Replace Water Filter Cartridge
Why It Matters
An expired filter stops filtering. Worse, it can release trapped contaminants back into your water, making it less safe than unfiltered.
Quick Guide
- 1
Gather your tools and materials
You'll need: Filter wrench (if whole-house). Materials required: Replacement filter cartridge.
- 2
Perform the replace water filter cartridge
Replace the filter cartridge in your whole-house, under-sink, or refrigerator water filter per manufacturer schedule. Safety note: Turn off water supply before replacing whole-house filters.
- 3
Verify and clean up
Check that the work was completed correctly and clean up your workspace.
Tools & Materials
Tools
- Filter wrench (if whole-house)
Materials
- Replacement filter cartridge
Community Tips
Most cartridge filters require replacement every 6-12 months depending on water quality and household size; however, sediment-heavy areas may need quarterly swaps to prevent pressure drops and bacterial growth. Brands like Aqua Pure ($15-25) and Watts Premier ($20-30) publish flow-rate specifications on packaging—use these to confirm compatibility before purchase.
Never operate the filter system while the cartridge housing is open or partially sealed, as this allows unfiltered water to bypass treatment and contaminants to enter the supply line. Failing to depressurize the system before cartridge removal can cause water spray injuries and damage to the housing threads.
Whole-house filter cartridges (Pentair Pentek ($25-40)) cost significantly less than point-of-use pitcher filters when calculated annually across a household, typically saving $100-200 per year while providing superior sediment and chlorine removal for all fixtures simultaneously. ---