SMOKE DETECTORS? What will, or can be used to make one go off ?
Depends upon the pipe and the method of joining. Copper pipe which has a soldered joint is considered to have a joint weaker than the pipe. Solder is a lead-tin or silver-tin allow which is brittle. Iron pipe with screw on joints, usually has Teflon tape at the joint and if screwed on tightly is very leak-proof and mechanically sound. Plastic pipe usually uses a solvent to melt the pipe and joint fitting. The solvent evaporates leaving a joint which has almost identical properties as the plastic used in the pipe. Glass pipe used in laboratories can use ground-glass fittings or Teflon or even melted glass on glass. This is the most variable of any joint.
T- joint, Elbow, Reducer, Coupling, Nipple (welding, bracing, etc).
