
Whole-Home vs. Under-Sink Water Filtration: Which Is Right for Your East Bay Household?
Understanding East Bay Water Quality
Municipal supplies meet safety standards but often carry chloramine, mineral hardness, and earthy Delta flavors. The right filtration system improves taste, protects appliances, and supports family health.
How Each System Works
Whole-Home Filters
Installed at the main supply, they treat every tap—ideal for skin, hair, laundry, and appliance longevity.
Under-Sink Filters & RO Units
Mounted beneath one faucet, they polish drinking and cooking water, offering advanced contaminant removal without house-wide plumbing changes.
Side-by-Side Comparison
FeatureWhole-HomeUnder-Sink (RO/Carbon) CoverageEntire houseSingle tap Installation Cost$$$$ MaintenanceAnnual media swapFilter change 6-12 mo Hardness RemovalYes (with softener)No Lead/PFAS RemovalAdvanced media onlyRO: Yes
Decision Guide
Choose Whole-Home if you want softer water for bathing, longer appliance life, and have budget for a $1,500-$4,000 install.
Choose Under-Sink if you rent, have limited space, or only care about drinking quality.
Installation & Maintenance Tips
- Always size systems to your home’s flow rate to avoid pressure drops.
- Replace carbon media or RO membranes on schedule to prevent bacteria growth.
- Combine systems (whole-home + RO) for ultimate protection.
FAQs
Do filters remove fluoride?
Standard carbon does not—only reverse osmosis or activated alumina media reduce fluoride.
Will a softener make water “slippery”?
Yes; the trade-off is scale-free pipes and spotless glassware.
Next Steps
Good Fit Plumbing offers free water tests and tailored quotes for both systems—contact us to taste the difference.









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