Can you lubricate Pfister cartridges - when the handle is hard to turn?

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AP1

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Is it possible to lubricate Pfister faucets/cartridges? I've done that for years with Moen cartridges -- turn water valves off, pull the cartridge out, remove the center shaft, lube the o-rings with silicone grease, reinstall, good as new. It's much more economical than buying a new valve every time the faucet handle become stiff or difficult to turn.

Can I do the same thing with Pfister faucets (bathroom, tub, kitchen)? If so, what parts do I lube and how do I access them?

My immediate need is for our Pfister tub faucets. The handles are very stiff and hard to turn. The faucets use a 28000-0100 cartridge (based on the tag under the faucet handle), which I'm 99% sure has been replaced by the 974-0420.

It's surprising I can't find videos online of lubricating Pfister faucet cartridges.

I look forward to your reply.

price_phister_974-042.jpg
 

Jadnashua

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You can try putting some silicone grease on the O-rings, and it might last awhile unless they're damaged. Otherwise, it's replace the cartridge time.
 

AP1

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You can try putting some silicone grease on the O-rings, and it might last awhile unless they're damaged. Otherwise, it's replace the cartridge time.
Thanks. Are you referring to the two oval o-rings on the back of the cartridge (opposite the handle side)?
 

AP1

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Thanks for the video and photos. They help validate the ones I've seen online. From your reply, do I assume correctly that there's nothing to access or lube INSIDE the cartridge (like there is with Moen cartridges)?
 
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