Attempted to repair lavatory faucet in upstairs guest bathroom. Faucet is very old and unable to be repaired. Client supplied new delta widespread lavatory faucet. We removed the old fixture and drain assembly and installed the new fixture. Also replace service valves with new 1/4 turn stops. During the diagnostics of the dripping faucet we found a quality control issue from previous work that TE completed in relation to the recirculation pump. We corrected this issue under warranty and made sure all required components for code compliance were in proper place. Tested everything was tested for leaks proper function of the system.