iSpring FC15B
iSpring FC15B High Capacity Activated CTO Carbon Block Filter Instruction Manual
Model: FC15B
1. Úvod
The iSpring FC15B is a high-capacity activated CTO (Chlorine, Taste, and Odor) carbon block filter designed for use in under-sink and whole-house water filtration systems. This filter effectively reduces free chlorine, unpleasant tastes, odors, THMs, organic compounds, and other hazardous chemicals from your water supply. It is constructed from high-quality coconut shell carbon using compact fabrication technology to ensure maximum filtration efficiency and extended filter life.
This manual provides essential information for the proper installation, operation, and maintenance of your FC15B filter to ensure optimal performance and longevity.
2. Bezpečnostní informace
- Před instalací nebo servisem filtru vždy uzavřete hlavní přívod vody.
- Release any residual water pressure in the system before opening filter housings.
- Wear appropriate personal protective equipment, such as safety glasses and gloves, during installation and maintenance.
- Do not overtighten fittings or filter housings, as this can cause cracks or leaks.
- Ensure all connections are secure and leak-free before restoring water pressure.
- Keep the filter and its components away from direct sunlight and extreme temperatures.
3. Vlastnosti produktu
- Prémiový materiál: Made with high-quality coconut shell carbon and compact fabrication technology for maximum filtration efficiency. Free of surfactants, binders, and adhesives.
- Exceptional Filtration Performance: Reduces up to 99% of chlorine, bad tastes, odors, cloudiness, and is effective against organic compounds like herbicides, industrial solvents, and trihalomethanes.
- Dlouhá životnost filtru: Filters up to 50,000 gallons or lasts approximately 6 months, depending on water quality and usage.
- Skvělá kompatibilita: Official replacement filter for iSpring Under Sink Water Filter System US21B and Whole House water filtration systems (WGB21B, WGB21BM, and WGB21B-PB). Fits other standard 10" x 4.5" undersink and whole house water filtration systems.
- Individually Sealed: Each filter is individually sealed to maintain freshness and ensure product integrity.
4. Obsah balení
The iSpring FC15B filter package includes:
- 1 x iSpring FC15B High Capacity Activated CTO Carbon Block Filter

Image 1: iSpring FC15B CTO Carbon Block Filter
5. Kompatibilita
The FC15B filter is designed for broad compatibility with various iSpring and other standard filtration systems. It is specifically recommended as the second stage filter for:
- iSpring Direct Connect under sink water filter system US21B
- iSpring whole house filtration system WGB21B
- iSpring whole house filtration systems WGB21BM
- iSpring whole house filtration systems WGB21B-PB
It also fits other standard 10" x 4.5" undersink and whole house water filtration systems.

Image 2: iSpring FC15B Filter Compatibility Overview
6. Nastavení a instalace
This section outlines the general steps for installing a whole house water filtration system, which includes the FC15B filter. For detailed instructions specific to your system model, please refer to your system's user manual.
6.1. Příprava
- Sbírejte nástroje: Ensure you have all necessary tools, including a pipe cutter, adjustable wrench, plumber's tape (thread seal tape), and a bucket.
- Uzavření přívodu vody: Locate and shut off the main water supply to your house.
- Odtokové vodovodní potrubí: Open the nearest faucet to drain water from the pipes and release any pressure.
- Prepare Fittings: Apply plumber's tape to the threads of any fittings in a clockwise direction. Do not overtighten when securing them to the system's inlet and outlet ports.
6.2. Filter Insertion
- Unwrap the FC15B carbon block filter from its protective packaging.
- Ensure the filter's center hole slips over the center knob at the bottom of the housing.
- Verify that the housing O-rings are properly seated to prevent leaks.
- Hand-tighten the housing counter-clockwise onto the housing cap.
- Using a housing wrench, tighten the housing an additional quarter to half a turn. Neutahujte příliš, as this can cause cracks or make future replacements difficult.
6.3. System Installation (General Whole House System)
The following video demonstrates the installation process for iSpring Whole House Water Filtration Systems. The FC15B filter is a component within these systems.
Video 1: iSpring Whole House Water Filtration System Installation Guide. This video demonstrates the general installation process for iSpring whole house systems, including preparation, mounting, and connecting to the pipeline. It also covers initial flushing and leak checks.
- Mount the System: Find a suitable location for the system and mount the bracket securely on the wall.
- Connect to Pipeline: Measure and cut the water inlet pipe. Connect the filtration system to your main water line, ensuring the water flow direction arrow on the machine head matches the direction of water flow within the pipeline.
- Obnovení zásobování vodou: Pomalu zapněte hlavní přívod vody.
- Zkontrolujte netěsnosti: Carefully inspect all connections for any leaks.
- Propláchněte systém: Let the water run from a nearby faucet for approximately 10 minutes to flush out any debris or loose filter media. Turn off the faucet when the water runs clear.
7. Návod k obsluze
Once installed and flushed, your iSpring FC15B filter operates continuously as part of your water filtration system. No special operational steps are required beyond ensuring proper installation and regular maintenance.
- The filter provides clean, filtered water to all connected outlets in your home (for whole house systems) or to your designated faucet (for under-sink systems).
- Monitor water flow and quality. A noticeable drop in water pressure or a return of unpleasant tastes/odors indicates that the filter may need replacement.
8. Údržba a výměna filtru
Regular maintenance and timely filter replacement are crucial for the optimal performance and longevity of your iSpring filtration system.
8.1. Harmonogram výměny filtru
The FC15B filter should be replaced every 6 months or after filtering approximately 50,000 gallons of water, whichever comes first. Actual filter life may vary based on your source water quality and usage.

Image 3: FC15B Filter Capacity (50,000 Gallons)
8.2. Postup výměny
The following video demonstrates the maintenance and filter replacement process for iSpring Whole House Water Filtration Systems. The FC15B filter is replaced using these general steps.
Video 2: iSpring Whole House Water Filtration System Maintenance and Filter Replacement. This video guides through bypassing the system, releasing pressure, unscrewing housings, cleaning, replacing filters, and restoring service.
- Bypass System: Shut off the main water supply and bypass the filtration system (if a bypass valve is installed).
- Uvolňovací tlak: Open a nearby faucet to release pressure. If applicable, use the pressure release button on the filter housing.
- Unscrew Housings: Place a bucket underneath the filter housings to catch any water. Unscrew the filter housing clockwise using the included housing wrench.
- Odstraňte starý filtr: Remove and dispose of the expired FC15B filter cartridge.
- Čisté pouzdra: Wearing rubber gloves and safety goggles, clean the inside of the housing and the housing cap with lukewarm water mixed with two tablespoons of household bleach, using a sponge or soft cloth. Rinse thoroughly.
- Instalace nového filtru: Insert the new FC15B filter into the housing, ensuring it seats correctly over the center knob. Apply lubricant to the O-rings and ensure they are properly seated.
- Reinstall Housings: Hand-tighten the housing counter-clockwise onto the housing cap, then tighten an additional quarter to half a turn with the wrench. Neutahujte příliš.
- Obnovení zásobování vodou: Slowly turn on the main water supply and return the system to service.
- Splachovací systém: Let water run from a nearby faucet for about 10 minutes to flush out any air and carbon fines.
9. Řešení problémů
| Problém | Možná příčina | Řešení |
|---|---|---|
| Únik vody | Loose connections, damaged O-rings, overtightened housing. | Check all connections and tighten if necessary. Inspect O-rings for damage and replace if needed. Ensure housings are tightened correctly, not excessively. |
| Nízký tlak vody | Clogged filter, air in the system, partially closed shut-off valve. | Replace the filter if it's past its service life. Flush the system to remove air. Ensure all valves are fully open. |
| Bad Taste/Odor Returns | Expired filter, high contaminant levels. | Replace the FC15B filter. If the problem persists, consider additional filtration stages or consult iSpring support. |
| Cloudy Water After Filter Change | Jemné uhlíkové částice z nového filtru. | Flush the system for an extended period (10-15 minutes) until water runs clear. This is normal for new carbon filters. |
10. Specifikace
| Atribut | Detail |
|---|---|
| Značka | iSpring |
| Název modelu | FC15B High Capacity Activated CTO Carbon Block Water Filter |
| Číslo dílu | FC15B |
| Materiál | Uhlíkový blok |
| Velikost filtru | 10" x 4.5" |
| Hodnocení společnosti Micron | 5-Micron |
| Kapacita | 50,000 galonů |
| Doporučená výměna | Každých 6 měsíců nebo 50,000 galonů |
| Hmotnost položky | 2.7 libry |
| Rozměry produktu | 4.5 x 4.5 x 10 palce |
| Typ instalace | Under Sink / Whole House |
| Metoda čištění | Activated Carbon, Carbon Block |

Image 4: iSpring FC15B Filter Dimensions (10 inches tall)
11. Záruka a podpora
11.1. Informace o záruce
Your iSpring FC15B filter is backed by a 30-day money-back guarantee. For specific warranty details regarding your complete iSpring filtration system, please refer to the documentation provided with your system.
11.2. Zákaznická podpora
iSpring offers lifetime technical support from their team in Alpharetta, GA. If you encounter any issues or have questions regarding your FC15B filter or iSpring filtration system, please contact customer support.

Image 5: iSpring Customer Support Process
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