Pressure Tank Well-Rite Online Well-Rite Online tanks are the professional’s choice in the well tank market.  Our innovative Online Union Connection is easier to install and saves time and money. Online has a welded, stainless steel connection. This stainless steel connection is totally lead free, and NSF approved for the highest sanitary standard.  Well-Rite Online tanks are finished with a high quality urethane paint system. Well-Rite Online tanks are designed with a patented  and innovative controlled action diaphragm, which eliminates coatings, liners and plastic bladders.