Universals don't have "mixing elbows" usually, unlike Yanmars. In most cases there are what are called exhaust risers
, which are simply sections of pipes and elbows bolted to the end of the manifold with a flange. The gases go through the pipe to the muffler
and a nipple is on the pipe near the muffler
to inject the water
from the HX.
Universal did/does make a mixing elbow
, but I haven't seen a lot of them, although one or two particular Catalina
models, for example, used them because of space restraints.