For adequate pressure, how far below the cold water storage cistern should the showerhead of a gravity-fed mixer shower be?

To ensure adequate pressure for a gravity-fed mixer shower, the height of the cold water storage cistern in relation to the showerhead is critical. The showerhead should ideally be positioned at least 1 meter below the cold water storage cistern. This distance helps maintain sufficient water pressure for effective shower performance.

When water flows under gravity, the pressure exerted by the water column above the outlet of the showerhead is what drives the water out. A minimum height of 1 meter allows for a sufficient water column to provide an acceptable flow rate and pressure at the showerhead, ensuring a comfortable and functional experience for the user.

While other options suggest varying heights, only the 1 meter distance balances both pressure and practical installation considerations, making it the ideal choice for most domestic installations. This ensures appropriately managed flow rates and ensures that the system is efficient within an average domestic plumbing setup.