NAICS 423720: Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers is NAICS code 423720. A business is small under it with 200 employees or fewer. 1 federal contract is open on SAM.gov under this code right now.
- SBA size standard
- 200 employees or fewer
- Open contracts now
- 1
- Federal spending, FY2025
- $1.6 million
- Share won by small businesses
- 59%
- Small businesses registered
- 1,230
Open federal contracts for plumbing and heating equipment and supplies (hydronics) merchant wholesalers
- FCC TERRE HAUTE Heating Condensate Pumps
✦ The Bureau of Prisons at FCC Terre Haute, Indiana wants quotes for heating and condensation pumps, reserved for small businesses.
Due in 7 daysOct 12, 2026
What NAICS 423720 covers
The Census Bureau's NAICS index lists these kinds of work under 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
- 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
The index lists 37 entries for this code in all.
Read the full definition, including what's excluded, on census.gov.
SBA size standard for 423720
To count as a small business for a contract assigned NAICS 423720, your business must have 200 employees or fewer. Employees are averaged over the last 24 months.
From SBA's table of size standards, effective Mar 17, 2023. Confirm it with SBA's size standards tool before you certify your size.
Who buys plumbing and heating equipment and supplies (hydronics) merchant wholesalers
Agencies that awarded the most under NAICS 423720 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Federal Prison System / Bureau of Prisons | $3 million |
| Department of State | $489,182 |
| Department of Veterans Affairs | $487,575 |
| U.S. Coast Guard | $316,463 |
| Defense Logistics Agency | $254,186 |
| Smithsonian Institution | $191,331 |
| Federal Acquisition Service | $58,237 |
| Environmental Protection Agency | $49,946 |
Open notices right now come from Department of Justice (1).
Set-asides on open 423720 contracts
- Total small business set-aside: 1
Not sure which set-asides you qualify for? Try the free SBA certification screener, or read set-aside contracts, explained.
Your competition
1,230 businesses with active SAM.gov registrations are rated small under NAICS 423720, most of them in Texas (151), California (142), Florida (118), New York (57) and Virginia (57). Look any of them up with the free CAGE code and UEI lookup.
Federal spending under 423720 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $1.8 million |
| FY2025 | $1.6 million |
| FY2026 | $1.7 million |
| FY2027 (so far) | $0 |
Source: USAspending.gov, all contract awards with this NAICS code. Fiscal years start October 1.
Related NAICS codes
- 423710 Hardware Merchant Wholesalers
- 423730 Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
- 423740 Refrigeration Equipment and Supplies Merchant Wholesalers
Frequently asked questions
What is NAICS code 423720?
423720 is the 2022 NAICS code for Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers. The Census Bureau's index lists work such as bathtubs merchant wholesalers, boilers (e.g., heating, hot water, power, steam) merchant wholesalers, brass goods, plumbers', merchant wholesalers under it. Federal contracting uses the 2022 codes.
What is the SBA size standard for NAICS 423720?
200 employees or fewer. A business at or under that is small for contracts assigned this code. The current SBA table took effect Mar 17, 2023.
Are there government contracts for plumbing and heating equipment and supplies (hydronics) merchant wholesalers?
Yes. 1 federal contract opportunities under NAICS 423720 are open on SAM.gov right now. Agencies obligated about $1.6 million under this code in fiscal year 2025, according to USAspending.gov.
How do I add NAICS code 423720 to my SAM.gov registration?
Update your entity registration on SAM.gov and add the code on the Goods and Services page, in the Assertions section. You can list several NAICS codes and mark one as your primary. Changes are free.
Keep going
- Search other NAICS codes by keyword or company
- How to choose NAICS codes for government contracts
- NAICS codes with the most open federal contracts
FedReady is an independent company, not affiliated with SBA, SAM.gov, the Census Bureau or any government agency. Open-contract counts come from SAM.gov and update daily; spending figures come from USAspending.gov.