Fire Protection Assembly with a Shielded Automatic Fire Protection Sprinkler

A fire protection assembly comprising:

• a pipe assembly including:
• a pipe wall defining a pipe volume disposed along a central pipe axis, and
• a fitting wall transverse to the pipe wall, the fitting wall having a first end secured to the pipe wall and a second end spaced from the first end along a fitting axis to define a fitting volume, the fitting wall further including an internal thread along the fitting axis;
• and
• a sprinkler disposed within the fitting volume, the sprinkler comprising a housing including:
• a first sprinkler portion defining a passageway, the passageway having an inlet orifice in fluid communication with the pipe volume and an outlet orifice within the fitting volume, wherein the passageway defines a nominal K-factor of the sprinkler;
• a second sprinkler portion that contains a fluid deflection member and a thermally responsive trigger, the second portion disposed within the fitting volume;
• and
• a coupling portion having an external thread that circumscribes the housing for engaging with the internal thread of the fitting wall.