Thank you for your question, and I am sorry to hear that you are experiencing an issue with your Delta faucet. The ball assembly is RP70. The RP50587 valve cartridge assembly will not replace these parts. If you should need further assistance, please contact our Delta Customer Service line at (800)345-3358. We are available Monday-Friday, 7am-7pm, CST and Saturday, 8am-5pm, CST. You may also email at firstname.lastname@example.org.
Date published: 2018-08-18