Skip to main content

Water

Peak Flow Rate Calculation Method

Select a global standard (Australia, UK, Europe, US, or India) (see Overview page) to determine how fixture flow rates are converted into a Peak Flow Rate for the system. Each standard uses a different formula to determine peak flow, reflecting regional variations in water usage patterns and plumbing codes.

Pipe Sizing Method

Choose between three options for pipe sizing:

  1. Maximum Velocity: Ensures the Pipe does not exceed a set Maximum Velocity.

  2. Maximum Pressure Drop: Ensures the Pipe does not exceed a set Maximum Pressure Drop.

  3. Maximum Velocity and Pressure Drop: Ensures the Pipe does not exceed a set maximum on both Velocity and Pressure drop.

Sum Hot and Cold Units from the Same Fixture

Choose whether to sum the hot and cold units (for a fixture that provides both):

  1. Sum: Considers that both Hot and Cold Water can run at full capacity together.

  2. Highest Only: Assumes only one (Hot or Cold) will run simultaneously, using the higher value for calculations.

Sum will consider all Outlets of the Fixture for Pipe Sizing. Highest Only will only consider the worst case (highest Loading Units) of the Fixture for Pipe sizing.

Pressure Loss Method

Select between:

  1. Based on all System Component’s Specific Pressure Loss: Calculates pressure loss based on all components, such as Pipes, Fittings, and Valves, for accurate results.

  2. Percentage on Top of Pipe Lengths Only: Adds a set percentage (e.g., 10-20%) on top of the pipe lengths only, useful when Fittings and Valves are not fully modelled.

Wind Speed for Heat Loss

Higher 'wind' (e.g. air movement in the building) speeds will increase heat load on pipes.