Had to go under sink and tight faucet as well as the mixing valve to handle. I also gave them a free zero charge service and tested their water pressure to the home. Also checked temperature in faucet. it was able to get warm pretty fast because they already have a research pump located on the heater.. I checked there expansion tank for a safety check and it was still good and functioning. Customer seem to be satisfied with the knowledge I gave them and the work that was performed.