PSC K043

Overview

The Product Service Code (PSC) system is the federal government’s standardized taxonomy for categorizing goods and services used in procurement, enabling consistent reporting, tracking, and analysis of obligations in systems such as FPDS and SAM. The PSC Manual is the authoritative list and guidance for PSC codes. PSC K043 — Modification of Equipment- Pumps and Compressors — is the PSC Manual’s code title for procurements whose primary purpose is modification work on pumps and compressors; the Manual lists the code title but does not provide a line‑by‑line scope, so agencies and buying activities define detailed requirements in solicitations and statements of work. ¹

What this PSC covers

• Equipment modification for pumps and compressors
• Modification kits and retrofit assemblies
• Performance or capability upgrades
• Design or configuration changes to existing units
• Field modification and installation of replacement components

Detailed, prescriptive scope elements and exclusions are not specified by the PSC Manual; agencies define exact requirements in solicitations and statements of work. ¹

Related NAICS and PSC codes

Source: PSC Manual. ¹

How this code is reported and used

Agencies report the applicable PSC for each award in FPDS; the Product/Service Code field must contain a valid PSC from the PSC Manual and should represent the product or service that accounts for the largest share of contract value. Reporting rules and FPDS data element definitions are maintained by FPDS. ³

Frequently asked questions

• Q: When is a modification action coded K043 versus a maintenance action coded J043?
  A: The PSC Manual organizes modification activities under Category K and maintenance/repair activities under Category J; K043 names modification of pumps and compressors, while J043 covers maintenance, repair, and rebuilding of pumps and compressors. Agencies determine coding based on the primary contract purpose. ¹

• Q: Is there a NAICS that always pairs with K043?
  A: There is no single mandatory NAICS that must accompany K043; NAICS selection depends on the industry activity and acquisition strategy. For example, some repair/maintenance work is commonly reported under NAICS 811310, but specific pairings are determined by the contracting office and FPDS reporting. ²

• Q: Do the PSC Manual entries include detailed tasks or exclusions for K043?
  A: The PSC Manual provides the code name and its placement in the PSC structure but does not enumerate detailed task lists or exclusions; detailed scopes are defined in solicitations, statements of work, or specifications issued by the buying activity. ¹

• Q: How should the PSC be selected when a contract contains multiple distinct tasks (modification + installation)?
  A: FPDS guidance directs reporters to select the PSC that represents the product or service accounting for the largest share of contract value; when values are similar, the contracting officer’s judgment and the solicitation’s primary objective determine the PSC selection. ³

Useful resources

• G2X — PSC K043 overview: https://app.g2xchange.com/psc/K043
• Product and Service Code Manual (PSC Manual, official): https://www.acquisition.gov/content/psc-manual-april-2025.pdf ¹
• FPDS Product/Service Code glossary and reporting rules: https://www.fpds.gov/help_V1_1/Glossary.htm ³

References

1. Product and Service Code Manual (PSC Manual April 2025), Acquisition.gov — official PSC list and code titles. https://www.acquisition.gov/content/psc-manual-april-2025.pdf
2. NAICS Search — Census Bureau (example NAICS 811310: Automotive Repair and Maintenance). https://www.census.gov/naics/?input=811310&year=2022
3. FPDS glossary / Product or Service Code guidance, FPDS (Federal Procurement Data System). https://www.fpds.gov/help_V1_1/Glossary.htm