An RO membrane should not be replaced blindly; check TDS first. The correct recommendation depends on inlet and purified-water TDS, water flow, pump pressure, pre-filter condition, purifier model, and the source water used at your home.
Membrane replacement costs in Delhi NCR vary because municipal, borewell, and tanker water can place very different demands on the same purifier.
What does an RO membrane do?
The membrane is the main component that reduces dissolved solids during RO purification. It is different from sediment and carbon filters, which handle dirt, chlorine, odour, and other filter-stage work.
A membrane needs suitable pressure and properly working pre-filters. If the pump is weak or the filters are choked, membrane output can fall even when the membrane itself is still usable.
When an RO membrane may need replacement
A membrane may need replacement when testing shows that it no longer reduces TDS adequately, output remains very low despite normal pressure and clean filters, or its performance has declined under the home's inlet-water conditions.
Higher-TDS groundwater in parts of Delhi, Gurgaon, Noida, Faridabad, and Ghaziabad can place more load on a membrane. However, high purified-water TDS can also involve a flow restrictor, TDS controller, mixing setting, pressure issue, or incorrect membrane compatibility.
Common membrane warning signs
High purified-water TDS
A significant rise in purified-water TDS is a reason to inspect the membrane and related controls. Compare the reading with inlet TDS instead of relying on one output number alone.
Low water flow
A choked membrane can slow output, but clogged pre-filters, low pressure, a valve fault, or weak pump can do the same. Read the slow RO water flow guide before assuming the membrane is at fault.
Bad taste or smell
Taste or smell changes can involve filters, stagnant water, storage tank hygiene, source-water changes, or membrane performance. Inspection helps separate these causes.
Approximate RO membrane replacement cost
- 1000 TDS membrane: ₹1,300 + ₹99 Online Visit/Service Charge where applicable
- Above 2000 TDS membrane-only solution: ₹2,100 + ₹99 visit
- Membrane + pump solution: ₹3,900 + ₹99 visit
Final suitability and cost depend on technician inspection and customer approval. Prices inclusive of GST, with GST invoice support. The Pay After Service Visit Charge is ₹249 when that booking option is selected.
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Checks before replacing a membrane
- Measure inlet and purified-water TDS.
- Check water flow and storage tank filling time.
- Inspect sediment and carbon filter condition.
- Confirm pump pressure and valve operation.
- Confirm membrane capacity and purifier compatibility.
- Ask whether a TDS controller or flow restrictor needs adjustment.
If your main concern is the output reading, the ideal drinking-water TDS guide explains how to interpret it. Routine checks can be booked through the RO service page.
Why membrane quality and compatibility matter
A very cheap or unsuitable membrane may produce inconsistent TDS, weak flow, or a shorter useful life. The right capacity, water conditions, installation quality, pre-filter care, and invoice-backed terms matter more than choosing only by price.
The 60 Days Service Warranty means no visit/service charge for the same reported problem within warranty terms. Parts, filters, membrane, fittings, consumables, or replacements are charged separately unless covered by invoice or plan terms. A different or unrelated issue may require a new charge. For help before booking, contact RO Service Wala.
Frequently asked questions
How long does an RO membrane last?
There is no universal lifespan. Inlet TDS, usage, pre-filter care, pressure, membrane compatibility, and source-water changes all affect it.
Can high TDS always be fixed by changing the membrane?
No. The membrane, flow restrictor, TDS controller, mixing settings, pressure, and other components may need checking.
Should a membrane be changed only because it is old?
No. Replacement should be supported by TDS readings, flow, inspection, and compatibility.
Are the listed membrane prices inclusive of GST?
Yes. Prices are inclusive of GST, and final approved work should be shown on the invoice.