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RO Filter and Membrane Replacement: Cost and How Often

Herritech engineering teamUpdated 30 September 20263 min read

RO Filter and Membrane Replacement: Cost and How Often
Pictured: carbon block filter cartridge (left) and a 4040 RO membrane (right).
Quick answer: Pre-filters (sediment and carbon cartridges) are the cheapest and are changed most often, usually every 3–6 months at home. The RO membrane lasts longer, typically 1–3 years depending on the water and how well the pre-filters are kept. Current H-TECH prices are listed below.
Key facts
  • Sediment and carbon cartridges: every 3–6 months (home)
  • RO membrane: typically every 1–3 years
  • Good pre-filtration makes the membrane last longer
  • Rising TDS in product water = time to check the membrane
On this page
  1. Filter cartridges
  2. Replacement membranes: home and small systems
  3. Replacement membranes: commercial and industrial
  4. How often to change what
  5. Frequently asked questions

Filter cartridges

Polypropylene Sediment Filter Cartridges 10″ Big Blue price in KenyaPolypropylene Sediment Filter Cartridges 10″ Big BlueKSh 350Polypropylene Sediment Filter Cartridges 20″ Slimline price in KenyaPolypropylene Sediment Filter Cartridges 20″ SlimlineKSh 700Taste & Odour Removal Cartridge price in KenyaTaste & Odour Removal CartridgeKSh 1,200Carbon Block Coconut Shell Big Blue Cartridges (1um) price in KenyaCarbon Block Coconut Shell Big Blue Cartridges (1um)KSh 1,300
ProductPrice
Polypropylene Sediment Filter Cartridges 10″ Big BlueKSh 350
Polypropylene Sediment Filter Cartridges 20″ SlimlineKSh 700
Taste & Odour Removal CartridgeKSh 1,200
Carbon Block Coconut Shell Big Blue Cartridges (1um)KSh 1,300

Current listed prices incl. VAT (updated 30 September 2026).

Replacement membranes: home and small systems

MembranePrice
50GKSh 1,750
75GKSh 1,750
100GKSh 2,150
3012 200GKSh 3,600
3013 400GKSh 4,650

Current listed prices incl. VAT (updated 30 September 2026). Order: H-TECH RO Membrane Replacement Range.

Replacement membranes: commercial and industrial

MembranePrice
4021KSh 14,500
BW-8040KSh 84,100
ULP11-4040KSh 24,600
ULP31-4040KSh 24,600
LP21-4040KSh 33,400
ULP22-8040KSh 113,100
ULP32-8040KSh 113,100
LCLE-4040KSh 72,500
LCHR-4040KSh 79,800
BW30-4040KSh 79,800
ESPA1-4040KSh 62,400
ESPA2-4040KSh 62,400
YQS-4040KSh 37,700
ESPA2-7（8040）KSh 203,000

Current listed prices incl. VAT (updated 30 September 2026). Order: H-TECH RO Membrane Replacement Range.

How often to change what

PartHome systemCommercial system
Sediment cartridge3–6 monthsWhen pressure drop rises (often monthly)
Carbon cartridge6 monthsAs scheduled by your service plan
RO membrane1–3 yearsWhen TDS or output drops after cleaning

Related: RO maintenance and why RO plants need antiscalant.

Watch: RO purifiers and water ATMs

Water ATM, bottle rinser and RO water purifierVideo · 1:16 · Herritech Ventures on YouTube
H-TECH 500 LPH 3-in-1 RO vending machineVideo · 0:23 · Herritech Ventures on YouTube
Subscribe on YouTubeFollow us on TikTokAll videos

Frequently asked questions

How much does it cost to replace RO filters?

Sediment and carbon cartridges are the cheapest parts; see the current prices above.

How often should I change my RO membrane?

Typically every 1–3 years, depending on the water and how well the pre-filters are kept.

How do I know my RO membrane needs replacing?

The TDS of the product water rises, or output drops, even after changing the pre-filters.

Do you sell membranes for commercial RO plants?

Yes: 4021, 4040 and 8040 membranes are listed above.

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