Parashu^® Secure (RO+UV) — Alkaline Drinking Water Purifier for Homes and Offices

What is the Parashu^® Secure alkaline RO+UV water purifier?

Reverse osmosis is the most effective way to deal with water that carries too many dissolved salts — the brackish, hard or salty water that comes out of many borewells around Kolkata, and that municipal supplies sometimes deliver too. The catch is that RO is not selective. Along with the unwanted salts, it strips out the calcium, magnesium and other minerals that give drinking water its natural taste, leaving water that can taste flat and turn slightly acidic.

Parashu^® Secure solves both problems in one unit. It purifies first — pre-filters, RO and UV — and then finishes the water in an alkaline mineral chamber, so what reaches your glass is not just clean but balanced.

What is alkaline drinking water, and why does an RO purifier need it?

The pH scale runs from 0 to 14, with 7 as neutral. Water with a pH above 7 is alkaline; below 7 it is acidic. Natural spring and good-quality groundwater usually sit around neutral or slightly above, largely because of the minerals dissolved in them.

An RO membrane removes most of those minerals. Water with very little dissolved mineral content readily absorbs carbon dioxide from the air, which forms a weak acid and can pull its pH below neutral. That is why plain RO water often tastes flat or "empty".

The alkaline stage in Parashu^® Secure addresses this directly. As the purified water passes through the alkaline cartridge it picks up minerals again and its pH rises, giving you:

• Better taste — re-mineralised water tastes fuller and fresher than bare RO water.
• Corrected pH — the slight acidity that RO water can develop is neutralised.
• Minerals restored — you keep the purity of RO without drinking demineralised water.

How the purification stages work

Each stage protects the next. The pre-filters keep particles, iron, hardness and chlorine away from the RO membrane, which is the most sensitive and most valuable part of the system. UV then disinfects the purified water, and the alkaline stage finishes it.

1. Sediment (PP) pre-filter

   A polypropylene cartridge traps sand, silt, rust flakes and other suspended particles before they can clog the stages that follow.

2. Softener — iron and white-scale treatment

   Treats dissolved iron and the hardness that forms white scale. This protects the RO membrane from scaling and fouling, which are the most common reasons an RO membrane fails early on borewell water.

3. Activated carbon pre-filter

   Adsorbs organic contamination and the compounds behind bad taste and odour, including chlorine from treated municipal water — which would otherwise damage the RO membrane.

4. Reverse osmosis (RO) membrane

   Water is pushed through a semi-permeable membrane that holds back dissolved salts, hardness and other dissolved impurities. This is the stage that brings down high TDS. The removed salts leave the system in a separate reject stream.

5. UV (ultraviolet) chamber

   Ultraviolet light disrupts the genetic material of bacteria and viruses so they cannot multiply — disinfection without chemicals and without any change in taste.

6. Alkaline and mineral infusion stage

   The purified water passes through an alkaline mineral cartridge that re-infuses minerals and raises the pH, turning flat RO water into balanced, better-tasting drinking water.

RO+UV alkaline or UF+UV: which one does your water need?

The deciding number is total dissolved solids (TDS), measured in mg/L (often shown as ppm on a TDS meter). IS 10500:2012 sets 500 mg/L as the acceptable TDS limit for drinking water, and allows up to 2,000 mg/L only where no alternative source is available. If your water is above 500 mg/L, or tastes salty or brackish, you need RO. If it is comfortably below and tastes fine, UF+UV keeps the water's natural minerals without any reject water.

Not sure of your TDS? A handheld TDS meter gives a reading in seconds, or send us a message on WhatsApp and we will help you pick the right model. You can also see the Parashu^® Secure (UF+UV) or browse all drinking water purifiers.

Who the alkaline RO+UV purifier is designed for

• Borewell-supplied homes where the water tastes salty, leaves heavy white scale on kettles and utensils, or reads high on a TDS meter.
• Families who want RO purity without flat-tasting water — the alkaline stage gives back the minerals RO removes.
• Offices and home offices (SOHO) that need a reliable, permanent drinking water point for staff and visitors.
• Homes on mixed supply that switch between municipal and borewell water and need a purifier that handles the worse of the two.

If iron in your borewell water is heavy enough to stain tiles, buckets and clothes, fit a whole-house iron removal filter upstream. It protects the RO membrane, extends cartridge life and clears iron from every tap in the house.

Parashu^® Secure (RO+UV) alkaline specifications

Installation and service in Kolkata

Parashu^® Secure is a permanent, point-of-use installation: it is connected to your water line and a drain point for the RO reject, and fitted at the kitchen or pantry with its own dispensing tap. Installation and after-sales support are handled directly by the Ira Waters team, which is why the purifier is currently sold only in and around Kolkata. Shipping is always free.

How long the RO membrane, pre-filters, alkaline cartridge and UV lamp last depends on your raw water and daily use — high-TDS or iron-rich water works the system harder. Our team will advise a replacement schedule for your water at installation. To order, use the online store, call +91-9038057899, or visit us at 56/1/C Garcha Road, Ground Floor, Kolkata 700019.