Army MOS · Engineering

12K Plumber

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

Overview

A plumber installs and repairs pipe systems and fixtures. The plumber also installs and repairs petroleum pipeline systems.

Minimum ASVAB: GM 88

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: smartbook-611-21-ch10c-fy2025 (source date 2025-12). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Petroleum pipeline installation and repair

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Plumber

Military installation and repair of pipe systems and fixtures directly overlaps civilian plumbing work.

How to prepare: Submit documented military plumbing experience to an apprenticeship sponsor and the licensing authority for assessment against the typical 4- or 5-year apprenticeship, identifying remaining experience, local-code instruction, and examination gaps rather than assuming a full restart. Most states and some localities require plumbers to be licensed, often requiring 2 to 5 years of experience and a trade examination before independent work.

What the civilian work involves
  • Install underground storm, sanitary, or water piping systems, extending piping as needed to connect fixtures and plumbing.
  • Assemble pipe sections, tubing, or fittings, using couplings, clamps, screws, bolts, cement, plastic solvent, caulking, or soldering, brazing, or welding equipment.
  • Locate and mark the position of pipe installations, connections, passage holes, or fixtures in structures, using measuring instruments such as rulers or levels.

Notes & Sources

  • A high school diploma or equivalent is typically required for trade entry, and most plumbing employers require a driver's license.
Evidence for this guidance (3 documents)
  1. Army COOL MOC feed: 12K Plumber

    [1] data/authority/army-codes.json entry 12K (OSD COOL feed, fetched 2026-07-25); DB rank enlisted, authority codeType enlisted

    Supports: Petroleum pipeline installation and repair, Plumber (O*NET 47-2152.00)

  2. O*NET: Plumbers, Pipefitters, and Steamfitters

    [2] O*NET 30.3 occupational data

    Supports: Plumber (O*NET 47-2152.00)

  3. Bureau of Labor Statistics: plumbers pipefitters and steamfitters

    [3] How to Become One; retrieved 23 September 2026

    Supports: Plumber (O*NET 47-2152.00)

Defense contractor jobs for 12K

Predecessor codes

Historical codes with documented links to 12K. Each history page explains the change.

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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