B&G – Replacement K-Seal Tank Gasket for PrimeLine Sprayer Pump Assembly. Â Part #P-268. Do you see a replacement part in the image that you need but you can’t find it by searching? Please take a look at the reference sheet in the second image above to find your part number, or click here to view the same information from the manufacturer’s sales sheet in PDF format (opens a new window). In the image, item is framed in a red box for easy identification. Product may vary from image illustration.