The faucets of hot and cold water from the shower are leaking, I replaced the delta cartridges, put new springs and seats of rubber with no result.

1. Make sure the springs are placed with the correct side inside the cup washer
2. Tighten up the collar nut a bit more - or keep tightening until the drip stops ( remove shower head before you start tightening )

See if that helps

Milo

Please tell us the model number of your faucet, also Delta products has good warranty they can send you parts for free, Thanks.

John