# NAICS 423720: Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers

The SBA size standard for NAICS 423720 is 200 employees (13 CFR 121.201).

| Field | Value |
| --- | --- |
| Code | 423720 |
| Title | Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers |
| Level | 6 |
| Parent | 42372 |
| Size standard | 200 employees |
| Footnote | - |

## Description

This industry comprises establishments primarily engaged in the merchant wholesale distribution of plumbing equipment, hydronic heating equipment, household-type water heaters, and/or supplies.

## Sources

- Census NAICS: https://www.census.gov/naics/
- SBA size standards: https://www.sba.gov/document/support-table-size-standards

## API and MCP

- REST: GET https://samgovapi.io/api/v1/naics/423720/size-standard?revenue_usd=...
- MCP tools: naics_lookup, size_standard_check

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