Plaza notes
Hard ruleDescription
York S1 025 35388 002 Reversing Valve Els PW 17895 for the pressure sensitive diaphragms to for the pressure sensitive diaphragms to trip accurately at their factory settings The factory installed 12A09 vent limiter (1 8" NPT) eliminates the need for external vent piping in indoor installations by limiting gas escapement in the event of a diaphragm rupture
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