Cheapest under-sink water filters right now
Prices checked November 15 at 5:47 AM ET · updates hourly
Shopping on a budget? Here are in-stock under-sink water filters from Waterdrop, sorted from the lowest price up. Prices come straight from the store's own feed, so this list changes as prices do. Filter systems from Waterdrop. Check your sink's space and the yearly cost of replacement filters before you buy.
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Budget picks: lowest prices first
Under Sink Water Filter Direct Connect Filtration System$58.99at Waterdrop 
Undersink Water Filtration System With Dedicated Faucet$69.99at Waterdrop 
Stainless Steel Under Sink Water Filter Direct Connect Filtration System$75.99at Waterdrop 5+1 Stage Stainless Steel Direct Connect Under Sink Water Filter AS13$78.99at Waterdrop 
Under Sink Ultrafiltration Water Filter Direct Connect Filtration System$79.99at Waterdrop 
Waterdrop DST Stainless Steel Under Sink Water Filter System$129.99at Waterdrop 
3-stage Under Counter Direct Connect Filtration System Waterdrop TSA$139.99at Waterdrop 
3-stage Ultra Filtration Under Sink Water Filter System Waterdrop TSA-UF$149.99at Waterdrop 
3-stage Under Sink Water Filter with Dedicated Faucet Waterdrop TSB-ALK$149.99at Waterdrop 
3-stage Under Counter Water Filter System with Dedicated Faucet Waterdrop TSB$149.99at Waterdrop 
Ultrafiltration Under Sink Water Filter System Waterdrop TSU-W$189.99at Waterdrop 
6-stage Under Sink Ultrafiltration Stainless Steel Water Filter System Waterdrop TST-UF$189.99at Waterdrop 
Waterdrop T3-M 450G Remineralization RO Under the Sink Water Filter$279.99at Waterdrop 
Waterdrop T3-C 450G Reverse Osmosis Water Filters for the Sink$279.99at Waterdrop 
Ultrafiltration Under Sink Water Filter System Waterdrop TSU-W With 2 Year Package$316.95at Waterdrop 
Waterdrop T4-A 450GPD Alkaline Dual Flow Reverse Osmosis System$329.99at Waterdrop 
Waterdrop Reverse Osmosis Hot Cold Water Dispenser, A1$649at Waterdrop 
Waterdrop X Series Alkaline Reverse Osmosis System, X8-A$799at Waterdrop 
Waterdrop X Series Dual Flow Reverse Osmosis System, X8-PRO$899at Waterdrop 
800 GPD Tankless Reverse Osmosis System - Waterdrop G3P800$999at Waterdrop 
Waterdrop X Series Reverse Osmosis System, X12-Bronze$1,299at Waterdrop 
Waterdrop X Series Reverse Osmosis System, X12$1,299at Waterdrop Waterdrop X Series Reverse Osmosis System, X12-Gold$1,299at Waterdrop 
Waterdrop X Series Reverse Osmosis System, X16-Gold$1,999at Waterdrop Before you buy the cheapest one
- Compare what's included. The lowest price can leave out accessories, a larger size or a longer warranty.
- Check the price on the store's page. Prices and stock can change between our hourly updates.
- Look at shipping and returns. A cheap item with costly shipping or no returns isn't a bargain.
- Measure or check fit. Size, compatibility and space matter more than a few dollars.
Want to compare more sellers? See under-sink water filters on eBay, lowest price first ↗
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