What is the typical size of the inlet supply connection to a multipoint water heater?

The typical size of the inlet supply connection to a multipoint water heater is generally 15mm. This standard size is commonly used in residential plumbing systems, providing an adequate flow of hot water while maintaining pressure. The 15mm connection allows for compatibility with existing plumbing infrastructure, making installation easier and more efficient in most homes.

Multipoint water heaters are designed to supply hot water to multiple outlets, so they need to have a sufficient inlet size that balances water flow and pressure without causing excessive energy consumption or inefficiencies in the system. A 15mm inlet strikes a good balance between being robust enough to supply hot water quickly and being compact enough to integrate seamlessly into standard piping systems found in residential environments.

With larger connections, while they might offer the potential for greater flow, they are less common for the typical applications of multipoint water heaters in residential settings and may require more extensive modifications to existing plumbing.