Empty Refillable Cartridge 20"x 2.5" White
Empty Refillable Cartridge 20"x 2.5" White
A reusable 20-inch filter shell you fill with any media you need. Built for standard housings, designed for flexibility.
Custom filtration on your terms
The Watts RC-W-20 is an empty polypropylene cartridge that lets you load your own filter media. Whether you need activated carbon, KDF, calcite, specialized resins, or blended media, this 20-inch shell gives you control over what goes into your water. Standard 2.5-inch diameter fits any compatible 20-inch housing.
Built for flexibility and repeat use
Reusable Design
Open both ends, rinse, refill. Use the same cartridge body dozens of times with fresh media.
Any Media You Need
GAC, catalytic carbon, KDF, ion exchange resins, remineralization blends. Your choice.
Standard Fit
Fits all standard 20-inch x 2.5-inch housings. Same dimensions as industry-standard cartridges.
Durable Construction
Polypropylene body resists cracking and holds up to repeated refills and cleaning cycles.
Fits standard 20-inch housings
This cartridge works in any filter housing designed for 20-inch x 2.5-inch cartridges, including Watts, Pentek, Culligan, GE, Hydronix, and other manufacturers using the industry-standard Big Blue or slim-line 20-inch format. Confirm your housing interior dimensions before ordering.
Refill when performance drops
Typical Media Lifespan
Replace or recharge the filter media inside based on water quality and flow rate. The cartridge shell itself can be reused indefinitely.
Clean and Refill
Rinse cartridge interior with warm water between refills. Inspect end caps and threads for wear before reassembly.
Cost Effective
Buy media in bulk and refill yourself instead of replacing entire cartridges every cycle.
Custom Blends
Layer different media types or create custom blends for specific contaminants in your water.
Less Waste
Reuse the shell, replace only the media. Reduce landfill contributions from disposable cartridges.
Empty Refillable Cartridge 20"x 2.5" White
A reusable 20-inch filter shell you fill with any media you need. Built for standard housings, designed for flexibility.
Custom filtration on your terms
The Watts RC-W-20 is an empty polypropylene cartridge that lets you load your own filter media. Whether you need activated carbon, KDF, calcite, specialized resins, or blended media, this 20-inch shell gives you control over what goes into your water. Standard 2.5-inch diameter fits any compatible 20-inch housing.
Built for flexibility and repeat use
Reusable Design
Open both ends, rinse, refill. Use the same cartridge body dozens of times with fresh media.
Any Media You Need
GAC, catalytic carbon, KDF, ion exchange resins, remineralization blends. Your choice.
Standard Fit
Fits all standard 20-inch x 2.5-inch housings. Same dimensions as industry-standard cartridges.
Durable Construction
Polypropylene body resists cracking and holds up to repeated refills and cleaning cycles.
Fits standard 20-inch housings
This cartridge works in any filter housing designed for 20-inch x 2.5-inch cartridges, including Watts, Pentek, Culligan, GE, Hydronix, and other manufacturers using the industry-standard Big Blue or slim-line 20-inch format. Confirm your housing interior dimensions before ordering.
Refill when performance drops
Typical Media Lifespan
Replace or recharge the filter media inside based on water quality and flow rate. The cartridge shell itself can be reused indefinitely.
Clean and Refill
Rinse cartridge interior with warm water between refills. Inspect end caps and threads for wear before reassembly.
Cost Effective
Buy media in bulk and refill yourself instead of replacing entire cartridges every cycle.
Custom Blends
Layer different media types or create custom blends for specific contaminants in your water.
Less Waste
Reuse the shell, replace only the media. Reduce landfill contributions from disposable cartridges.
Original: $23.66
-65%$23.66
$8.28Description
Empty Refillable Cartridge 20"x 2.5" White
A reusable 20-inch filter shell you fill with any media you need. Built for standard housings, designed for flexibility.
Custom filtration on your terms
The Watts RC-W-20 is an empty polypropylene cartridge that lets you load your own filter media. Whether you need activated carbon, KDF, calcite, specialized resins, or blended media, this 20-inch shell gives you control over what goes into your water. Standard 2.5-inch diameter fits any compatible 20-inch housing.
Built for flexibility and repeat use
Reusable Design
Open both ends, rinse, refill. Use the same cartridge body dozens of times with fresh media.
Any Media You Need
GAC, catalytic carbon, KDF, ion exchange resins, remineralization blends. Your choice.
Standard Fit
Fits all standard 20-inch x 2.5-inch housings. Same dimensions as industry-standard cartridges.
Durable Construction
Polypropylene body resists cracking and holds up to repeated refills and cleaning cycles.
Fits standard 20-inch housings
This cartridge works in any filter housing designed for 20-inch x 2.5-inch cartridges, including Watts, Pentek, Culligan, GE, Hydronix, and other manufacturers using the industry-standard Big Blue or slim-line 20-inch format. Confirm your housing interior dimensions before ordering.
Refill when performance drops
Typical Media Lifespan
Replace or recharge the filter media inside based on water quality and flow rate. The cartridge shell itself can be reused indefinitely.
Clean and Refill
Rinse cartridge interior with warm water between refills. Inspect end caps and threads for wear before reassembly.
Cost Effective
Buy media in bulk and refill yourself instead of replacing entire cartridges every cycle.
Custom Blends
Layer different media types or create custom blends for specific contaminants in your water.
Less Waste
Reuse the shell, replace only the media. Reduce landfill contributions from disposable cartridges.
