NAICS Code 423720

NAICS 423720

NAICS Code 423720 – Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers

Definition of NAICS Code 423720: This industry comprises establishments primarily engaged in the merchant wholesale distribution of plumbing equipment, hydronic heating equipment, household-type water heaters, and/or supplies.

  • You can also download your own copy of the complete 2017 NAICS Classification Manual. The NAICS Manual is updated every five years. The 2017 copy will be applicable until a new edition is produced in 2022.

Cross Reference Guide for Code 423720

What codes are similar to this classification that might be a more applicable code? The cross-reference guide below displays the codes for other similar industries. Please review to find the most applicable classification.

  • Selling and installing plumbing, heating and air conditioning equipment–are classified in Industry NAICS 238220, Plumbing, Heating, and Air-Conditioning Contractors;
  • Merchant wholesale distribution of warm air heating and air-conditioning equipment–are classified in Industry NAICS 423730, Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers; and
  • Merchant wholesale distribution of household-type gas and electric appliances (except water heaters and heating stoves (i.e., noncooking)), room air-conditioners, clothes dryers, and/or household-type audio or video equipment–are classified in Industry NAICS 423620, Household Appliances, Electric Housewares, and
  • Consumer Electronics Merchant Wholesalers.

Other Index Entries for NAICS 423720

The North American Industry Classification System contains multiple index entries that are each descriptive of the same code. The bulleted list below shows all applicable index entries (Current and former) that are associated with this classification. These index entries further elaborate on the scope of applicable industries that have already been defined at the top of this page.

  • Boilers (e.g., heating, hot water, power, steam) merchant wholesalers
  • Brass goods, plumbers’, merchant wholesalers
  • Burners, fuel oil and distillate oil, merchant wholesalers
  • Fireplaces, gas, merchant wholesalers
  • Fittings and valves, plumbers’, merchant wholesalers
  • Fountains, drinking (except refrigerated), merchant wholesalers
  • Furnaces, (except forced air), heating, merchant wholesalers
  • Gas fireplaces merchant wholesalers
  • Gas hot water heaters merchant wholesalers
  • Heating boilers, steam and hot water, merchant wholesalers
  • Heating equipment, hot water, merchant wholesalers
  • Hydronic heating equipment and supplies merchant wholesalers
  • Oil burners, heating, merchant wholesalers
  • Plumbers’ brass goods merchant wholesalers
  • Plumbing and heating valves merchant wholesalers
  • Plumbing equipment merchant wholesalers
  • Plumbing fixtures merchant wholesalers
  • Plumbing supplies merchant wholesalers
  • Sanitary ware, china or enameled iron, merchant wholesalers
  • Solar heating panels and equipment merchant wholesalers
  • Stoves (i.e., noncooking), heating, merchant wholesalers
  • Valves, plumbing and heating, merchant wholesalers
  • Water heaters, gas and electric, merchant wholesaler
  • Water softening and conditioning equipment merchant wholesalers

Suggested Insurance Conversion Table for NAICS Code 423720

Looking for an insurance classification other than the North American Industry Classification System? If a company falls within the industry defined on this page, then the class codes mentioned below may be applicable. Please note that the bulleted cross-reference guide below is not authoritative. Users should have an insurance professional review to ensure proper insurance classification.

  • NCCI WC (Varies by state): 8111NAICS 423720
  • CA WC: 8111
  • DE WC: 885
  • PA WC: 885
  • MI WC: 8111
  • NJ WC: 8111
  • NY WC: 8111
  • WY WC: 423720
  • GL: 16527
  • SIC: 5074

Resources: Praxiom, AceGroupTDICalifornia Division of Workers Compensation, Delaware Workers Compensation Manual, Pennsylvania Workers Compensation Manual, Michigan Workers’ Compensation Placement Facility: Classification Definitions, New Jersey Workers Compensation and Employers Liability Insurance Manual, New York Workers Compensation and Employers Liability, North American Industry Classification System, Florida Underwriting Guide: Commercial General Liability Classifications,  Standard Industrial Classifications.

The suggested cross reference guide for NAICS code 423720 is based on our research using the resources cited above.

Correlating Code Breakdown for North American Industry Classification System

NAICS codes are broken down by digit. The broadest description starts with the 2 digit sector codes. The 3 digit subsector codes are more specific, then the 4 digit industry group, 5 digit industry, and the most specific is the 6 digit NAICS code (Where you are now). If the code on this page does not describe the industry of the business in question, then select the largest applicable code below. From there, follow through the progression of smaller digits to the larger digits in order to obtain the most specific 6 digit classification.

  • Sector 42: Wholesale Trade
  • Subsector 423: Merchant Wholesalers, Durable Goods
  • Industry Group 4237: Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers
  • Industry 42372: Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
  • 6 Digit Code(s) NAICS 423720: Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
Other helpful NAICS Downloads

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NAICS Code 423720