How do I find the fixture unit value for a specific item?

You can use the `get_fixture_unit_reference` tool to retrieve the standard IPC unit value for any recognized plumbing fixture.

What is Hunter's Curve used for in this tool?

Hunter's Curve is used by the `calculate_demand_flow` tool to convert the total sum of fixture units into a realistic demand flow rate in GPM, accounting for simultaneous usage.

Can I specify a maximum pressure drop?

Yes, when using `size_pipe_diameter`, you can provide an optional `targetPressureDropMax` to ensure the selected pipe size stays within your preferred pressure limits.

Plumbing Pipe Sizing MCP Connector for Claude

A+

Deterministic water supply pipe sizing based on IPC and Hunter's Curve.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides precise water supply pipe sizing calculations following the International Plumbing Code (IPC). It uses Hunter's Curve to convert fixture units into required Gallons Per Minute (GPM) and accounts for simultaneous demand factors. Use get_fixture_unit_reference to find unit values, calculate_demand_flow to determine required flow, and size_pipe_diameter to select the optimal pipe size based on available pressure and pipe length.

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