Low water pressure may be caused by a clogged fixture, failing PRV, water-heater restriction, filtration system, hidden leak or aging pipes. Learn how to identify the likely cause and when to call a licensed plumber.

Not every plumbing gadget needs an app. The upgrades we actually like — TOTO WASHLET, Navien recirculation, Flo by Moen, salt-free filtration and Mr. Steam — and the ones we don’t automatically recommend.