When Should You Change the Filters of Your Water Purifier?

You should change your water purifier filters when you notice reduced water flow, cloudy appearance, bad taste, unusual noises, increased reject water, maintenance alerts, or after exceeding the manufacturer’s recommended usage period to ensure safe, clean, and fresh-tasting water.

Flow Rate Is Slower Than Usual

A noticeable decrease in water flow indicates filter clogging. This means impurities are blocking the filtration process, and replacing the filter will restore proper water pressure and flow.

Cloudy Or Discolored Water

If purified water appears cloudy or has a strange color, it often means the filter can no longer trap fine particles, making immediate replacement necessary to ensure water safety.

Bad Taste or Less Sweet

When water tastes bitter or metallic or simply loses its natural sweetness, the carbon filter might be saturated and unable to remove taste-altering contaminants effectively.

Unusual Noises from the Purifier

Strange humming, buzzing, or vibrating sounds from the purifier can indicate blocked filters, causing the motor or pump to work harder than normal to push water through.

More Water Gets Wasted As Reject Water

If your RO purifier produces more reject water than usual, it may mean the RO membrane or pre-filters are clogged and need prompt replacement to restore efficiency.

Maintenance Alerts from Smart Purifiers

Modern purifiers have filter change indicators or digital alerts. When these turn on, it’s a direct signal to replace the filter for continued safe and clean water.

Exceeded Recommended Usage Time

Every filter has a maximum usage lifespan. Using it beyond the recommended period can reduce efficiency and risk contamination, so replacement on schedule is necessary.

water purifier filters need to be changed

General Timeline for Changing Water Purifier Filters

Sediment filter: Every 6–12 months, depending on water quality.

Carbon filter: Replace every 6–12 months for best taste and odor removal.

RO membrane: Lasts 2–3 years with proper pre-filter maintenance.

UV lamp: Change yearly to maintain germicidal effectiveness.

You can maintain the filters by following the above guidelines. However, if you ever need any help, Shift Tech BD provides water purifier service and maintenance in Dhaka with their experienced team. Not only in Dhaka, but we also provide water purifier service and maintenance in all of Bangladesh.

We specialize not only in water purifier installation and maintenance but also offer a wide range of additional services to meet our customers’ needs. Our solutions include:

Frequently Asked Questions About When You Should Change the Filters of Your Water Purifier

What are the signs that your water purifier filters need to be changed?

Answer: Reduced water flow, bad taste, unusual odor, cloudy water, excess reject water, strange noises, and maintenance alerts are clear signs your purifier filters need replacement.

Question: How often should I replace my purifier filter?

Answer: Most purifier filters require replacement every 6–12 months, depending on usage, water quality, and filter type. RO membranes and UV lamps may last longer.

Question: What happens if the water filter is not changed on a timely basis?

Answer: Delaying filter changes can cause bacterial growth, bad taste, reduced efficiency, higher maintenance costs, and potential health risks from drinking contaminated water.

Question: How long do water purifier filters last?

Answer: Sediment and carbon filters last 6–12 months, RO membranes about 2–3 years, and UV lamps around 1 year, depending on usage and water quality.

Question: Why is it bad to drink water from an old filter?

Answer: Old filters lose efficiency, allowing bacteria, chemicals, and sediments to pass through, making water unsafe and potentially harmful to your health over time.

Question: When should I replace my carbon filter?

Answer: Replace your carbon filter every 6–12 months, or sooner if water develops an unpleasant taste, smell, or discoloration, ensuring continued effective filtration performance.

Question: How to make a water filter last longer?

Answer: Pre-clean the purifier, use a pre-filter, service regularly, avoid excess water wastage, and follow the manufacturer’s guidelines to extend your filter’s lifespan.