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What’s the difference between an Electric and a Non-Electric water purifier?

By Pureit Water | June 18, 2021
Water Purifiers,

Water purifiers without a doubt have become a fundamental part of our daily lives for clean and healthy drinking water. There are mainly two types of water purifiers in the market. Namely, electric water purifiers and non-electric water purifiers. These two types, as the names suggest, vary in their usage of electricity. But at the same time, also differ on several other factors like – water purification process, kinds of impurities removed, features and aesthetics, maintenance cost and so forth.

Electric Water Purifiers vs Non-Electric Water Purifiers

Electric water purifiers mainly comprise of Reverse osmosis (RO), Ultraviolet (UV) and a combination of both - RO + UV water purifiers. These are more sophisticated in their technology and use various types of water filters to provide pure and clean drinking water. They have better water purification efficiency and come with several other attractive features.

Non-electric water purifiers are gravity-based and do not require electricity to function and purify water. They use filters like - Sediment filter, carbon filter, and microfilters, which are arranged one after the other vertically to remove different kinds of impurities and purify water. They use the natural water pressure to create a pull as water flows through these filters.

Let’s understand the key differences between the two.

Stages of Water Purification

  • Electric: Advanced 6 or 7 stages of purification

An RO water purifier with its advanced stages of purification, provides clean drinking water to you and your family. These purifiers can remove high TDS, chemicals, and heavy metals which cannot be removed using a UV or a non-electric water purifier. A typical RO water purifier includes - Sediment Filter, RO Membrane, Pre-RO Carbon filter, UV Chamber, Mesh Filter, Post RO Carbon Filter, and Micro Filter. A UV purifier on the other hand comes with around 4 stages of water purification, designed to use electricity to kill microorganisms like protozoa, viruses, and bacteria.

  • Non-Electric:3-4 stages of purification

These come with a much simpler purification process. Water is poured in the device from the top and with the gravitational pull it passes through sediment, carbon and micro filters arranged one below the other.

Purification of Different Sources of Water

  • Electric: Suitable for all sources of water

In India, one of the most common sources of water is borewell or ground water. The TDS levels of borewell water are usually higher as compared to other sources like tank or municipal. In cases where TDS levels are more than 300 ppm, RO water purifiers are the best solution as only RO technology can get rid of high levels of TDS.

  • Non-Electric:Suitable for only Municipal water

Non-electric water purifiers should be preferred when the TDS levels are under consumable limits and thus water is comparatively less harmful for consumption. Non-electric water purification systems can remove microbes like bacteria and pesticides along with bad odor but are incapable of removing heavy metals that are harmful if consumed in the long run.

Taste of water

  • Electric:Enhances taste to make it sweeter

Water collected directly from lakes or rivers is salty mainly because of the presence of minerals, salts and other organic compounds. RO water purification technology is best at treating water with hardness and turning it into soft, sweet tasting consumable water.

  • Non-Electric: Doesn’t improve the taste of water

The activated carbon filter present in non-electric water purifiers, remove contaminants and chlorine that can impact and sometime change the taste and color of water but doesn’t sweeten it.

Filter replacement

  • Electric:  Needs replacement once in a year

Filter replacement in electric water purifiers should be occasional. RO and UV purifiers are built to require minimum maintenance.

  • Non-Electric:Needs replacement every 2-3 months

Non-electric filters need replacement every 3 months as they can get clogged easily. The frequent filter replacement can be inconvenient as this requires regular maintenance.

Features and aesthetics

  • Electric:Advanced features and aesthetics

Electric water purifiers come with superior aesthetics and newer designs that make your kitchen look more attractive. Pureit RO water purifiers not only offer beautiful looking purifiers but also are laden with best-in-class features like Advanced Filter Alerts, Water Level Indicators, Digital Purity Indicators etc.

  • Non-Electric:Basic features and aesthetics

Non-electrical water purifiers require space in the kitchen as most of them are table-top devices. They have only basic purification features and designs

Maintenance cost

  • Electric:Slightly higher maintenance cost

As an RO water purifier has a more efficient purification technology, it’s slightly expensive to maintain. The average cost of RO water purification comes to 50 paise per litre. But a UV water purifier on the other hand comes with the lowest maintenance cost at only 30 paise per litre.

  • Non-Electric: Lower maintenance cost

Non-electric water purifiers have a low maintenance cost at 35 paise per litre.

Device cleaning

  • Electric:Less frequent

Electric water purifier devices are built to require occasional cleaning that is only once in 12- 14 months. 

  • Non-Electric:More frequent

Non-electric water purifiers require very frequent cleaning that is every 3 – 4 months.

In conclusion, each water purifier comes with its own features and benefits and thus should be assessed basis individual requirement. In places where there is already an effective water filtration system, a non-electric water purifier could do the purification job. Whereas if the TDS levels in the water are excessive or water seems to be more contaminated, electric water purification should be preferred.


  • What is a non-electric water purifier?

    Non-electric water purifiers are also known as gravity-based or UF water purifiers. They are mostly portable which makes them a great option if you have to move frequently. These water purifiers are useful when you receive water from sources like municipal water supplies that generally have low TDS (total dissolved solids) levels.

  • What is an electric water purifier?

    RO UV water purifiers are usually known as electric water purifiers. RO helps in removing dissolved solids (TDS) from the water and also makes hard water soft. UV water purifiers help in killing microorganisms.

  • How does a non-electric water purifier work?

    As the name suggests, non-electric purifiers work without electricity as they use gravity or water pressure as their power to purify water. Non-electric water purifiers like sediment filters remove sediments or materials which then stick to the bottom of the water container.

  • Which water purifier is best -electric or non-electric?

    Non-electric water purifier consists of a sediment filter, activated carbon water purifier, and UF water purifier. Electric water purifiers consist of RO & UV water purifiers. Electric purifiers might cost more but they remove all the dissolved solids and water-borne disease-causing bacteria, viruses. Non-electric purifiers can remove dissolved chemicals, germs & viruses, and suspended matter, silt, or sand from the water. Purifiers must be selected comparing the contamination level at your home because both types of purifiers have different functionalities to perform.

  • Are non-electric water purifiers safe?

    Remember that non-electric purifiers are suitable when the TDS level at your home tap water is under consumable limits and doesn't have any heavy metals which are harmful to the health. It can remove microbes like bacteria, viruses, and pesticides.

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