A tank system holds a large bed of carbon media, sometimes with KDF, in a tall tank on the main line, and the media lasts years before it’s replaced. They cost more up front than cartridge systems but need little upkeep. Some have a control valve that backwashes the media on a schedule, which needs a drain and an outlet nearby; others have no valve and simply pass water through.
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.
Full ranking 6
- 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--- - Aquasana Rhino Max Flow with UV#4 of 6Full review
For a large house that needs high flow and wants UV added. Most city homes can skip the UV and pay less.
Amazon $2,246.99$2,246.99$1.30 per 1,000 gal14 gpm1,000,000 gal - LiquaGen FK-CAT 10x54#5 of 6Full review
A cheaper backwashing catalytic carbon tank for a large city home with chloramine. Its claims are not backed by testing or a warranty term.
Amazon $849.99$849.99$0.85 per 1,000 gal12 gpm1,000,000 gal - iSpring WF1054#6 of 6Full review
For city homes with chloramine that want a tank with no drain or power, but its short warranty is a weak point at this price.
Amazon $1,417.99$1,417.99-26 gpm-
