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What is an RO water filter?

What is an RO water filter?
May 19, 2025 ARTICLES

1. Introduction to RO Water Filters

A Reverse Osmosis (RO) water filter is one of the most effective systems used for water purification today. RO technology eliminates impurities, chemicals, and harmful contaminants from water, making it safe for drinking. If you're looking to improve your home’s water quality, a domestic RO filter is a great choice.

This blog will guide you through how RO systems work, their benefits, different models, and most importantly, the RO filter price and what factors influence it.


2. How Does an RO Water Filter Work?

An RO water filter uses a semi-permeable membrane to remove up to 99% of dissolved salts, heavy metals, chlorine, fluoride, bacteria, and viruses.

The Process:

  1. Pre-Filtration – Removes larger particles like dust and rust.

  2. Carbon Filtration – Eliminates chlorine and organic contaminants.

  3. RO Membrane – Removes dissolved salts and heavy metals.

  4. Post Carbon Filter – Improves taste and odor.

  5. UV/UF Stage (Optional) – Provides additional protection from microorganisms.


3. Components of a Domestic RO Filter

A domestic RO filter includes several essential components:

  • Sediment Filter

  • Activated Carbon Filter

  • RO Membrane

  • Storage Tank

  • UV Chamber (in some models)

  • Pump and SMPS

Each component plays a crucial role in purifying water. The performance and longevity of each part impact the overall RO filter price.


4. Types of RO Water Purifiers

Here are the most popular types:

Type Description Ideal For
Wall-mounted Installed on kitchen wall Compact homes
Table-top Can be placed on counter Medium space
Under-sink Hidden below sink Modern kitchens
Commercial RO High output capacity Offices/Industries

Choosing the right type depends on your water usage and space availability.


5. Benefits of Using a Reverse Osmosis Water Purifier

A reverse osmosis water purifier offers multiple benefits:

  • Removes up to 99% of contaminants.

  • Enhances taste and odor of water.

  • Ideal for areas with high TDS levels.

  • Reduces risk of water-borne diseases.

  • Offers multi-stage purification.


6. RO Filter Price: What Affects It?

The RO filter price in India varies based on several factors:

On average, domestic RO filter prices in India range from ₹4,000 to ₹20,000. For commercial models, it can go up to ₹1 lakh and beyond.


7. RO Filter Price Comparison: Domestic vs. Industrial

Category Price Range Application
Domestic RO Filter ₹4,000 – ₹20,000 Home use
Commercial RO Plant ₹25,000 – ₹5,00,000+ Business/Industrial use

Domestic models are compact and cost-effective, while industrial models are designed for large-scale water purification.


8. Tips for Choosing the Best Water Purifier for Home

Looking for the best water purifier for home? Here are some tips:

  • Check Water Source: Borewell, tank, or municipality?

  • Test TDS Level: RO is ideal for high TDS (>200 ppm).

  • Look for Multi-stage Filtration: 5 to 7 stages is ideal.

  • Warranty & Service: Prefer brands with strong after-sales support.

  • Compare RO Filter Prices: Make sure to compare features and reviews.


9. Maintenance and Filter Replacement Cost

RO filters require regular maintenance to function effectively.

Component Replacement Interval Approximate Cost
Sediment Filter Every 6 months ₹200 – ₹400
Carbon Filter Every 6–12 months ₹300 – ₹600
RO Membrane Every 1–2 years ₹1,000 – ₹2,500
UV Lamp Every 1 year ₹500 – ₹1,000

Annual maintenance cost can range between ₹1,500 and ₹4,000 depending on usage.


10. Conclusion: Is a RO Filter Worth the Price?

Yes, investing in a reverse osmosis water purifier is worth it—especially if you live in areas with poor water quality. Clean drinking water is crucial for your family’s health, and the RO filter price is a small cost for long-term benefits. By choosing the right system and maintaining it properly, you can enjoy safe and tasty water every day.


11. Frequently Asked Questions (FAQs)

Q1: What is the average RO filter price in India?

A: Domestic RO filters typically range from ₹4,000 to ₹20,000 depending on features and brand.

Q2: Is RO water better than boiled water?

A: RO water removes dissolved salts and metals which boiling cannot, making it a better option in most cases.

Q3: How often should I change my RO filters?

A: Sediment and carbon filters every 6–12 months, RO membrane every 1–2 years.

Q4: Which is the best water purifier for home in India?

A: Brands like Kent, Aquaguard, Livpure, and ROmegaMart's own options offer great domestic RO filters.

Q5: Where can I buy a reliable RO water filter online?

A: Visit ROmegaMart for high-quality domestic and industrial RO systems at competitive prices.