How Often to Change RO Filter in Roorkee: A Simple Schedule

By Sanchit Jain, RO technician and owner of Sanchit Enterprises, Roorkee (since 2014). Updated October 2026.

How often to change RO filter cartridges depends mostly on your water. In Roorkee, many homes run their RO on borewell or submersible water that carries silt and high TDS, so filters choke faster than the box suggests. A rough schedule helps, but the real test is how the purifier is behaving.

Below is the schedule we follow on service visits across Roorkee, and the signs that tell you a filter is due early.

How often to change RO filter: the quick schedule

• Sediment pre-filter: every 3 to 6 months.
• Carbon filters (pre and post): every 6 to 12 months.
• RO membrane: about every 1 to 2 years.
• UV lamp: about once a year, even if it still glows.

These are typical ranges. Muddy or very hard water pushes you to the short end; low-TDS municipal water lets you stretch to the long end. Your purifier’s manual may give its own numbers, and those are worth following.

Why Roorkee water changes the answer

Silt from borewells and overhead tanks clogs the sediment filter first, especially after the monsoon. High TDS and hardness scale the membrane faster. So when people ask how often to change RO filter cartridges here, our honest answer is: sooner than in a city with soft supply water.

A TDS meter reading before and after the RO tells you a lot. If output TDS keeps creeping up, the membrane is wearing.

Signs a filter is due early

• Water flow drops or the tank takes much longer to fill.
• The taste or smell changes, often a sign the carbon filter is spent.
• Output TDS rises, which points to the membrane.
• The pre-filter housing looks brown or muddy.
• The UV indicator or service light is on.

If you see any of these, do not wait for the calendar date.

Change filters yourself or book a technician?

A sediment cartridge in a clear housing is easy to swap. Membranes, carbon inline filters and UV lamps need the right part for your model and a proper flush afterwards, so most families prefer a visit. See RO filter replacement in Roorkee or, for regular visits on schedule, RO AMC in Roorkee.

Whatever you do, the goal is drinking water within the BIS IS 10500 limits.

A simple rule to remember

If you remember one thing about how often to change RO filter parts: pre-filter twice a year, carbon once a year, membrane when TDS or flow says so, and UV yearly. Write the date on the housing with a marker when you change it.

How often to change RO filter: frequently asked questions

How often should I change my RO membrane?

Usually every 1 to 2 years, sooner with high-TDS or very hard water. A rising output TDS is the clearest sign.

What happens if I do not change RO filters?

Flow drops, taste worsens, and a choked pre-filter can damage the membrane and pump, which costs more to fix.

Is the schedule the same for every brand?

Roughly, yes. Kent, Aquaguard, Livpure and others use similar stages, though cartridge sizes differ.

Do you change filters at home in Roorkee?

Yes, usually the same day.

Related: RO filter replacement · RO AMC in Roorkee · What is done in RO servicing