Best Water Purifier Under $400

As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.

Be realistic about what ₹6,000 buys: RO purifiers with a pump start above ₹8,000–10,000 in today’s market. Under ₹6,000 you’re mostly choosing between non-electric gravity/UF purifiers (no power needed, best for low-TDS municipal water) and a couple of budget electric RO+UV+UF units. If your water source is borewell or high-TDS, none of the picks below substitute for a proper RO system — they’re built for municipal-supply water with visible dirt and bacteria, not high dissolved solids.

Pick 01 of 07

HUL Pureit Classic 23L Gravity Water Purifier

No electricity, no plumbing — just fill and filter, from India’s most recognised purifier brand.

• 23L gravity-based, non-electric
• Germkill Life Indicator
• Activated carbon trap

Pros

• Works during power cuts
• Trusted brand with wide service/cartridge availability

Cons

• No UV/UF electronic sterilisation — suitable for low-TDS municipal water only

Price: ₹3,450–₹4,100

Check price on Amazon

Pick 02 of 07

KENT Gold Plus 20L Gravity UF Water Purifier

Kent’s non-electric UF purifier, using a hollow-fibre membrane that filters bacteria and cysts without chemicals.

• 20L storage (7L top + 13L bottom)
• UF membrane, non-electric
• Chemical-free purification

Pros

• UF membrane is a genuine step up from basic carbon filtration
• No running cost — no electricity

Cons

• UF alone won’t remove dissolved salts — not for high-TDS water

Price: ₹2,879–₹3,200

Check price on Amazon

Pick 03 of 07

KENT Gold Optima 10L Gravity UF Water Purifier

A compact countertop version of Kent’s UF gravity purifier, for smaller kitchens.

• 10L storage (5L top + 5L bottom)
• UF membrane, non-electric
• Countertop design

Pros

• Smallest footprint in this list
• Cheapest way into UF-grade filtration

Cons

• Smaller storage means more frequent refills for larger families

Price: ₹1,650–₹2,200

Check price on Amazon

Pick 04 of 07

Eureka Forbes Aquasure Amrit 20L Gravity Water Purifier

Eureka Forbes’ budget gravity purifier using positively-charged nano-fibre technology to trap bacteria and viruses.

• 20L capacity, non-electric
• Positive Charge Technology nano-fibre
• Food-grade plastic body

Pros

• Cheapest option in this entire list
• Eureka Forbes brand backing and cartridge availability

Cons

• Most basic filtration tier here — fine for clear municipal water, not for visibly turbid or high-TDS supply

Price: ₹1,950–₹2,500

Check price on Amazon

Pick 05 of 07

Tata Swach Smart 15L Gravity Water Purifier

Tata’s entry gravity purifier, the lowest-priced purifier of any kind in this list.

• 15L capacity, non-electric
• Bulb-based germ-kill technology

Pros

• Lowest price of any purifier here
• Trusted Tata brand name

Cons

• Smallest storage capacity of the gravity purifiers listed

Price: ₹1,300–₹1,600

Check price on Amazon

Pick 06 of 07

Kinsco Aqua Flame 15L Copper + RO + UV + UF Water Purifier

The most fully-featured electric purifier that still fits this budget, combining RO with copper infusion.

• 15L capacity, electric
• RO + UV + UF + copper + TDS adjuster
• Pre-filter included

Pros

• Only genuine RO option in this list — handles higher-TDS water
• Copper infusion and TDS control are unusual at this price

Cons

• Lesser-known brand — verify service/cartridge availability in your city before buying

Price: ₹3,999–₹4,800

Check price on Amazon

Pick 07 of 07

Kinsco Aqua Punch+ 15L RO + UV + UF Water Purifier

A close sibling to the Aqua Flame with zinc and alkaline enhancement, at the top of this budget.

• 15L capacity, electric
• RO + UV + UF
• Zinc, copper and alkaline (ORP) enhancement
• pH enhancer

Pros

• Adds alkaline/pH enhancement most budget purifiers skip
• Still an RO system for higher-TDS water

Cons

• Right at the top of the ₹6,000 cap and the priciest option here

Price: ₹4,800–₹6,000

Check price on Amazon

Buying tips

• First, check your water source: if it’s municipal supply with visible clarity, a gravity UF purifier is enough. If it’s borewell or tanker-fed with a bitter/salty taste, only the RO options here (Kinsco) will actually help — and even those are budget RO units, not full-size systems.
• Non-electric gravity purifiers (Pureit Classic, Kent Gold, Eureka Forbes Amrit, Tata Swach) need zero running cost and work during power cuts — the trade-off is no TDS reduction.
• Ask your local dealer to test your water’s TDS level (many will do this for free) before choosing between gravity/UF and RO.
• Replacement cartridges are a recurring cost on every purifier here — budget ₹500–1,500 a year regardless of which one you pick.

As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.