Hard water leaves its mark in the smallest water passages
Leander’s hard water leaves mineral scale where water repeatedly passes through narrow openings. Aerators, shower parts, valves, water-heater connections, and other small passages gradually collect buildup, reducing the water that gets through even when the larger plumbing system is still delivering normal pressure.
That distinction matters when water feels weak. A clogged aerator or scaled shower component creates low flow at that one outlet; it does not automatically show that the whole house has a pressure problem. We check where the loss begins so attention stays on the fixture or branch line when that is where the restriction is.
Mineral buildup is only one possible part of the picture. Weak pressure throughout the house can come from a restriction in the distribution path, a leaking service line, a valve that is not fully open, or a pressure-regulating component that is no longer passing water properly. Pressure that changes when several fixtures run also needs to be separated from a constant, whole-home pressure issue.