From Google
Steven Kakaty
Do not recommend. J2 installed a Navian tankless hot water heater and, due to the installation, its been nothing but problems ever since. For starters, the installer didnt use copper fittings which caused a gas leak in our house and National Grid had to cut our gas off. We have another plumber fixing their mistakes. Do not recommend. Update: we're going to have to have the tankless water heater torn out and reinstalled correctly by professionals. We are so upset! Please do not use this company.