Under-sink water filters under $400 right now
Prices checked November 14 at 7:21 PM ET · updates hourly
Budget of $400? Here is every in-stock under-sink water filters item from Waterdrop at or under that price, cheapest first, straight from the store's own feed. Filter systems from Waterdrop. Check your sink's space and the yearly cost of replacement filters before you buy.
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Under $400, lowest price 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 Getting the most for $400
- Check what's included at the lower prices: size, accessories and warranty often change.
- Add shipping and tax before you compare; a cheaper item with costly shipping can end up over budget.
- Confirm the price on the store's page, since prices can change between our hourly checks.
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