*PLUMBERSSTOCK EXPERT* responded:
Good day! Yes, the white cap on the end of this Moen 150259 Hose Kit is removable. The cap is designed to protect the brass nipple from scratches while it is being shipped. If you are referring to the black O-ring located on the brass nipple (at the end of the hose), unfortunately, Moen does not have a service kit available just for that part. According to them, you would need to replace the entire hose. However, if you're faucet is still covered under a warranty, the replacement parts needed to repair the fixture can be provided free of charge. It is best to contact the manufacturer at 1-800-289-6636 to know if you're faucet is still covered by a warranty or not. If it is not, you can purchase this Moen 150259 hose kit by clicking on Add to Cart and entering your zip code for shipping. Thank you for choosing PlumbersStock.com!