The answer to 'how much is supply line' is that the cost of a plumbing supply line can vary widely depending on several factors. Supply lines are the flexible tubes that connect water sources, such as sinks and toilets, to the main water supply. The price can range from $5 to $50 or more, depending on the material, length, and quality of the line.
Some key factors that influence the cost of a supply line include the type of material (e.g., plastic, stainless steel, or braided metal), the diameter of the line, the length, and any additional features like shut-off valves. Higher-quality, longer, or specialty supply lines will be more expensive. The cost can also vary based on your local market and the specific plumbing needs of your home.