Whole House Water Filter Installation
Placement on the main line, clearance and support requirements, sizing to peak flow, the bypass loop, and the conditions that make the job a licensed plumber's work.
POINT OF ENTRY
Where the filter goes decides what it does
A whole house filter treats water once, at the point where the supply line enters the building. Everything upstream of it stays untreated.
Water meter
Pressure regulator
Main shutoff
FILTER
Water heater
Branch lines
Order on the main line. The filter sits after the shutoff and ahead of the water heater.
Three decisions determine whether a point-of-entry system does what you bought it for: where it sits on the line, whether it matches your home's flow rate, and whether the space can physically accommodate it. None of them are fixable after installation.
This site covers those decisions, and the specifications that separate one system from another.
Start here
The Six Types of Home Water Treatment
What sediment, carbon, catalytic carbon, ion exchange, reverse osmosis and UV each remove — and what each one leaves untouched.
How this site handles specifications
We work from manufacturer spec sheets and published certification records. Where a figure is not publicly documented, the site says so rather than estimating.
We do not test systems in a home. Nothing here is presented as a hands-on result.