How do I calculate the load for a single room?

Use the `calculate_room_fixture_load` tool by providing a JSON array of fixtures, where each object includes the fixture type and its quantity.

Can I calculate the total load for an entire building?

Yes, use the `aggregate_building_load` tool by passing in the results from your individual room calculations.

How does the pipe diameter estimation work?

The `estimate_minimum_pipe_diameter` tool compares your current DFU or WSFU load against standard capacity limits for both horizontal branches and vertical stacks to find the smallest required diameter.

Plumbing Fixture Units Calculator MCP Connector for Claude

A+

Calculate DFU and WSFU loads and size plumbing pipe diameters according to IPC/UPCA standards.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides specialized tools for plumbing engineering calculations. Use calculate_room_fixture_load to determine the Drainage Fixture Units (DFU) and Water Supply Fixture Units (WSFU) for individual rooms based on fixture types and quantities. The aggregate_building_load tool allows you to sum these loads across multiple rooms to find the total building load. Finally, use estimate_minimum_pipe_diameter to determine the required minimum pipe diameter for horizontal branches or vertical stacks based on the calculated cumulative load.

plumbingipcupcdfuwsfupipe-sizing

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_Cx3N4FVfJZC8en65Flegv6dvuLHyXDoJKWzAv7oX/mcp

② Claude Code (terminal)

claude mcp add --transport http plumbing-fixture-units-calculator https://edge.vinkius.com/vk_preview_Cx3N4FVfJZC8en65Flegv6dvuLHyXDoJKWzAv7oX/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "plumbing-fixture-units-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_Cx3N4FVfJZC8en65Flegv6dvuLHyXDoJKWzAv7oX/mcp"
    }
  }
}

Get full access on Vinkius

The preview token above works for testing. Powered by Vinkius.

Details

Tools: 3
Grade: A+
Score: 100/100
Updated: Oct 1, 2026

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