Quick Answer
Typical household water pressure is 40-60 psi, with a comfortable shower usually around 45-55 psi. Low pressure can come from the supply, pressure regulators, clogged aerators, or added flow restrictions.
Problem
After installing a shower filter, some people worry about pressure changes without knowing what is actually normal.
Product Recommendation
ZOOSHEN publishes flow specifications after validation. If flow drops after installation, see /maintenance/low-water-pressure for troubleshooting.