Fire protection sprinkler and fitting assembly

A sprinkler assembly comprising:

• a connection fitting including a tubular member, the tubular member comprising:
• a first insertion end, a second insertion end, and an internal conduit extending between the first insertion end and the second insertion end along a longitudinal axis;
• an exterior surface and an inner surface, the inner surface defining a sealing surface between the first and second insertion ends circumscribed about the longitudinal axis, the inner surface including a gripping portion axially spaced from the sealing surface between the sealing surface and the second insertion end;
• a first stop surface internal from the first insertion end and outward from the sealing surface relative to the longitudinal axis, the first stop surface defining a depth of insertion through the first insertion end past an opening of the internal conduit;
• and
• a second stop surface along the inner surface between the sealing surface and the gripping portion;
• and
• a fire protection sprinkler having a body defining an inlet and an outlet with a passageway extending between the inlet and the outlet along the longitudinal axis, a deflector supported by the body and spaced from the outlet, the body having an outer encasing surface surrounding the longitudinal axis, the outer encasing surface including a leading portion and a trailing portion for insertion in the second insertion end of the tubular member with the leading portion being received within the sealing surface before the trailing portion engages the gripping portion.