The answer to 'average cost of supply line' is that the typical range for the cost of a supply line can vary significantly depending on several factors. Supply lines are the flexible pipes that connect fixtures like sinks, toilets, and washing machines to the main water supply lines in your home.
The key factors that influence the cost of a supply line include the material (e.g. stainless steel, braided steel, or plastic), the length needed, the diameter, and whether it's a basic or premium model. Generally, you can expect to pay anywhere from $5 to $50 per supply line, but getting quotes from local plumbers is essential to determine the accurate cost for your specific needs.