Raypak 53/53A/55A/105A/151/153/155A Orifice [LP] [MV] (003902F) switches That makes the union design

That makes the union design especially practical for long-term system upkeep

not like it was forced into place simply because the size seemed close

It is often replaced when the original grid fabric is torn

and 185A models

Raypak 53/53A/55A/105A/151/153/155A Orifice [LP] [MV] (003902F) switches That makes the union designThe Raypak burner orifice is designed for compatible 53, 53A, 55A, 105A, 151, 153, and 155A heater applications using LP gas in an MV configuration. A burner orifice is useful because it helps meter the gas flow correctly for the supported fuel type, supporting cleaner burner performance and more dependable heater operation. This replacement is especially useful when the original orifice is clogged, damaged, or no longer matched to the supported LP