Plumbers and pipefitters were exposed to asbestos because the systems they built and repaired were wrapped in it. Steam, hot water, and process piping wore asbestos insulation; flanged joints sealed with asbestos gaskets; valves packed with asbestos rope. Getting to the pipe meant getting through the asbestos. The National Cancer Institute identifies asbestos exposure as the primary cause of mesothelioma, typically appearing 20 to 50 years after exposure (NCI asbestos fact sheet).
The tasks that released fibers
Four jobs came up over and over in a fitter’s career, and each one made dust. The trade’s own tools made it worse: wire brushes, scrapers, and saws all turn solid material into breathable dust.
- Stripping insulation. Before cutting or threading an existing line, the fitter tore off the old lagging around the work area, usually by hand, usually overhead.
- Scraping gaskets. Old asbestos gaskets bake onto flange faces. Removing one meant scraping and wire-brushing it off in pieces, close to the face.
- Pulling packing. Repacking a valve meant digging out the old asbestos rope packing with a pick.
- Cutting new materials. Fitters also cut and drilled asbestos-cement pipe, common in water and drainage service, and worked alongside insulators lagging the new runs.
Each task alone might last minutes. Repeated across a thirty-year career, in mechanical rooms and pipe trenches with stagnant air, the doses accumulated. The Agency for Toxic Substances and Disease Registry notes that no safe level of asbestos exposure has been established (ATSDR).
Where Pennsylvania fitters did this work
The trade’s heaviest exposures in this state came from industrial piping. The refinery complex at Marcus Hook, covered on our Marcus Hook refineries page, ran miles of insulated process pipe and employed generations of Delaware County fitters. Turnarounds at the refineries pulled in fitters by the hundred, and the insulation came off entire units at once. Steel mills, chemical plants, powerhouses, and shipyards each had their own pipe gangs. On the building side, plumbers met asbestos in boiler rooms, in old pipe chases, and in the cement-asbestos pipe used for water and sewer work. The full trade list is on our occupations with asbestos exposure index; the closest neighbors are insulators, who lagged the lines fitters ran, and HVAC technicians.
Residential work counted too
Not every fitter worked refineries. House plumbers met the same materials at smaller scale: asbestos-insulated boilers and steam lines in basements, cement-asbestos flue pipe, and gaskets in every hydronic fitting. A plumber who spent a career in Philadelphia or Scranton rowhouse basements handled old lagging on nearly every heating call, and those small, repeated jobs add up the same way the big ones did.
Take-home exposure
Lagging dust and gasket scrapings ended up on coveralls and in lunchboxes and cars. The National Cancer Institute notes that fibers carried home on work clothing put family members at risk (NCI). A fitter’s spouse or children can have their own claim history built on those years of laundry. Union families describe the ritual: coveralls shaken out on the porch, then into the machine with everything else.
What this means for your family
Pipefitter cases rest on a well-worn evidentiary path. Union locals kept dispatch and pension records that establish job sites and dates. The manufacturers of pipe covering, gaskets, packing, and cement pipe are identifiable, and many funded asbestos bankruptcy trusts, which the U.S. Government Accountability Office reported held roughly $30 billion (GAO-11-819). Trust claims and a Pennsylvania court case often run in parallel. The window to file in Pennsylvania is generally two years from discovery of the disease under 42 Pa. C.S. § 5524, and if the fitter has died, wrongful death and survival actions under 42 Pa. C.S. §§ 8301-8302 generally give the family two years from the date of death.
If pipe work paid your family’s bills and mesothelioma is now the diagnosis, bring the work history, even an incomplete one, to a free case review and we will fill in the rest.