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

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What is NAICS 423720

NAICS code 423720 covers establishments primarily engaged in the merchant wholesale distribution of plumbing equipment, hydronic heating equipment, household-type water heaters, and related supplies. Businesses operating in this sector typically serve as intermediaries between manufacturers and end-users, ensuring the timely availability of essential products for construction, maintenance, and repair projects. These wholesalers play a critical role in supply chain efficiency, offering a broad inventory of components necessary for plumbing and heating systems, including pipes, valves, fittings, and boilers. Government agencies contract for these services to support infrastructure development, facility maintenance, and public building operations, requiring reliable access to quality plumbing and heating equipment to meet regulatory standards and operational demands. The sector’s focus on hydronic systems reflects increasing attention to energy efficiency and sustainable heating solutions in public projects.

Industry Classification for NAICS 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.

Breakdown for NAICS 423720

  • Focuses on wholesale distribution of plumbing and hydronic heating equipment and supplies.
  • Includes products such as pipes, valves, fittings, boilers, and household water heaters.
  • Supports construction, maintenance, and repair projects across public and private sectors.
  • Small to medium-sized businesses commonly operate under this NAICS code with size standards based on annual receipts.
  • Government contracts are critical for supplying public infrastructure and facility management needs.

Included Activities for NAICS 423720

  • Wholesale distribution of plumbing fixtures and fittings.
  • Supplying hydronic heating system components and accessories.
  • Providing household water heaters and related equipment.
  • Managing inventory and logistics for timely delivery to government projects.
  • Ensuring product compliance with safety and environmental standards.
  • Facilitating technical support and product consultation for buyers.
  • Coordinating with manufacturers for specialized or custom orders.
  • Maintaining supply agreements and contract compliance documentation.

Business Types for NAICS 423720

  • Merchant wholesalers specializing in plumbing and heating equipment.
  • Distributors of hydronic heating systems and components.
  • Suppliers of household water heating appliances.
  • Small and medium enterprises focusing on building maintenance supplies.
  • Regional and national wholesale distributors serving government contracts.

Subcategories for NAICS 423720

  • Bathtubs merchant wholesalers
  • Boilers (e.g., heating, hot water, power, steam) merchant wholesalers
  • Brass goods, plumbers', merchant wholesalers
  • Burners, fuel oil and distillate oil, merchant wholesalers
  • Convectors merchant wholesalers
  • Drinking fountains (except refrigerated) merchant wholesalers
  • Fireplaces, gas, merchant wholesalers
  • Fireplaces, prefabricated 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
  • Lavatory fixtures merchant wholesalers
  • Oil burners, heating, merchant wholesalers
  • Pipe and boiler coverings merchant wholesalers
  • Pipe fittings and valves, plumbers', 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
  • Radiators, heating, nonelectric, merchant wholesalers
  • Sanitary ware, china or enameled iron, merchant wholesalers
  • Sinks merchant wholesalers
  • Solar heating panels and equipment merchant wholesalers
  • Spa equipment merchant wholesalers
  • Stoves (i.e., noncooking), heating, merchant wholesalers
  • Toilet bowls and tanks merchant wholesalers
  • Urinals merchant wholesalers
  • Valves, plumbing and heating, merchant wholesalers
  • Water heaters, gas and electric, merchant wholesaler
  • Water purification equipment, household-type, merchant wholesalers
  • Water softening and conditioning equipment merchant wholesalers

Government Buyers for NAICS 423720

Government buyers for NAICS 423720 services typically include federal, state, and local agencies responsible for public works, housing authorities, military installations, and educational institutions. These agencies require plumbing and heating supplies to maintain and upgrade public facilities, ensuring compliance with health, safety, and environmental regulations. Agencies such as the Department of Defense, General Services Administration, and public school districts frequently procure these goods to support large-scale maintenance programs, new construction, and retrofit projects. The need for dependable supply chains and prompt delivery makes wholesalers in this sector strategic partners for government entities aiming to minimize downtime and maintain operational continuity in critical infrastructure.

Contract Types & Procurement for NAICS 423720

Contracts in this NAICS sector commonly include fixed-price supply contracts, indefinite delivery/indefinite quantity (IDIQ) agreements, and blanket purchase agreements (BPAs). Procurement methods often involve competitive bidding, negotiated procurements, and simplified acquisition procedures, depending on the contract value and urgency. Typical contract values vary widely, from small orders for maintenance supplies to multi-million-dollar contracts supporting large infrastructure projects or military base operations. Long-term agreements are favored to ensure consistent supply and pricing stability. Government buyers emphasize compliance with regulatory standards, delivery schedules, and product certifications, influencing contract terms and vendor selection criteria.

Details for NAICS 423720

Explore the hierarchy and related codes for this industry

NAICS Code Industry Title
423 Merchant Wholesalers, Durable Goods
4231 Motor Vehicle and Motor Vehicle Parts and Supplies Merchant Wholesalers
42311 Automobile and Other Motor Vehicle Merchant Wholesalers
423110 Automobile and Other Motor Vehicle Merchant Wholesalers
42312 Motor Vehicle Supplies and New Parts Merchant Wholesalers
423120 Motor Vehicle Supplies and New Parts Merchant Wholesalers
42313 Tire and Tube Merchant Wholesalers
423130 Tire and Tube Merchant Wholesalers
42314 Motor Vehicle Parts (Used) Merchant Wholesalers
423140 Motor Vehicle Parts (Used) Merchant Wholesalers
4232 Furniture and Home Furnishing Merchant Wholesalers
42321 Furniture Merchant Wholesalers
423210 Furniture Merchant Wholesalers
42322 Home Furnishing Merchant Wholesalers
423220 Home Furnishing Merchant Wholesalers
4233 Lumber and Other Construction Materials Merchant Wholesalers
42331 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers
423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers
42332 Brick, Stone, and Related Construction Material Merchant Wholesalers
423320 Brick, Stone, and Related Construction Material Merchant Wholesalers
42333 Roofing, Siding, and Insulation Material Merchant Wholesalers
423330 Roofing, Siding, and Insulation Material Merchant Wholesalers
42339 Other Construction Material Merchant Wholesalers
423390 Other Construction Material Merchant Wholesalers
4234 Professional and Commercial Equipment and Supplies Merchant Wholesalers
42341 Photographic Equipment and Supplies Merchant Wholesalers
423410 Photographic Equipment and Supplies Merchant Wholesalers
42342 Office Equipment Merchant Wholesalers
423420 Office Equipment Merchant Wholesalers
42343 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers
423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers
42344 Other Commercial Equipment Merchant Wholesalers
423440 Other Commercial Equipment Merchant Wholesalers
42345 Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
423450 Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
42346 Ophthalmic Goods Merchant Wholesalers
423460 Ophthalmic Goods Merchant Wholesalers
42349 Other Professional Equipment and Supplies Merchant Wholesalers
423490 Other Professional Equipment and Supplies Merchant Wholesalers
4235 Metal and Mineral (except Petroleum) Merchant Wholesalers
42351 Metal Service Centers and Other Metal Merchant Wholesalers
423510 Metal Service Centers and Other Metal Merchant Wholesalers
42352 Coal and Other Mineral and Ore Merchant Wholesalers
423520 Coal and Other Mineral and Ore Merchant Wholesalers
4236 Household Appliances and Electrical and Electronic Goods Merchant Wholesalers
42361 Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
423610 Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
42362 Household Appliances, Electric Housewares, and Consumer Electronics Merchant Wholesalers
423620 Household Appliances, Electric Housewares, and Consumer Electronics Merchant Wholesalers
42369 Other Electronic Parts and Equipment Merchant Wholesalers
423690 Other Electronic Parts and Equipment Merchant Wholesalers
4237 Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers
42371 Hardware Merchant Wholesalers
423710 Hardware Merchant Wholesalers
42372 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
423720 Current Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
42373 Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
423730 Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
42374 Refrigeration Equipment and Supplies Merchant Wholesalers
423740 Refrigeration Equipment and Supplies Merchant Wholesalers
4238 Machinery, Equipment, and Supplies Merchant Wholesalers
42381 Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
423810 Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
42382 Farm and Garden Machinery and Equipment Merchant Wholesalers
423820 Farm and Garden Machinery and Equipment Merchant Wholesalers
42383 Industrial Machinery and Equipment Merchant Wholesalers
423830 Industrial Machinery and Equipment Merchant Wholesalers
42384 Industrial Supplies Merchant Wholesalers
423840 Industrial Supplies Merchant Wholesalers
42385 Service Establishment Equipment and Supplies Merchant Wholesalers
423850 Service Establishment Equipment and Supplies Merchant Wholesalers
42386 Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
423860 Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
4239 Miscellaneous Durable Goods Merchant Wholesalers
42391 Sporting and Recreational Goods and Supplies Merchant Wholesalers
423910 Sporting and Recreational Goods and Supplies Merchant Wholesalers
42392 Toy and Hobby Goods and Supplies Merchant Wholesalers
423920 Toy and Hobby Goods and Supplies Merchant Wholesalers
42393 Recyclable Material Merchant Wholesalers
423930 Recyclable Material Merchant Wholesalers
42394 Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers
423940 Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers
42399 Other Miscellaneous Durable Goods Merchant Wholesalers
423990 Other Miscellaneous Durable Goods Merchant Wholesalers
424 Merchant Wholesalers, Nondurable Goods
4241 Paper and Paper Product Merchant Wholesalers
42411 Printing and Writing Paper Merchant Wholesalers
424110 Printing and Writing Paper Merchant Wholesalers
42412 Stationery and Office Supplies Merchant Wholesalers
424120 Stationery and Office Supplies Merchant Wholesalers
42413 Industrial and Personal Service Paper Merchant Wholesalers
424130 Industrial and Personal Service Paper Merchant Wholesalers
4242 Drugs and Druggists' Sundries Merchant Wholesalers
42421 Drugs and Druggists' Sundries Merchant Wholesalers
424210 Drugs and Druggists' Sundries Merchant Wholesalers
4243 Apparel, Piece Goods, and Notions Merchant Wholesalers
42431 Piece Goods, Notions, and Other Dry Goods Merchant Wholesalers
424310 Piece Goods, Notions, and Other Dry Goods Merchant Wholesalers
42434 Footwear Merchant Wholesalers
424340 Footwear Merchant Wholesalers
42435 Clothing and Clothing Accessories Merchant Wholesalers
424350 Clothing and Clothing Accessories Merchant Wholesalers
4244 Grocery and Related Product Merchant Wholesalers
42441 General Line Grocery Merchant Wholesalers
424410 General Line Grocery Merchant Wholesalers
42442 Packaged Frozen Food Merchant Wholesalers
424420 Packaged Frozen Food Merchant Wholesalers
42443 Dairy Product (except Dried or Canned) Merchant Wholesalers
424430 Dairy Product (except Dried or Canned) Merchant Wholesalers
42444 Poultry and Poultry Product Merchant Wholesalers
424440 Poultry and Poultry Product Merchant Wholesalers
42445 Confectionery Merchant Wholesalers
424450 Confectionery Merchant Wholesalers
42446 Fish and Seafood Merchant Wholesalers
424460 Fish and Seafood Merchant Wholesalers
42447 Meat and Meat Product Merchant Wholesalers
424470 Meat and Meat Product Merchant Wholesalers
42448 Fresh Fruit and Vegetable Merchant Wholesalers
424480 Fresh Fruit and Vegetable Merchant Wholesalers
42449 Other Grocery and Related Products Merchant Wholesalers
424490 Other Grocery and Related Products Merchant Wholesalers
4245 Farm Product Raw Material Merchant Wholesalers
42451 Grain and Field Bean Merchant Wholesalers
424510 Grain and Field Bean Merchant Wholesalers
42452 Livestock Merchant Wholesalers
424520 Livestock Merchant Wholesalers
42459 Other Farm Product Raw Material Merchant Wholesalers
424590 Other Farm Product Raw Material Merchant Wholesalers
4246 Chemical and Allied Products Merchant Wholesalers
42461 Plastics Materials and Basic Forms and Shapes Merchant Wholesalers
424610 Plastics Materials and Basic Forms and Shapes Merchant Wholesalers
42469 Other Chemical and Allied Products Merchant Wholesalers
424690 Other Chemical and Allied Products Merchant Wholesalers
4247 Petroleum and Petroleum Products Merchant Wholesalers
42471 Petroleum Bulk Stations and Terminals
424710 Petroleum Bulk Stations and Terminals
42472 Petroleum and Petroleum Products Merchant Wholesalers (except Bulk Stations and Terminals)
424720 Petroleum and Petroleum Products Merchant Wholesalers (except Bulk Stations and Terminals)
4248 Beer, Wine, and Distilled Alcoholic Beverage Merchant Wholesalers
42481 Beer and Ale Merchant Wholesalers
424810 Beer and Ale Merchant Wholesalers
42482 Wine and Distilled Alcoholic Beverage Merchant Wholesalers
424820 Wine and Distilled Alcoholic Beverage Merchant Wholesalers
4249 Miscellaneous Nondurable Goods Merchant Wholesalers
42491 Farm Supplies Merchant Wholesalers
424910 Farm Supplies Merchant Wholesalers
42492 Book, Periodical, and Newspaper Merchant Wholesalers
424920 Book, Periodical, and Newspaper Merchant Wholesalers
42493 Flower, Nursery Stock, and Florists' Supplies Merchant Wholesalers
424930 Flower, Nursery Stock, and Florists' Supplies Merchant Wholesalers
42494 Tobacco Product and Electronic Cigarette Merchant Wholesalers
424940 Tobacco Product and Electronic Cigarette Merchant Wholesalers
42495 Paint, Varnish, and Supplies Merchant Wholesalers
424950 Paint, Varnish, and Supplies Merchant Wholesalers
42499 Other Miscellaneous Nondurable Goods Merchant Wholesalers
424990 Other Miscellaneous Nondurable Goods Merchant Wholesalers
425 Wholesale Trade Agents and Brokers
4251 Wholesale Trade Agents and Brokers
42512 Wholesale Trade Agents and Brokers
425120 Wholesale Trade Agents and Brokers

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