MaxCap® DI Cartridge 20"
SKU 14-0056Or 4 interest-free payments — see options at checkout.
- Founded 1985
- Built in Tempe AZ
- In-house membranes
- Lifetime support
MaxCap in the 20" form factor — for setups using 20" filter housings (bigger systems, longer cartridge intervals). Same sacrificial roughing role as the 10" MaxCap, double the resin volume.
What it does
Sits ahead of a mixed-bed or SilicaBuster polishing cartridge, takes the brunt of incoming TDS, and extends polishing cartridge life 4× or more. Also captures ammonia from chloramine-treated feeds.
Features
- 3.5× the capacity of conventional mixed-bed and high-silica cartridges
- Extends downstream DI cartridge life 4× or more
- Removes ammonia from chloramine-treated water
- Designed to run in front of a mixed-bed or SilicaBuster cartridge
- Twist-top refillable shell
- Aluminized Mylar packaging
- Drop-in fit for SpectraPure systems and most aquarium and residential DI/RO-DI systems (Captive Purity, Kent Marine, AWI, BRS, and similar).
Specs
- Form factor: 20" twist-top (2.8" D × 20" L)
- Role: roughing/sacrificial DI before polishing stage
Related products
- 10" version: MaxCap DI 10"
- Polishing stages that pair with MaxCap 20": Mixed Bed DI 20" · SilicaBuster DI 20"
- Browse all DI cartridges
Questions about filters, production rates, or membranes? Visit our Know Your Filters page or contact us.
Note: DI water is not intended for drinking. DI resin is not made from food-grade material. Some resins have a strong odor — handle in well-ventilated areas.
Cleaner water for plants, pets, and people
Reverse osmosis membranes reject microplastics, PFAS and "forever chemicals," chlorine and chloramine byproducts, heavy metals, and the dissolved solids that show up as taste and scale. That means cleaner feed water for your plants, animals, business, or family — and a lot less reliance on bottled water, which keeps plastic out of the landfill. Most setups run a 3:1 waste-to-product ratio on hard water and 2:1 on soft water, and can be tuned to 1:1 in high-purity feed areas or with a periodic pure-water flush. The system is built to last with field-serviceable filter housings, so you replace cartridges (not whole units) for years of dependable purity.