Building plumbing
Public system records stop before your walls. Some people look at filters when a building is older — this page is education only.
Building path
pipes & fixtures
Point of use
often carbon / RO
Not a pipe repair
tests beat guesswork
First things first
- Ask your city about service-line records or programs for your address.
- If you want certainty about your tap, have it tested — filters are not a substitute for knowing what is in the glass.
Where filters fit (education only)
- Some certified carbon units claim specific reductions (read the claim, not the marketing).
- Reverse osmosis is a broader one-tap option with trade-offs (waste water, upkeep).
No products recommended. A clean public system file still does not certify your building’s pipes.