How far above tub does faucet need to be?

The faucet should typically be mounted at least 6 to 12 inches above the tub rim to ensure adequate clearance for water flow and to prevent splashing. This height can vary based on the design of the faucet and the tub, so it's essential to check the manufacturer's recommendations. Additionally, ensuring the faucet is high enough allows for easier filling of the tub and enhances overall usability.