Ken writes
The Leather Cup (part# NP-271) goes inside of the Pump Cylinder. You can see the exploded view diagram of the B&G sprayer by clicking on this link B&G Sprayer product label. Scroll down to page 2 and the part you are asking about is #13 (NP-277 or NP-271) on the diagram. http://www.domyownpestcontrol.com/msds/PrimeLineSprayers.pdf
Answer last updated on: 03/11/2011