What Is a Water Pressure Regulator?
Quick answer
The valve that steps street water pressure down to something your pipes can live with.
The bell-shaped valve near a home's main water shutoff that reduces street water pressure to a safe household level, typically 40–60 psi. A failing regulator shows up as suddenly weak (or suddenly harsh) pressure at every fixture in the house at once.
Fixes that use this
Bathroom
Low Shower Water Pressure? Fix It in One Evening
Weak shower pressure is usually a mineral-clogged head, not your pipes. Soak it in vinegar, check the inlet screen, and know when it's something bigger.
Time20 min active + 1–2 hr soak Cost$2–$25 moderate