The answer to 'drain low water pressure' is that there are several common causes, including mineral buildup, leaks, or problems with the water main. Symptoms include low flow from faucets and showerheads, and the water may sputter or feel weak. Solutions can range from simple DIY fixes to professional plumbing services, depending on the root cause.
If the low pressure is isolated to one fixture, the issue is likely a clogged aerator or showerhead that can be cleaned or replaced. More widespread low pressure throughout the home may indicate a larger problem like a leak in the main water line, mineral buildup in the pipes, or an issue with the water meter or main shutoff valve. These require a professional plumber to diagnose and repair.