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21727-2 - Fisher Breather Pressure Control 3/8" NPT - OEM
This is a Genuine Fisher OE 21727-2 Pressure Control Breather Cap 3/8" NPT
Western and Fisher use part # 21727-2 for this breather cap and Blizzard and SnowEx use part # 48278.
This is the thread on type. On side to side pumps, this fits right onto the reservoir, but on pumps that are positioned up and down, this cap will thread into elbow # 21726 Click HERE for Elbow.
Alternate Part Numbers: 1-W21727-2, 1-F21727-2, 21727-2, 21727, 48278