A Black Friday "deal" is often a normal price next to an inflated list price. Here a whole-house water filter only counts as on sale when its checked price is at least 15% below its own typical price over the last 90 days, from our price history. The best-rated models are listed too, since many are good value without a sale. See deals in every category.
On sale now
No whole-house water filter rated 3.8 or higher is 15% or more below its typical price at the last price check (November 2, 2026). Prices are rechecked through the sales; this list updates when one drops. See the recent price changes.
Best buys at their normal price
The top-rated models in each build. A sale on one of these is worth more than a big discount on a weaker model.
Best Whole-House Cartridge Water Filters
- Waterdrop WHF21-PG#1 of 13Full review
A low cost starter system for chlorinated city water in a small home.
Amazon $106.98$106.98-15 gpm- - iSpring WGB21B#2 of 13Full review
A low cost first whole-house filter for city water with chlorine taste. Expect to change filters several times a year.
Amazon $155.99$155.99$0.90 per 1,000 gal15 gpm50,000 gal - Waterdrop WHF3T-PG#3 of 13Full review
A lower priced three stage big blue system for city water. Running cost is hard to judge without a gallon rating.
Amazon $269.99$269.99-15 gpm-
Best Whole-House Tank Water Filters
- A. O. Smith AO-WH-FILTER#1 of 6Full review
A certified, maintenance light tank for a small or medium home on chlorinated city water.
Amazon $399$399$0.67 per 1,000 gal7 gpm600,000 gal - Aquasana Rhino WH-1000#2 of 6Full review
For a household that wants to fit a filter and forget it for a decade on chlorinated city water.
Amazon $999$999$0.95 per 1,000 gal7 gpm1,000,000 gal - iSpring WF150K#3 of 6Full review
A backwashing carbon tank for owners who want a long life system with a long warranty and have a drain nearby.
Amazon $1,673.70$1,673.70---
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.