the good news is..the life time warranty works. after 20+ years of service..the faucet worked but the finish wore off... it has been replaced by the Marielle oiled finish.
when the h20 flow is low..it diminishes to off. all the time. it is a cartridge issue  that i just called the co to replace. no problem !   Excellent co. 
My husbands business is "Mr Fixit". he recommends  Price Pfister.