We installed 2-50 gallon water heaters in parallel, ensuring both proper venting and gas connections. We also thoroughly tested the water piping and insured it to be leak free.We also replaced the thermal expansion tank and securely bracket it as well. Isolation valves were added for each heater to facilitate any future maintenance as well. We reconnected the recirculation line and re-energize the pump as too. Additionally we also replaced the garbage disposal air switch the customer preferred a different finish, which we sourced it will arrive Friday and we will return Monday to install it. Finally, we advised the customer about annual water heater maintenance, that will ensure longevity and optimal performance of the water heaters.