The answer to 'how to maintain water line' is to regularly inspect, clean, and protect your home's water lines. This includes checking for leaks, clearing debris, and insulating exposed pipes to prevent freezing.
Start by visually inspecting your water lines, both inside and outside your home, for any signs of damage or leaks. Look for cracks, corrosion, or wet spots that could indicate a problem. If you find any issues, address them promptly to prevent further damage.