Used to connect fittings together
  - Male Pipe Threads x Male Pipe Threads
  - Both ends fit into female pipe threads
    - Available in 1/8” to 4” diameter and in lengths from close to 12”
  - ANSI / ASME B43-09: Standard specification for seamless red brass pipe, standard sizes
  - ASTM B687-99: Standard specification for brass, copper and chromium-plated pipe nipples
  - ASTM B456: Applicable for chrome-plated nipples
  - ANSI / ASTM B1.20.1: Threads, pipe – general purpose (inch)
  - Naturally lead free alloy