I have a single pull knob in my tub to turn on/off the water that is real hard to push/pull. How can I repair/replace this knob? I previously had a maintenance guy come fix this and he used grease to lubricate the knob. It worked fine for maybe one week or so and then became stiff again. Is there another option?

What brand is the faucet?

What brand is the faucet?

Hello. It's a Price Pfister

See this site, then call Price Pfister about replacement cartridge.

Pfister - Warranty Information | Pfister Faucet Warranty (http://www.pfisterfaucets.com/support/warranty.aspx)

It is a Price Pfister. I'm not sure if I am replying in the right spot to your reply

Thank you Harold :)