What diameter tubing is recommended for connections extending 25 feet to a water dispenser?

The recommendation for using ⅜" OD (outer diameter) tubing for connections extending 25 feet to a water dispenser is driven by the need to ensure adequate water flow and pressure. When water is distributed over longer distances, utilizing a larger diameter tubing helps to minimize pressure loss that can occur due to friction with the walls of the tubing.

In this case, ⅜" OD tubing strikes a balance between maintaining sufficient flow rates and being manageable in terms of installation and compatibilities with standard fittings commonly used in water dispensing systems. It's large enough to provide optimal performance without being excessively bulky or difficult to work with.

Other tubing sizes like ¼" OD may lead to reduced flow rate and increased risk of pressure drops over the 25 feet distance. Larger diameters like ½" or ¾" OD could technically work but might introduce unnecessary complexity in terms of installation and fitting compatibility for typical residential or business water dispensing setups. Thus, ⅜" OD is the most suitable choice for this application.