Which size RV drinking water hose should i use?

For RV drinking water, it's best to use a hose that is 1/2 inch in diameter, as this size provides adequate water flow while being flexible and easy to handle. Look for hoses specifically labeled as "drinking water safe" to ensure they are free from harmful chemicals like lead and BPA. A standard length of 25 to 50 feet is typically sufficient for most RV setups. Always choose a hose that is reinforced to prevent kinking and ensure durability.