Called out to complete sold work for removing existing kitchen sink, and faucet and installing a new customer supplied stainless steel drop in sink with a new faucet and redoing the drains below the sink and also to install two toilets in the home. Work was started by shutting off water to the kitchen faucet and removing the connections to the drain and kitchen faucet. Once all connections were removed, cut out old drop in kitchen sink and replaced with a new stainless steel kitchen sink. Allowed approximately four hours for adhesive to set in order to install the Fossett and drains for the new kitchen sink. Once new sink and drains were in place re-introduced water to the system and tested for leaks and functionality. No leaks and everything is functioning properly. Notice that there is a slightly slow drain when you fill both compartments of the sink. Advised homeowner that there could be potentially be a slight clog in the kitchen stack and would recommend getting our drain team out