NAICS Code 423720: Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
National industry
SBA small business size standard: 200 employees
Definition
This industry comprises establishments primarily engaged in the merchant wholesale distribution of plumbing equipment, hydronic heating equipment, household-type water heaters, and/or supplies.
Government contracts for this product: PSC 4520 Space and Water Heating Equipment and PSC 4510 Plumbing Fixtures and Accessories
Code facts
- Part of
-
-
42
-
423
-
4237
- 42372
-
4237
-
423
-
42
- Contract awards
- 50 In the last 12 months
- Contract obligations
- $1,579,085 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 423720
- 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
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $72,181 |
| FY2026 | $1,553,924 |
| FY2025 | $1,579,085 |
| FY2024 | $1,810,657 |
| FY2023 | $1,764,639 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Ferguson Enterprises LLC | $214,065 | |
| 2 | Water Heater Distributors, LLC | $156,684 | |
| 3 | Taza Supplies Inc. | $114,480 | |
| 4 | F.w. Webb Company | $112,245 | |
| 5 | Midway Industrial Supply Inc. | $93,270 | |
| 6 | Pennergy Solutions LLC | $72,300 | |
| 7 | N Brayton LLC | $69,896 | |
| 8 | Morgan Ingland LLC | $61,294 | |
| 9 | Ferguson Enterprises, LLC | $55,955 | |
| 10 | Samit LLC | $50,498 |
See the full FY2025 ranking of NAICS 423720 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Justice | $1,082,074 | |
| 2 | Department of State | $110,222 | |
| 3 | Defense Logistics Agency | $105,226 | |
| 4 | Department of Homeland Security | $96,159 | |
| 5 | Air Force | $88,294 | |
| 6 | Smithsonian Institution | $58,818 | |
| 7 | Department of the Navy | $45,414 | |
| 8 | US Agency for Global Media | $40,000 | |
| 9 | Department of Transportation | $16,625 | |
| 10 | Department of Veterans Affairs | $10,973 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 4520 Space and Water Heating Equipment | $533,951 | |
| 2 | 4510 Plumbing Fixtures and Accessories | $476,385 | |
| 3 | 4610 Water Purification Equipment | $122,625 | |
| 4 | 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings | $120,175 | |
| 5 | N045 Installation of Equipment: Plumbing, Heating, and Waste Disposal Equipment | $72,300 | |
| 6 | 8465 Individual Equipment | $69,896 | |
| 7 | 4410 Industrial Boilers | $48,232 | |
| 8 | 5950 Coils and Transformers | $41,538 | |
| 9 | 4320 Power and Hand Pumps | $24,591 | |
| 10 | J020 Maintenance, Repair and Rebuilding of Equipment: Ship and Marine Equipment | $24,480 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Virginia | $273,519 | |
| 2 | Pennsylvania | $258,521 | |
| 3 | New York | $159,718 | |
| 4 | Illinois | $156,557 | |
| 5 | Maryland | $130,626 | |
| 6 | Massachusetts | $112,245 | |
| 7 | Ohio | $73,023 | |
| 8 | Texas | $72,794 | |
| 9 | Wyoming | $61,294 | |
| 10 | Georgia | $47,394 | |
| 11 | Oklahoma | $44,759 | |
| 12 | Connecticut | $42,966 | |
| 13 | Nebraska | $40,000 | |
| 14 | Minnesota | $34,527 | |
| 15 | Missouri | $24,862 | |
| 16 | District of Columbia | $21,091 | |
| 17 | South Carolina | $19,661 | |
| 18 | California | $6,126 | |
| 19 | Wisconsin | $2,209 |
Show all 19
Shares are of everything obligated under NAICS 423720 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 583 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 423720?
NAICS 423720 is Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers, a national industry in NAICS 42, Wholesale Trade.
What is the NAICS code for gas fireplaces merchant wholesalers?
The NAICS code for gas fireplaces merchant wholesalers is 423720, Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers.
What is the NAICS code for plumbing fixtures merchant wholesalers?
The NAICS code for plumbing fixtures merchant wholesalers is 423720, Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers.
What is the NAICS code for plumbers' brass goods merchant wholesalers?
The NAICS code for plumbers' brass goods merchant wholesalers is 423720, Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers.
When did the size standard for NAICS 423720 last change?
The most recent Federal Register rule on record that names NAICS 423720 in the SBA's size standards is "Small Business Size Standards: Employee Based Size Standards in Wholesale Trade and Retail Trade" (81 FR 3941), published Jan 25, 2016 and effective Feb 26, 2016.
How much do federal agencies spend under NAICS 423720?
Federal contracts under NAICS 423720 obligated $1,579,085 in fiscal year 2025 and $6,780,486 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 423720?
The contractors with the most obligated under NAICS 423720 in fiscal years 2026 and 2027 are Ferguson Enterprises LLC ($214,065); Water Heater Distributors, LLC ($156,684); and Taza Supplies Inc. ($114,480).
Which agencies buy the most under NAICS 423720?
The agencies that obligated the most under NAICS 423720 in fiscal years 2026 and 2027 are Department of Justice ($1,082,074), Department of State ($110,222) and Defense Logistics Agency ($105,226).
Which PSC codes are used with NAICS 423720?
The PSC codes with the most obligated under NAICS 423720 in fiscal years 2026 and 2027 are 4520 Space and Water Heating Equipment, 4510 Plumbing Fixtures and Accessories and 4610 Water Purification Equipment.
Where is the work under NAICS 423720 performed?
By place of performance, the states with the most contract obligations under NAICS 423720 over the last 12 months are Virginia ($273,519), Pennsylvania ($258,521) and New York ($159,718).
What is the latest contract opportunity under NAICS 423720?
The latest contract opportunity under NAICS 423720 is Residential well water chemical feeder, award notice from Coast Guard, posted August 25, 2026.
On GovTribe
See everything under NAICS 423720
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
- Contacts who buy under this code
- Ask GovTribe AI about this code