PSC Z1MB

Overview

The Product Service Code (PSC) is the federal government’s standardized classification system for goods and services used in procurement, reporting, and analytics; PSCs drive consistent FPDS/SAM reporting and are maintained through the PSC Manual on Acquisition.gov.¹

PSC Z1MB (MAINTENANCE OF EPG FACILITIES - GAS) identifies maintenance services for energy production and power generation (EPG) facilities that use gas as the primary fuel. The official PSC Manual lists the code and descriptor but does not provide a granular task list, scope-of-work templates, or mandatory NAICS crosswalks for that descriptor.²

• See also on G2X:
  • G2X — PSC Z1MB overview
  • G2X — PSC Z1MA
  • G2X — PSC Z1MG

What this PSC covers

• Maintenance of gas-fired EPG facilities, as listed by the PSC Manual for the code Z1MB.²
• Routine inspections and preventive upkeep. Not specified by official sources²
• Boiler, combustion, and turbine servicing. Not specified by official sources²
• Emergency repairs and corrective maintenance. Not specified by official sources²
• Safety systems testing and calibration. Not specified by official sources²
• Mechanical and balance-of-plant equipment maintenance. Not specified by official sources²

Related NAICS and PSC codes

Type | Code | Descriptor

• | - | -
• | Z1MA | MAINTENANCE OF EPG FACILITIES - COAL
• | Z1MC | MAINTENANCE OF EPG FACILITIES - GEOTHERMAL
• | Z1MG | MAINTENANCE OF EPG FACILITIES - SOLAR
• | Z1MZ | MAINTENANCE OF EPG FACILITIES - OTHER, INCLUDING TRANSMISSION

Codes and descriptors are published in the PSC Manual and accompanying files on Acquisition.gov.²

Contracting contexts

Government solicitations for infrastructure or utility-focused maintenance commonly reference Z-series PSCs when classifying awards for building and non-building maintenance; agencies and FPDS use PSC labels for reporting and basic categorization purposes.¹
Specific operational tasks, scopes of work, security/clearance requirements, and any NAICS crosswalks for Z1MB are defined in individual solicitations or acquisition planning documents rather than in the PSC Manual — the Manual does not enumerate detailed task lists for this code. Not specified by official sources²

Frequently asked questions

• Q: What does Z1MB mean on a solicitation or award?
  A: Z1MB designates services categorized as maintenance of energy production/power generation facilities fueled by gas. The PSC Manual provides the code and official descriptor but does not define detailed work statements or performance specifications for that code.²

• Q: Does Z1MB map to specific NAICS codes?
  A: The PSC Manual does not publish a mandatory NAICS-to-PSC crosswalk for every PSC; agencies typically select NAICS that match the specific work described in each solicitation during acquisition planning.¹

• Q: Can Z1MB be used for pipeline maintenance?
  A: The PSC title focuses on maintenance of EPG facilities that use gas as primary fuel; whether pipeline or distribution system maintenance falls under Z1MB depends on the agency’s scope and solicitation language and is not standardized in the PSC Manual. Not specified by official sources²

• Q: Where to confirm the official descriptor or recent PSC updates?
  A: Check the Acquisition.gov Product and Service Code Manual page and the current PSC Manual PDF for the authoritative list of PSCs, official descriptors, and any revision history.¹

Useful resources

• G2X — PSC Z1MB overview (unnumbered)
• Product and Service Code Manual (Acquisition.gov).¹
• PSC Manual (April 2025 PDF) — official PSC list and descriptors.²

References

1. Product and Service Code Manual — Acquisition.gov: https://www.acquisition.gov/psc-manual
2. PSC Manual (April 2025 PDF) — Acquisition.gov: https://www.acquisition.gov/content/psc-manual-april-2025.pdf