- Local 1, New York, New York
- Local 102, Knoxville, Tennessee
- Local 112, Binghamton, New York
- Local 12, Boston, Massachusetts
- Local 123, Tampa Florida
- Local 125, Cedar Rapids, Iowa
- Local 13, Rochester, New York
- Local 136, Evansville, Indiana
- Local 15, Minneapolis, Minnesota
- Local 150, Augusta, Georgia
- Local 157, Terre Haute, Indiana
- Local 159, Martinez, California (HVAC, Plumbers, Stemfitters)
- Local 17, Memphis, Tennessee (Plumbers)
- Local 172, South Bend, Indiana
- Local 174, West Michigan
- Local 183, Milwaukee, Wisconsin
- Local 188, Savannah, Georgia
- Local 190, Ann Arbor, Michigan
- Local 200, Long Island, New York
- Local 208, Denver, Colorado
- Local 21, Yonkers, New York
- Local 211, Houston, Texas
- Local 23, Rockford, Illinois
- Local 230, San Diego, California
- Local 234, Jacksonville, Florida (Plumbers, Pipefitters)
- Local 24, Newark, New Jersey (Plumbers)
- Local 246, Fresno, California
- Local 25, Rock Island, Illinois
- Local 250, Los Angeles, California (Pipefitters)
- Local 254, Winnipeg, MB, Canada
- Local 26, Everett, Washington
- Local 267, Syracuse, New York
- Local 268, St. Louis, Missouri
- Local 27, Pittsburgh, Pennsylvania (Plumbers)
- Local 274, Ridgefield, New Jersey
- Local 281, Chicago, Illinois
- Local 286, Austin, Texas
- Local 290, Portland, Oregon
- Local 295, Daytona Beach, Florida
- Local 3, Aurora, Colorado
- Local 314, Kansas City, Missouri
- Local 32, Seattle, Washington (Plumbers & Pipefitters)
- Local 322, Southern New Jersey
- Local 33, Des Moines, Iowa
- Local 342, Oakland, California
- Local 343, Vallejo, California
- Local 367, Anchorage, Alaska
- Local 370, Flint, Michigan
- Local 38, San Francisco, CA (Plumbers, Pipefitters, Marine PF)
- Local 392, Cincinnati, Ohio
- Local 393, San Jose, California
- Local 396, Boardman, Ohio
- Local 4, Worcester, Massachusetts
- Local 400, Green Bay, Wisconsin
- Local 412, Albuquerque, New Mexico
- Local 42, Norwalk, Ohio
- Local 420, Philadelphia, Pennsylvania
- Local 421, Charleston, South Carolina
- Local 43, Chattanooga, Tennessee
- Local 430, Tulsa, Oklahoma
- Local 434, Wausau, Wisconsin
- Local 440, Indianapolis, Indiana
- Local 441, Wichita, Kansas
- Local 449, Pittsburgh, PA
- Local 452, Lexington, Kentucky
- Local 455, St. Paul, Minnesota
- Local 464, Omaha, Nebraska
- Local 467, Burlingame, California
- Local 469, Phoenix, Arizona
- Local 47, Northwest, Pennsylvania
- Local 475, Warren, New Jersey
- Local 483, San Francisco, California
- Local 486, Baltimore, Maryland
- Local 5,Washington, D.C.
- Local 50, Northwood, Ohio
- Local 501, Aurora, Illinois
- Local 51, East Providence, Rhode Island
- Local 519, Miami, Florida
- Local 52, Montgomery, Alabama
- Local 520, Harrisburg, Pennsylvania
- Local 525, Las Vegas, Nevada
- Local 533, Kansas City, Missouri
- Local 536, Baltimore, Maryland
- Local 537, Boston, Massachusetts
- Local 538, Johnson City, Tennessee
- Local 550, Boston, Massachusetts
- Local 572, Nashville, Tennessee
- Local 582, Santa Ana, California
- Local 597, Chicago, Illinois
- Local 598, Pasco, Washington
- Local 60, New Orleans, Louisiana
- Local 601, Milwaukee, Wisconsiná
- Local 614, Memphis, Tennessee (Plumbers & Pipefitters)
- Local 630, West Palm Beach, Florida (HVAC, Plumbers, Pipefitters)
- Local 636, Detroit, Michigan
- Local 638, NYC and Long Island, New York
- Local 669, Columbia, Maryland
- Local 675, Honolulu, Hawaii
- Local 690, Philadelphia, Pennsylvania (Plumbers)
- Local 692, Philadelphia, Pennsylvania
- Local 693, South Burlington, Vermont
- Local 696, Newark, New Jersey
- Local 699, Seattle, Washington
- Local 7, Albany, New York
- Local 709, Los Angeles, California
- Local 716, State of Maine
- Local 72, Atlanta, Georgia
- Local 725, Miami, Florida
- Local 73, Oswego, New York
- Local 74, Wilmington, Delaware
- Local 75, Milwaukee, Wisconsin
- Local 773, Glens Falls
- Local 777, State of Connecticut
- Local 78, Los Angeles, California (Plumbers)
- Local 798, Pipeliners, Tulsa Oklahoma
- Local 8, Kansas City, Missouri
- Local 803, Orlando, Florida (HVAC, Plumbers, Pipefitters)
- Local 821, State of Florida
- Local 855, Jersey City, New Jersey
- Local 9, Englishtown, New Jersey
- Local 93, Waukegan, Illinois
- Local 98, Detroit, Michigan
- UA Local 149, Savoy, Illinois
- Local 254, Winnipeg, Manitoba
- Local 324, Victoria, British Columbia
- Local 488, Edmonton, Canada
- Local 496, Calgary, Alberta
- Local 527, Kitchener, Ontario
- Local 663, Sarnia, Ontario, Canada
- Local 67, Hamilton, Ontario
- Local 682, Cape Breton
- Local 71, Ottawa, Ontario
- Local 787, Ontario, Canada
