Why One Faucet Has Low Water Pressure and How to Fix It
Direct answer: When only a single faucet shows weak flow, the problem is almost always a clogged aerator, a partially closed shut‑off valve, a worn cartridge, or a kinked supply line. Start by checking the aerator – it resolves 60‑70% of cases – and then move through the other items in order of likelihood. Confirm the Issue Is Isolated Before you begin any disassembly, verify that the low pressure is limited to one fixture: Turn on the faucet and note the flow of both hot and cold water. Open a nearby faucet (sink, shower, or tub) and compare the pressure. If other fixtures work normally, you can focus on the single faucet. If several fixtures are weak, the cause is likely a house‑wide issue such as a pressure‑reducing valve (PRV) or a municipal supply dip. Common Causes (Ordered by Likelihood) Clogged Aerator (Most Frequent) The aerator is the fine mesh screen at the tip of the faucet. Mineral deposits, sand, or debris can block it, reducing flow dramatically. Par...