Hi, AmyR!.
Thank you for your question, and I am sorry to hear that you are experiencing an issue with your Delta 3555-MPU-DST faucet. The end valve is not a replaceable part. To better assist you with this, 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 customerservice@deltafaucet.com.
Best Regards,
Rosanna
Answered by: DeltaFaucet11
Date published: 2018-10-04