 6-litre tank should also be adequate for everyday drinking and cooking requirements in a small or medium-sized household.

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The TDS-control feature is particularly useful after RO purification, since the process removes dissolved solids along with other impurities. KENT also rates the purifier for brackish, tap and municipal water, giving it a fairly broad range of use cases. Its 20 litres per hour purification rate means you don’t have to wait particularly long when the storage tank needs to be replenished.

Boon Tap

Boon Tap is one of the more interesting options if the whole point of going for an under-sink purifier is to keep the kitchen looking clean. The purifier and its 8-litre storage tank sit below the counter, while the only visible part is a stainless-steel tap. Boon also gives you three tap finishes, so the faucet can blend into the kitchen instead of looking like an add-on.

The more useful feature, especially for an under-sink installation, is WaterAI. Since the purifier is hidden inside the cabinet, checking its status isn’t as convenient as it is with a wall-mounted model. The app lets you monitor TDS, flow and water quality, while also providing filter-health predictions and alerts. The purifier can handle input TDS of up to 2,000 ppm and purifies at 20 litres per hour, making it suitable for homes dealing with borewell, tanker or mixed water.

AO Smith Z2+

The Z2+ is aimed at people who want the purifier to disappear into the kitchen rather than become another appliance sitting on the wall or counter. Its under-counter design keeps the main unit below the sink, while the drinking-water faucet sits above the counter. AO Smith uses a six-stage purification process here, including RO and its Min-Tech mineraliser.

The 5-litre storage capacity is on the smaller side compared with some options in this list, but the Z2+ is more about its overall under-counter package. It is designed to handle borewell, tanker and mixed water, making it a sensible option for homes where the incoming water has a higher TDS. The digital display also gives you a quick way to check the purifier’s status without having to pull the unit out of the cabinet.

Aquaguard Aspire Designo UTC

Aquaguard’s Aspire Designo UTC range stands out because you aren’t locked into one type of purification. The range includes UV + UF and RO + UV configurations, allowing you to choose according to the quality of water supplied to your home. The RO version also adds active copper, while the 2X technology is designed around longer filter life.

For households receiving relatively low-TDS municipal water, the UV + UF variant can be a more appropriate choice than using RO unnecessarily. Homes dealing with borewell or tanker water can instead opt for the RO version. This flexibility makes the Aspire Designo particularly interesting if you’re still figuring out which purification technology makes sense for your water supply.

Faber FWP UTS Elite

The FWP UTS Elite takes a fairly straightforward approach: give users plenty of purified water without requiring the storage tank to be refilled constantly. Its 12-litre tank is the largest among the models in this list, which should appeal to larger families or households that use purified water for both drinking and cooking.

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Faber uses a seven-stage system combining RO, UV and alkaline purification, with the purifier rated for input water with TDS levels of up to 2,500 ppm. It also claims 40% water recovery, which is worth considering because RO purifiers can otherwise send a considerable amount of water to the drain. The larger tank does mean you’ll need to pay closer attention to the cabinet dimensions before installation.

Prices of the best under sink water purifiers in India

Water Purifier	Price
KENT Sterling Plus	Rs 20,949
Boon Tap	Rs 20,990
AO Smith Z2+	Rs 20,599
Aquaguard Aspire Designo UTC	Rs 22,499
Faber FWP UTS Elite	Rs 18,999

Note: Prices are subject to change and may vary depending on offers and retailers.

What to check before buying an under-sink water purifier

An under-sink purifier needs a little more planning than a regular wall-mounted model. The first thing I’d check is the water’s TDS level. RO makes sense for high-TDS water, while households receiving relatively low-TDS municipal water may have better reasons to consider UV + UF instead.

• Water quality: Check your incoming TDS before deciding whether you actually need RO.
• Cabinet space: Measure the width, height and depth available below the sink.
• Storage: 5–6L works for smaller households, while 8–12L is more useful for families.
• Purification: RO is useful for dissolved solids; UV and UF address different contamination concerns.
• Water recovery: A higher recovery rate means less water is wasted during RO purification.
• Filter life: Longer filter intervals can reduce maintenance hassle and recurring costs.
• Installation: Check whether the purifier requires a dedicated inlet, drain connection and power socket.
• Service: Make sure the brand has service coverage in your area before committing to an under-sink installation.

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