How We Ranked These Purifiers

This ranking is based on five criteria that actually matter: purification effectiveness, real-world water wastage ratio, annual service and filter replacement cost, after-sales service quality, and value for money. No brand paid for placement. Every model is available through authorised dealers in Bangladesh.

1. A. O. Smith Z8 β€” Best Overall

The Z8 consistently tops independent tests for TDS reduction (up to 98%) and includes a built-in mineral cartridge that re-adds calcium and magnesium after RO filtration β€” chemically pure water that still tastes natural.

  • Purification stages β€” 8 (Sediment β†’ Pre-Carbon β†’ RO β†’ Mineraliser β†’ UV β†’ UF β†’ Post-Carbon β†’ Tank)
  • TDS range β€” Handles up to 2000 ppm
  • Water wastage ratio β€” ~50:50 (industry-leading)
  • Tank capacity β€” 10 litres
  • Annual filter cost β€” ৳3,500–৳4,500
  • Price range β€” ৳28,000–৳35,000

Why it wins: The mineraliser solves RO's biggest drawback β€” flat, demineralised water. Spare parts are widely stocked across Bangladesh. The 50:50 wastage ratio is dramatically better than the industry-standard 3:1.

2. Kent Grand Plus β€” Best for High TDS Areas

RO + UV + UF with TDS Controller, the go-to recommendation for Dhaka and Chittagong where TDS regularly exceeds 800 ppm.

  • Purification stages β€” 7 (Sediment β†’ Pre-Carbon β†’ RO β†’ UV β†’ UF β†’ TDS Controller β†’ Post-Carbon)
  • TDS range β€” 500–2000 ppm | Tank β€” 8 litres
  • Annual filter cost β€” ৳3,000–৳4,000 | Price β€” ৳22,000–৳28,000

Why it is strong: The TDS Controller blends a portion of UF-filtered water back, letting you set your preferred mineral level. Kent has the widest service network in Bangladesh β€” authorised centres in all 64 districts.

3. Livpure Glitz Plus β€” Best Mid-Range Value

7-stage RO + UV + UF purification with a copper-charged water option β€” a feature normally found only in premium units.

  • Purification stages β€” 7 (Sediment β†’ Pre-Carbon β†’ RO β†’ UV β†’ UF β†’ Copper Charge β†’ Post-Carbon)
  • TDS range β€” 200–2000 ppm | Tank β€” 7 litres
  • Annual filter cost β€” ৳2,200–৳3,000 | Price β€” ৳15,000–৳19,000

Why it stands out: Filter replacement costs are the lowest on this list. The copper charging stage adds antimicrobial properties at no extra running cost.

4. Pureit Ultima Mineral RO+UV β€” Best for Families

Reliable 7-stage purification with mineral enhancer and 10-litre tank, backed by the Unilever brand network.

  • Purification stages β€” 7 (Sediment β†’ Carbon β†’ RO β†’ Carbon Block β†’ Mineral Enhancer β†’ UV β†’ Micro-filter)
  • TDS range β€” Up to 2000 ppm | Tank β€” 10 litres
  • Annual filter cost β€” ৳3,000–৳3,800 | Price β€” ৳18,000–৳24,000

Why families choose it: Auto-Refill technology and auto shut-off prevent overflow. The pan-Bangladesh Unilever service network gives buyers confidence.

5. Tata Swach Cristella Plus β€” Best Budget Choice

Solid 6-stage RO + UV purification at an accessible price with the lowest annual running costs on this list.

  • Purification stages β€” 6 (Pre-filter β†’ Sediment β†’ Carbon β†’ RO β†’ UV β†’ Post-Carbon)
  • TDS range β€” 200–1500 ppm | Tank β€” 6 litres
  • Annual filter cost β€” ৳1,800–৳2,500 | Price β€” ৳10,000–৳14,000

Quick Comparison Table

ModelStagesTankAnnual CostPrice
A. O. Smith Z8810L৳3,500–৳4,500৳28,000–৳35,000
Kent Grand Plus78L৳3,000–৳4,000৳22,000–৳28,000
Livpure Glitz Plus77L৳2,200–৳3,000৳15,000–৳19,000
Pureit Ultima Mineral710L৳3,000–৳3,800৳18,000–৳24,000
Tata Swach Cristella66L৳1,800–৳2,500৳10,000–৳14,000

What to Do Before You Buy

Measure your tap water TDS before visiting any showroom. If it is below 200 ppm, a UV+UF unit would serve you just as well at lower cost with zero water wastage. If it is above 500 ppm, RO is non-negotiable. Match the purifier to your water β€” not to the showroom promotion.