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Original price was: $169.00.$119.00Current price is: $119.00.
4 Years Supply (24 pcs) for 3 Stage Whole House Filtration System or Reverse Osmosis RO. Replacement Set of 3 filters: Sediment, GAC, CTO Carbon Block
Eight complete 3-stage refills in one box — sediment, GAC, and carbon block, twenty-four cartridges total. A multi-year supply for a 3-stage whole-house or under-sink RO system, at about $14.90 per set.
24 cartridges — 8 complete 3-stage sets (8 of each cartridge below).
This is a bulk refill for a 3-stage slim 10″×2.5″ system — eight complete sets in one box. It works two ways: as the full filter set for a 3-stage whole-house system, or as the pre-filter set for an under-sink reverse-osmosis system (sediment + carbon before the RO membrane). Each set is three matched stages: sediment catches the grit, GAC handles bulk chlorine, taste, odor, and VOCs at high flow, and the carbon block gives a final fine polish.
How long does eight sets last? At our recommended 6-month change interval, eight sets is a genuine 4-year supply — and if you stretch changes toward 12 months on cleaner water, it goes further, up to about 8 years. Your water quality and usage set the pace.
The value is in buying ahead: at $119 for eight sets, that’s about $14.90 per set versus buying them singly. All cartridges fit standard 10″ × 2.5″ housings — the size used in most 3-stage whole-house and under-sink RO systems with a 3/4″ port.
What this set targets — and what it isn’t built for.
Whole house or RO pre-filter — same set. These three stages are the standard sediment-and-carbon line-up used both in 3-stage whole-house systems and ahead of an under-sink RO membrane. If you run RO, this refills the pre-filters (the membrane itself is separate).
Install in flow order. Sediment first (inlet side), GAC second, carbon block third. Out of order, the carbon stages clog with grit and wear out early.
On chloramine? This isn’t the set. Standard GAC and carbon block reduce chlorine well but not chloramine — that needs catalytic carbon. If your city uses chloramine (its annual water report will say), swap the GAC stage for a catalytic cartridge.
Store spares sealed, cool and dry. Keep unused cartridges in their wrap until it’s their turn — carbon especially keeps best unopened.
Flush on each change. Run water to drain a few minutes after installing new carbon — it releases harmless fines at first, GAC especially.
| Weight | 21 lbs |
|---|---|
| Dimensions | 14 × 14 × 11 in |
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