PSC C221: Architect and Engineering – General: Plumbing Systems
C221 is the product and service code (PSC) federal agencies use for architect and engineering – general: plumbing systems, in the arch – eng svcs – general group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 0
- Spending, FY2026
- $3.3 million
- Share to small businesses
- 111%
Where C221 sits in the PSC Manual
- Category: Service
- Group C: Architect/Engineer Services
- Group C2: Arch – Eng SVCS – General
- Code C221: Architect and Engineering – General: Plumbing Systems
NAICS codes used with PSC C221
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with C221 most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 541330 | Engineering Services | $7.4 million |
| 237110 | Water and Sewer Line and Related Structures Construction | $1.9 million |
| 541310 | Architectural Services | $1.4 million |
| 238220 | Plumbing, Heating, and Air-Conditioning Contractors | $219,386 |
| 561210 | Facilities Support Services | $218,892 |
| 541620 | Environmental Consulting Services | $206,849 |
Who buys under PSC C221
Agencies with the most contract dollars under C221 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of Veterans Affairs | $4.5 million |
| Department of the Air Force | $2.7 million |
| Department of the Army | $1.9 million |
| Bureau of Indian Affairs and Bureau of Indian Education | $1.3 million |
| Department of State | $245,412 |
| National Archives and Records Administration | $218,892 |
| National Park Service | $206,849 |
| Department of the Navy | $174,667 |
Federal spending under PSC C221 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $6.7 million |
| FY2025 | $1.5 million |
| FY2026 | $3.3 million |
| FY2027 (so far) | $0 |
Who wins PSC C221 contracts
| Company | Obligated, last 3 years |
|---|---|
| Borja Engineering & Construction, Inc | $4.3 million |
| NPD Associates, Inc | $1.5 million |
| Oates Associates Inc | $1.4 million |
| WBK Engineering LLC | $1.3 million |
| Toland Mizell Molnar LLC | $968,800 |
| Miller-Remick, LLC | $757,635 |
| Insynergy Engineering Inc | $735,673 |
| Spees LLC | $584,451 |
| Ffe Environmental Services Inc | $397,892 |
| Wja PLLC | $361,899 |
Related PSC codes
- C211 Architect and Engineering – General: Landscaping, Interior Layout, and Designing
- C212 Architect and Engineering – General: Engineering Drafting, Not Cad/Cam
- C213 Architect and Engineering – General: Inspection (Non – Construction)
- C214 Architect and Engineering – General: Management Engineering
- C215 Architect and Engineering – General: Production Engineering
- C216 Architect and Engineering – General: Marine Engineering
- C217 A/E – Mapping
- C218 A/E – Surveying
- C219 Architect and Engineering – General: Other
- C220 Architect and Engineering – General: Structural Engineering
Frequently asked questions
What is PSC C221?
C221 is the service code in the federal Product and Service Code (PSC) Manual for architect and engineering – general: plumbing systems, under C (Architect/Engineer Services) and C2 (Arch – Eng SVCS – General). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
Which NAICS code goes with PSC C221?
Most federal contract dollars under PSC C221 go with NAICS 541330 (Engineering Services), according to USAspending.gov. The contracting officer picks the NAICS code for each solicitation, so check the notice.
How do I find contracts that use PSC C221?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. FedReady can match new ones to your business and email you, free.