Stage 01
5-Micron Sediment Filter
Helps capture dirt, sand, silt, visible rust particles and suspended scale debris before water reaches the carbon stages.
10″ x 4.5″ Triple Stage Replacement Filters – Sediment 5 Micron + GAC + Carbon Block CTO, SKU: SGC-10BB
$36.95
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Description
Complete 3-stage Big Blue replacement set
Sediment, GAC and CTO carbon-block cartridges for compatible whole-house systems
This three-cartridge set restores one complete filtration cycle in compatible whole-house systems using standard 10″ × 4.5″ Big Blue housings. Install the filters in order: sediment first, GAC second and CTO carbon block third.
3 filtersOne complete replacement cycle
10″ × 4.5″Big Blue cartridge format
3 stagesSediment + GAC + CTO
3–6 monthsTypical service range
Three-stage filtration
Particle prefiltration followed by two carbon-treatment stages
The three cartridges work together to help capture suspended debris, reduce chlorine-related taste and odor, and provide final carbon polishing.
Stage 02
Granular Activated Carbon
Helps reduce chlorine, unpleasant taste, unpleasant odor and many common organic compounds while supporting practical whole-house flow.
Stage 03
CTO Carbon Block
Provides final carbon polishing to help further reduce chlorine-related taste and odor and capture finer suspended particles.
What is included
One complete Big Blue replacement set
- ✓One 10″ × 4.5″, 5-micron sediment filter cartridge
- ✓One 10″ × 4.5″ GAC granular activated carbon cartridge
- ✓One 10″ × 4.5″ CTO carbon-block cartridge
- ✓Three cartridges total—one full change for a compatible 3-stage system
Reduction guide
What the complete filter set helps reduce
Actual performance depends on source-water chemistry, sediment load, chlorine level, pressure, flow rate and cartridge condition.
Helps reduce
Sediment
Dirt and silt
Sand
Visible rust particles
Suspended scale debris
Chlorine
Unpleasant taste
Unpleasant odor
Many common VOCs
Selected organic compounds
Dirt and silt
Sand
Visible rust particles
Suspended scale debris
Chlorine
Unpleasant taste
Unpleasant odor
Many common VOCs
Selected organic compounds
Actual reduction and service life vary with water quality, household use, flow rate and remaining cartridge capacity.
Not designed to remove without specialty treatment
Hardness minerals
Dissolved iron
Hydrogen sulfide
Fluoride
Chloramine
Bacteria or unsafe water
Dissolved salts / TDS
Dissolved iron
Hydrogen sulfide
Fluoride
Chloramine
Bacteria or unsafe water
Dissolved salts / TDS
Chloramine generally requires catalytic carbon. Hardness usually requires a water softener, and microbiological concerns require appropriate disinfection.
Specifications
Filter size, stage order and service guidance
| Product type | Replacement filter set for compatible 3-stage whole-house systems |
|---|---|
| Number of cartridges | 3 |
| Cartridge format | Standard 10″ × 4.5″ Big Blue |
| Stage sequence | 5-micron sediment → GAC → CTO carbon block |
| Sediment rating | 5 micron nominal |
| GAC stage | Granular activated carbon |
| CTO stage | Carbon block; micron rating not stated on the set page |
| Listed flow rate | Up to approximately 5–10 GPM, depending on system setup |
| Typical service life | Approximately 3–6 months, depending on water quality and use |
| Housing compatibility | Compatible standard 10″ × 4.5″ Big Blue housings |
| SKU | SGC-10BB |
| Listed shipping dimensions | 10 × 10 × 10 in |
| Listed shipping weight | Approximately 100 oz / 6.25 lb |
Replacement procedure
- ✓Shut off the water supply and relieve system pressure before opening the housings
- ✓Install the 5-micron sediment cartridge in the first housing
- ✓Install the GAC cartridge in the second housing
- ✓Install the CTO carbon block in the third housing
- ✓Inspect and clean the housing sumps and O-rings during replacement
- ✓Pressurize slowly, inspect for leaks and flush carbon fines to drain
Before purchase
Good to know
!
Confirm Big Blue sizeThis set fits 10″ × 4.5″ Big Blue housings and does not fit standard 10″ × 2.5″ slim housings.
!
Install in the correct orderSediment must be first, GAC second and the CTO carbon block third.
!
This set is not a water softenerThe included filters do not remove dissolved hardness minerals or prevent all mineral scale.
!
Check whether your city uses chloramineStandard GAC and CTO media are intended primarily for chlorine. Chloramine generally requires catalytic carbon.
!
Service life variesHeavy sediment, high chlorine levels, reduced pressure or high household use may require earlier replacement.
!
Flush before normal useInitial dark water may be caused by harmless carbon fines. Flush to drain until the water runs clear.
This product includes three replacement cartridges only. Filter housings, mounting bracket, housing wrench, valves and plumbing fittings are not included. The set does not significantly reduce TDS and is not intended to make microbiologically unsafe or unknown-quality water safe to drink.
Not sure whether this Big Blue replacement set fits your system?
Send the system model number or a photo of the existing cartridges and housings.
Send the system model number or a photo of the existing cartridges and housings.
Additional information
| Weight | 100 oz |
|---|---|
| Dimensions | 10 × 10 × 10 in |
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