<sod>Pipefitters should not be confused with [[pipelayer]]s. Both trades involve pipe and [[valve]]s and both use some of the same tools.<ref name="Charpentier">Will Charpentier, [http://work.chron.com/pipe-layers-vs-pipe-fitters-24615.html Pipe Layers vs. Pipe Fitters], Demand Media.</ref> However, ''pipelayers'' usually work outside, laying pipe underground or on the seabed, while ''pipefitters'' typically work inside, installing piping in buildings or ships.<ref name="Charpentier"/> One author summarizes the different tasks this way:<eod>
<sod>Pipefitters should not be confused with [[pipelayer]]s. Both trades involve pipe and [[valve]]s and both use some of the same tools.<ref name="Charpentier">Will Charpentier, [http://work.chron.com/pipe-layers-vs-pipe-fitters-24615.html Pipe Layers vs. Pipe Fitters], Demand Media.</ref> However, ''pipelayers'' usually work outside, laying pipe underground or on the seabed, while ''pipefitters'' typically work inside, installing piping in buildings, aeroplanes or ships.<ref name="Charpentier"/> One author summarizes the different tasks this way:<eod>