Water filter buying guide
Price checked: September 2026 · Confirm availability before payment
A water-filter price only makes sense when you know what is included. Compare the treatment stages, complete installment total, installation conditions, written warranty, consumables, and after-sales support—not only the lowest advertised monthly number.
The current Aqualife RO cash price is LKR 54,900. The installment calculation is LKR 15,000 upfront + LKR 5,990 × 10 months = LKR 74,900 total. Terms, eligibility, service area, and availability must be confirmed.
Why do RO water-filter prices differ?
Two units described as “RO filters” can have different pre-treatment, membrane capacity, tank size, fittings, electrical components, warranty terms, and service arrangements. A cheaper unit can cost more over time if compatible cartridges are difficult to obtain or if installation and travel are charged separately.
Brand claims alone are not enough. Ask for the actual stage sequence and a written explanation of what is included. If a seller quotes a laboratory result, confirm whether it applies to the exact model, which sample was tested, and whether public use of the laboratory name is authorised.
Compare the total payable amount
| Option | Calculation | Total |
|---|---|---|
| Current cash offer | One payment | LKR 54,900 |
| Installment option | LKR 15,000 + LKR 5,990 × 10 | LKR 74,900 |
| Difference | Installment total minus cash offer | LKR 20,000 |
Do not compare LKR 5,990 with another seller’s cash price as if they were the same. Compare total with total. Ask about late-payment terms, approval requirements, ownership conditions, and the payment recipient before sending money.
What is included in the current Aqualife offer?
- Six-stage alkaline RO system with an 18 litre storage tank
- Transport and installation, subject to service-area and site confirmation
- Basic water test completed during installation, not promised as a separate advance visit
- One-year warranty under the written warranty terms
- Assistance identifying compatible replacement cartridges and parts
Extra plumbing, electrical work, difficult access, relocation, travel outside the included area, consumables, replacement parts, and work outside warranty may be chargeable. Confirm the final scope in writing before installation.
Budget for maintenance, not only purchase
Sediment and carbon cartridges are consumables. Their usable interval depends on source-water quality, household use, and cartridge condition. The RO membrane and mineral stage also need assessment over time. There is no responsible single replacement promise that fits every home.
Before buying, ask whether the seller can identify the exact replacement size and connection type, how service requests are recorded, and whether labour or travel is separate. For the external first-stage cartridge, see our pre-filter maintenance guide.
Questions to send with your enquiry
- What is my water source—mains, well, or another source?
- Which district and town is the installation in?
- Is the cash or installment option preferred?
- Is there a nearby water line, drain, power point, and suitable space?
- What is included and what may be charged separately?
