AO Smith Z2 Plus 5 L RO Water Purifier Review

The AO Smith Z2 Plus is an under-sink water purifier that remains hidden under the kitchen counter. It purifies water at the rate of 15-liters per hour through an advanced six-stage side stream RO purification system. The purified water is stored in the virgin food-grade ABS storage tank having a capacity of 5-liters.

The water purifier is convenient to use because of its digital display. It also includes advanced filter change indicators that ensure the safety and purity of water at all times. The mineralizer technology powers the purification system to enhance the taste and nutritional value of the drinking water.

Let us now take a look at the detailed review of the AO Smith Z2 Plus.


6-Stage RO Purification Technology

It purifies water through a six-stage purification system, which includes a sediment filter, pre-carbon filter, side stream RO membrane, silver activated post carbon filter, and a mineralizer. The RO membrane ensures 100% pure water with minimum water wastage and improved water recovery. It is suitable for areas with low and high TDS levels.

Under-Sink Water Purifier

The AO Smith Z2 Plus is an under-sink water purifier. It can be conveniently installed under the kitchen counter so that it remains hidden from the view of people. It provides an international look to your kitchen.

5-Liter Storage Capacity

It comes with a food-grade safe storage tank that can store up to 5-liters of purified water. The storage tank keeps the water safe and protected against impurities. It ensures immediate access to drinking water for your family.

Mineralizer Technology

The Min-Tech maintains the pH levels and retains the essential minerals of the water. Hence, it enhances the taste of pure and healthy drinking water. The nutrients and minerals provide various health benefits to you and your family.

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What Do We like

Digital Display

The intelligent digital display provides useful information for the convenient operation of the water purifier. It comes with advance filter change alerts that indicate when the sediment filter, carbon filters, and the RO membrane requires changing.


The water purifier includes a goose-neck faucet which ensures the smooth flow of the purified water. It offers convenience to users by preventing water spillage. Hence, it keeps your kitchen mess-free.

Long RO Membrane

The pre-filters remove suspended impurities from the water to enhance the life of the RO membrane. Moreover, the RO membrane meets the safety standards and material requirements of the WQA. Hence, it ensures safe drinking water at all times.

What We Don’t Like

Water Leakage

Water started leaking from the purifier after a few days of use. It led to a lot of water wastage. Hence, it is advised to check for leakage issues before making a purchase.


The unique features and long-lasting RO membrane makes this water purifier a suitable choice in areas with high and low TDS. It is the ideal choice for those looking for an under-sink water purifier. It enhances the taste and mineral content of the water while reducing water wastage. Hence, the AO Smith Z2 Plus is our top recommendation.

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Anaida Sutherland

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