This is a brand new Rheem/Ruud/Weather King/Corsaire Flow Check Piston Kit. The orifice size is .057.
An orifice / piston is a device with a small hole which allows gas or liquids to flow through at a slow rate. In furnaces, orifices are usually used for regulating pilot and main gas flow. In air conditioning units, orifices regulate the flow of freon.
Replaces Old Part #s:
B1789857 B17898-57 .057
Repair Difficulty Level:
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