Fireplace Pilot Assemblies
there are so many different pilot assemblies . type of
pilot Assemblies is depend to Fireplace make and model
the way that some pilot Assemblies are designed it just hold thermopile and sparker this type is called 90 degree Assemblies
and some are holding thermocouple , thermopile , and sparker ( sit Assemblies )
when you push your Gas knob and sparking it at the same time you see the flame on both side !
one Hits your thermocouple and the other side Hits thermopile , and that causes energizing your Gas Control and tells to Let gas flow! and then it fires up !