New age of faucet repair parts

I was lucky because I saved the box the faucet came in and it had the model number. If I didn't, you're right it would have been much harder!

Sue(tm) Lead me not into temptation... I can find it myself!

What brand do you have? Moen has only one cartridge that will fit every kitchen faucet they make and it is readily available in Home Depot or my local hardware store.

You make a good point and it is worth checking before you buy a new model. I'd hate to have to wait days, or even weeks, for a factory part.

I took a Delta cartridge to my Local HD, showed it to the guy, and he just gave me an exact new replacement (in exchange for the old one) with no charge, and no asking for receipt. Since these units are guaranteed for life, they don't really care, as long as they carry that brand. They usually get a stock of replacement supplies from the manufacturer,. and they can trade the defective parts for new replacements themselves. It usually depends on the staff.. If they feel like teeing you off, they will ask for a receipt, otherwise, they don't care.