Customer had a two handle wall mount kitchen faucet they wanted installed. It was thought that sink would have to be removed for installation. Removed old faucet and found mounted fittings on wall behind faucet that would allow faucet installation without removing sink. Cleaned mounting holes to the best of our abilities but some of the rust stains are permanent. Installed customer supplied kitchen faucet. Provided and installed new undersink waste fittings and air admittance vent. Tested all for leaks and proper function.