Top things about gravity water purifier you wish you knew

Top things about gravity water purifier you wish you knew

Spread the love
  •  
  •  
  •  
  •  
  •  
  •  
  •  

Gravity based water purifiers rely on gravity as the name suggests for purifying water. This implies that no electricity is required for its working. However, it works only if the TDS or total dissolved solids is less than 200ppm. For higher TDS we recommend RO/RO+UV water purifiers. 

Since, these do not use electricity you have to manually pour water into the water purifier frequently. This could be cumbersome especially for old people. Moreover, manual intervention would be required for proper maintenance. 

Some models require you to clean the filter periodically. While other models need replacement of cartridges. This pushes up the maintenance cost. Hence, there is a trade-off between time spent vs money spent towards maintenance. Since, the initial cost is very low, this balances the trade-off. 

Choosing a water purifier can be time consuming. We understand that most people are busy to do a detailed research. Hence, we have prepared a comparison table which shows top 5 water purifiers including key features and their rating

If you would still like to read detailed reviews, please use the navigation from the below table of contents to read reviews of only the product you are interested in.

If you are interested to read about RO water purifiers, we recommend you to check out our water purifiers under Rs 15K​ and  Top 5 water purifiers under Rs 10K.

Product
Key Features
Our Rating
1. Kent Gold, 20L
Kent Gold

1. Table top with large body


2. Does not use chemicals


3. Low maintenance cost


4. Regular cleaning needed

2. Kent Gold Star, 22L
Kent Gold Star

1. Large body, can be wall-mounted or used as counter top


2. Does not use chemicals


3. Low maintenance cost


4. Regular cleaning needed

3. Tata Swach Cristella Plus, 18L
Tata Swach cristella

1. Does not use chemicals


2. Auto-shut off and water level indicator


3. Fuse indicates useful life of membrane


4. Only 2-stage purification

4. HUL Pureit Advanced, 23L
Pureit Advanced

1. Uses chlorine to kill germs


2. Relatively expensive to maintain


3. Germkill life indicator


4. Auto shut-off if the kit is not replaced

5. Livpure Brahma, 16L
Livpure Brahma

1. Adds b


2. TDS upto 2000


3. Cartridge replacement indicator


4. 6-stage purification

Our work does not end with helping you to select the best water purifier! We want you to know what happens next. Please see the below review.
amazon-installation

​Do you notice anything in the above comment?

Havells is good in other areas but not in installation.

This is exactly what I want you to avoid. Unlike the person who wrote this, you are a savvy consumer. ​​

Most people do not know that some brands require you to call them for installation. All this information is available but hidden in the thick Amazon jungle. Hence, we have collated all information regarding installation in a helpful handbook! 

  • ​Do you know HOW MUCH brands charge for installation? Avoid getting cheated!
  • ​Do you know HOW TO contact a brand for installation? Save valuable time​​​​​​!
  • ​Do you know WHICH BRANDS give a demo after purchase? Avoid surprises!​​​​​​

​​​If your answer​​​​​​is NO to any of the above questions, then you should read our e-book. 

Grab your FREE COPY of our helpful e-book NOW!

1. Kent Gold, 20L

Kent Gold

Kent is a market leader in water purifiers and a reliable brand. It has as many as 6 variations under its gravity based water purifier product line. All Kent water purifiers under this segment use a pre-filter, activated carbon and a membrane to purify water. 

Kent's products do not use chlorine or other chemicals. It relies on the 0.1 micron UF membrane to keep away bacteria, virus and cysts. Maintenance cost is low as all the parts can be cleaned and re-used for some time. If maintained properly, this can last up to 2 years, provided the TDS of the water is not too high. 

The pre-filter can be removed, washed and replaced easily. Similarly, the membrane can also be easily removed and cleaned. However, do not forget to backwash the membrane to completely remove the accumulated mud. Watch the video at the end to see how to maintain your water purifier. 

PROS
  • Does not use chemicals
  • Convenient counter-top model with large storage tank
  • check
    Low maintenance cost: Approx Rs 750 per year
  • check
    Membrane life: 4,000L 
CONS
  • Mud particles accumulate and obstruct flow of water if not cleaned regularly
  • Times Circle
    Some amount of time needs to be spent on cleaning 

2. Kent Gold Star, 22L

Kent Gold Star

Kent Gold Star is similar to Kent Gold except for the fact that its storage tank is relatively bigger at 22L. It can be either wall mounted or used a counter top. Otherwise it is similar to Kent Gold in all aspects. 

Kent's products do not use chlorine or other chemicals. It relies on the 0.1 micron UF membrane to keep away bacteria, virus and cysts. Maintenance cost is low as all the parts can be cleaned and re-used for some time. If maintained properly, this can last up to 2 years, provided the TDS of the water is not too high. 

The pre-filter can be removed, washed and replaced easily. Similarly, the membrane can also be easily removed and cleaned. However, do not forget to backwash the membrane to completely remove the accumulated mud. Watch the video at the end to see how to maintain your water purifier. 

PROS
  • Does not use chemicals
  • Convenient counter-top model or can be wall mounted
  • check
    Suitable for family of 4-5 due its large storage capacity
  • check
    Low maintenance cost: Approx Rs 750 per year
  • check
    Membrane life: 4,000L 
CONS
  • Mud particles accumulate and obstruct flow of water if not cleaned regularly
  • Times Circle
    Some amount of time needs to be spent on cleaning 

3. Tata Swach Non Electric Cristella Plus, 18L

Tata Swach cristella

Tata's Swach range of gravity based water purifiers use a mesh and a membrane. So , it is only 2-stage purification compared to other competitors who have 3-stage purification. They do no use chemicals for purification. 

The cost of maintenance is slightly higher compared to Kent models but less than Pureit's water purifiers. There have been complaints of water leakage and bad customer service.

The Tata Swach bulb is at the core of the water purifier.  It contains top mesh, the main bulb and bottom mesh. Manual intervention required for maintenance. The top mesh needs to be cleaned weekly and bottom mesh at least monthly. The cartridge has to be replaced after 3,000L or 6 month whichever is earlier. 


PROS
  • No chemicals are used
  • Auto shut-off and water level indicator available
  • check
    Membrane life: 3000L
  • check
    Fuse indicates useful life of the bulb that is left
CONS
  • Only 2-stage purification process
  • Times Circle
    Water leakage has been reported by some customers
  • Times Circle
    Frequent manual cleaning of the meshes is required

4. HUL Pureit WPAD100 Advanced, 23L

Pureit Advanced

HUL Pureit was one of the first to introduce gravity based water purifiers before the RO purifiers became famous. Pureit has 5 products under this segment. 

All Pureit water purifiers use a proprietary technology which it calls Germkill technology. The products typically have activated carbon, the Germkill kit and a polisher. The kit uses a chlorine capsule which kills the bacteria and other microorganisms. The polisher removes the chlorine to give pure water. 

Pureit water purifiers have auto-shut off facility which cuts off the water supply if the kit is not replaced. There is also an indicator to let you know when the kit should be replaced. The kit lasts for a good few months but it is relatively expensive to replace compared to other models. 


PROS
  • Large storage tank 
  • Uses a proprietary Germkill technology 
  • check
    Germkill life indicator alerts when the kit needs to be replaced
  • check
    Membrane life: 3000L
  • check
    Auto-cut off shuts off water flow if the kit is not replaced
CONS
  • Uses chlorine for purification. Chances are high that residual chlorine could be found in the purified water
  • Times Circle
    Relatively expensive to maintain: Approx cost to maintain could be between Rs 1,200 to Rs 1,500 per year

5. Livpure Brahma, 16L

Livpure Brahma

Livpure Brahma involves a 5-stage purification process. 

  • Particulate Filter: Removes impurities such as dirt, sand, and other dissolved particles
  • Sediment Filter: Further removes remaining particles of dust and sand.
  • Bacteriostatic Activated Carbon Filter cum Absorber: Removes all the organic impurities,  chlorine but not inorganic particles. 
  • Protector Filter: This is to provide additional protection to the main UF membrane thereby increasing its life
  • Anti Kitanu UF membrane: The core UF Membrane removes micro-organisms such as bacteria, algae, fungus and is the final stage of prufication
PROS
  • 5-stage purification process
  • Membrane life: 4,000L
  • Livpure claims shelf life of 3-years
  • check
    12 months warranty
  • check
    Comes with external pre-filter
CONS
  • Time for maintenance is more with increased number of components
  • Purification rate can drop if not cleaned regularly

6. Gravity based water purifier buying guide

1. Criteria to keep in mind before purchasing a gravity water purifier

  • Water source
  • After sales service
  • Cost (Initial and maintenance)
  • Storage capacity
  • Use of chemicals
  • Life of membrane

2. Components found in UF water purifier

Pre-filter/mesh: This is the first level of removing impurities such dissolved particles.

Activated carbon trap: The carbon traps chemicals and other impurities by absorption, and removes foul odour.

Membrane: Finally, water passes through a UF membrane which removes all bacteria, microorganisms and cysts, allowing only pure water to flow through.

There are some minor variations as some brands use chemicals such as chlorine and bromine to kill bacteria and further use a polisher to remove these chemicals.

3. Maintaining your UF water purifier

Although gravity water purifiers entail relatively low maintenance and low cost, there are few things you should remember to improve the life of the membrane.

  • Regular cleaning: Kent models require regular cleaning. This is mandatory because if not done the water flow would be obstructed. If you leave the mud to accumulate, it will also affect the life of the membrane. The below video shows in detail how to clean a Kent water purifier.
  • Besides cleaning the parts, it is important to clean the plastic body, at least once in a month. You could use a lemon to wipe the interior clean. Then rinse with water.
  • If the water has iron content, you will notice that the pre-filter/mesh would have turned to red colour. Do not worry, soak the mesh in vinegar for few hours, if possible overnight. And then clean wash it thoroughly and use.
  • Once you install the product, flush out at least two batches of water. Do not start using the purifier without doing this. This is to avoid the smell associated with the new unit.
Video Source: Soumens Tech

Leave a Comment