I have a delta single handle shower faucet and the shower is dripping. How do I change the washer in it?

Please look at image does your faucet looks like this, if it is you can easily replace the cartridge, and delta parts has a life time warranty on their parts, thanks.

John

Sorry I mean the seals

I agree with afaroo, there aren't washers in a single handle faucet. The cartridge is usually user friendly to change. See part #6, it's a diverter repair kit. Looking back at this blowup I may need to eat my words since there seems to be no cartridge in this Delta.

Sorry I mean the seals
What John really meant was "seats and springs",(see image) which can be purchased from Delta as a Repair Kit #RP4993. Good luck, Tom

Is that a late model Delta faucet of older unit ?