How to Tighten Threaded Copper Fittings


Copper is generally considered the best material for plumbing in homes and commercial buildings. Copper has special characteristics and thus requires specific methods for joining the tubing and fittings. Many times copper fittings are joined by soldering, but there are occasions when you may need to attach a threaded fitting.

Things You'll Need

  • Pipe thread compound
  • Wrench set
  • Apply pipe thread compound, commonly referred to as "pipe dope," to the threads of both fittings.

  • Place the threads from the male fitting into the female fitting and screw them together until they are hand tight.

  • Place the wrench in a good position on the bead of the fitting and leave it there as you tighten. Repositioning the wrench may mar or gouge the copper surface.

  • Turn the wrench to tighten the fitting. Tighten only one to two turns to avoid overtightening, which could expand and damage the fitting.

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