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Continue to ChatSwapping between valve types means flipping the internal washer https://cycletechreview.com/2016/accessories/pumps-tools/blackburn-piston-3-floor-pump-review/attachment/_o6a0575/
Swapping between valve types means flipping the internal washer https://cycletechreview.com/2016/accessories/pumps-tools/blackburn-piston-3-floor-pump-review/attachment/_o6a0575/