Hello Steverino and thank you for your feedback on Home Depot’s website for our Moen 1234 Two-Handle Duralast Cartridge For Two-Handle Bathroom And Kitchen Faucets (Hot Or Cold). Typically, with a new installation damage to the cartridge can occur when sediment or debris broke loose in the water lines during the new installation. As the original purchaser of the Moen centerset bathroom faucet, you could have contacted Moen directly; we would have been happy to troubleshoot the issue and show you we stand by our products. Should you require any warranty or pre-purchase assistance, please feel free to call us at 800-289-6636. Our business hours are 9:00 a.m.-5:30 p.m. Eastern Time Monday through Friday.