Профессиональное развитие будущих инженеров-строителей средствами иностранного языка: Лексический практикум по английскому языку. Трубникова Н.В. - 127 стр.

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crush the metal. In most cases you will join copper tubing by utilizing solder-
ing. Soldered joints are always made by utilizing copper fittings with special
smooth interiors and internal stops or shoulders. The actual soldering requires a
propane torch, emery cloth, sandpaper, soldering flux, lead free plumber’s sol-
der and steel wool. Pay attention to never unite the pipes by utilizing solder that
is not labeled lead free when you make various joints that are to be a part of a
potable water supply system or DWV system. Also, if soldering is difficult be-
cause of the location of the copper tubing and plumbing you should utilize
compression fittings. They work well on both soft and hard-temper copper
tubes so there is nothing to worry about.
Although measuring is easy, soldering is not. You do need some experi-
ence to do it properly so if you think you can not do it or you fail you should
call a plumber.