Replacing an under sink water filter is one of the most important steps you can take to ensure your household enjoys consistently clean, great-tasting, and healthy water. A reliable under sink filter not only removes harmful contaminants but also enriches your water with beneficial minerals, supporting your well-being every time you turn on the tap. If you are looking for a simple, step-by-step under sink filter replacement guide, you are in the right place.
Why Regular Under Sink Filter Replacement Matters
An under sink water filtration system is a silent hero in many homes, working daily to remove chlorine, chloramines, volatile organic compounds (VOCs), and other unwanted substances from your drinking water. Over time, the filter media becomes saturated and less effective. Replacing your under sink filter according to manufacturer recommendations helps maintain peak filtration performance and water quality.
When Should You Replace Your Under Sink Filter?
Most under sink filters, especially advanced multi-stage systems, should be replaced every 12 months. However, the actual timeline may vary based on water quality, usage, and filter type. If you notice a change in water taste, a decrease in flow, or see cloudiness, these are clear signs it's time to follow your under sink filter replacement guide.
Preparing for Your Under Sink Filter Replacement
- Replacement filters specific to your system
- Filter housing wrench (often included with your system)
- A towel or small container to catch any water drips
- Clean hands to avoid contaminating new filters
Having everything ready before you begin your under sink filter replacement ensures a quick and hassle-free experience.
Step-by-Step Under Sink Filter Replacement Guide
- Shut Off the Water Supply: Locate the cold water shut-off valve under your sink. Turn it clockwise to stop the water flow. If your system is connected to a fridge, shut off the corresponding valve there instead.
- Release Pressure & Prepare: Turn on the cold water tap to relieve any remaining pressure. Place a container or towel under the filtration system to catch water.
- Remove Filter Housings: Use the provided wrench to gently unscrew the housing for Filter 1. Remove the used filter and discard according to local recycling guidelines.
- Insert the New Filter: Take the replacement filter out of its sealed bag. Place it into the housing, ensuring it is seated properly. Screw the housing back onto the system by hand for a snug fit.
- Repeat for Additional Filters: If your under sink filter system has more than one stage, repeat for each filter (such as a second Trappsorb or mineral enrichment cartridge).
- Turn Water Back On: Slowly turn the water valve counterclockwise while keeping the faucet open. Allow water to flow and check for leaks around the housing gaskets.
- Purge the System: Let the cold water run for 5–10 minutes to flush out any air bubbles and new filter media. If the water appears cloudy, continue purging until it runs clear.
Troubleshooting Common Issues
After following this under sink filter replacement guide, inspect your system for leaks around the housing or tubing connections. If you notice a drip, turn off the water, unscrew the housing, ensure the O-ring is seated correctly, and retighten. Reduced water flow afterward can be normal as the new filter media settles; it should resolve within a week.
Tips to Extend the Life of Your Under Sink Filter
- Replace filters annually—or sooner if your water has high sediment or heavy use
- Wipe down the filter housing and connections during each replacement to prevent mold or buildup
- Keep a reminder or subscribe for automatic filter deliveries to ensure timely replacements
- Only use certified replacement filters designed for your specific system for best results and warranty protection
Healthy Water, Happy Home
Sticking to a yearly under sink filter replacement schedule keeps your water tasting crisp, safe, and healthy for your family. The Sentry Wellness System is designed for easy DIY filter changes, with minimal tools required and no need for a plumber. Our innovative system also ensures your water is not just toxin-free but enriched with essential minerals for better health. If you have questions about filter replacement or want to learn about our advanced under-sink solutions, explore our Sentry Wellness System or check out our FAQ for more details.
Clean water is an investment in your well-being. Make under sink filter replacement a part of your regular home care routine and enjoy every glass with peace of mind.