Replacement Water Filters & Cartridges

Replacement Water Filters & Cartridges keep your water filtration systems performing at their best, delivering cleaner, better-tasting water for drinking, cooking, bathing, and protecting appliances. This directory connects you with cartridges for under-sink systems, whole-house housings, refrigerators, pitchers, inline ice makers, and reverse osmosis stages, so you can match the right filter to your setup and water quality.

Key benefits include improved taste and odor, reduced chlorine and chloramine, lower sediment and rust, and targeted reduction of lead, PFAS, cysts, VOCs, and scale. Options span sediment filters (1–50 micron), carbon block and GAC, RO membranes, ion-exchange resin, and scale-control cartridges.

How to choose:
- Know your housing size: standard 10" x 2.5", 20" x 2.5", or Big Blue 10" x 4.5" and 20" x 4.5".
- Match micron rating to your needs; lower microns capture finer particles but may reduce flow.
- Check certifications such as NSF/ANSI 42, 53, 58, 401, and P473 for verified performance.
- Confirm compatibility by model number, O-ring style, and connection type.
- Select capacity and flow rate appropriate for family size and usage.

Maintenance tips:
- Replace on schedule (every 3–12 months or at rated gallons), sooner for well water or high sediment.
- Use shutoff and pressure relief before opening housings; have a catch pan ready.
- Lubricate O-rings with food-grade silicone and hand-tighten to prevent leaks.
- Flush new carbon filters until water runs clear to remove fines.
- Sanitize housings during annual filter changes to prevent biofilm.

Troubleshooting:
- Low pressure often points to clogged sediment filters; install a staged setup.
- Black specks indicate carbon fines; flush longer.
- Persistent odor may require a catalytic carbon upgrade or pre-oxidation.

Save money with multipacks, track changes with TDS meters or pressure gauges, and recycle spent cartridges where programs exist locally.