Filter Pressure
Filter pressure is the water pressure reading on the filter pressure gauge, measured in psi (pounds per square inch).
Definition
Filter pressure is the water pressure reading on the filter pressure gauge, measured in psi (pounds per square inch).
Typical Values: Baseline: varies by system; Clean threshold: baseline + 0–4 psi; Cleaning needed: baseline + 8–10 psi
In Plain Language
When a filter is clean, it has a baseline pressure. As the filter captures particles and becomes partially clogged, pressure rises. The standard cleaning threshold is 8–10 psi above the clean baseline. An abnormally low pressure can indicate a pump problem or a disconnected filter. An abnormally high pressure indicates a clogged or partially blocked filter.
Why It Matters
Filter pressure is the primary indicator of when the filter needs cleaning. Running a clogged filter reduces water flow and filtration efficiency.
Typical Values
Baseline: varies by system; Clean threshold: baseline + 0–4 psi; Cleaning needed: baseline + 8–10 psi
Last reviewed: 2026-06-01