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Message:: [QUOTE="dwhiz, post: 3127335, member: 25416"]When I first saw the title I was thinking it may be about orangeburg conduit. That was/ is nasty stuff.The first known use of fiber pipe was in an experimental water delivery pipe in the <a href="https://en.wikipedia.org/wiki/Boston" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Boston" rel="nofollow">Boston</a> area. The pipeline, finished in 1867, measured 1.5 miles in length and was in use through 1927. Bitumenized pipe was not in widespread commercial use until the late 19th century when it was utilized exclusively as electrical conduit.<a href="https://www.google.com/search?q=orangeburg+electrical+conduit&rlz=1C1GCEA_enUS782US782&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjNxKbn1JDcAhUHd98KHb5ZCT0Q_AUICygC&biw=1920&bih=947#imgdii=Giw_2JsdAi69xM:&imgrc=Hmnyds68SPhrWM" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.google.com/search?q=orangeburg+electrical+conduit&rlz=1C1GCEA_enUS782US782&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjNxKbn1JDcAhUHd98KHb5ZCT0Q_AUICygC&biw=1920&bih=947#imgdii=Giw_2JsdAi69xM:&imgrc=Hmnyds68SPhrWM" rel="nofollow">https://www.google.com/search?q=orangeburg electrical conduit&rlz=1C1GCEA_enUS782US782&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjNxKbn1JDcAhUHd98KHb5ZCT0Q_AUICygC&biw=1920&bih=947#imgdii=Giw_2JsdAi69xM:&imgrc=Hmnyds68SPhrWM</a>:[/QUOTE]