The Gas Tankless with X3^® Scale Prevention Technology has been tested in various locations around North America, including Roswell, New Mexico, an area with some of the hardest water in the country, to ensure its performance can hold up in the harshest water conditions.

Yes, our tankless models with X3^® Scale Prevention Technology are capable of being used with a recirculation pump when a cross-over valve is used. Cross-over valve sold separately.

Residential single-family applications with hard water concerns. Hard water is everywhere. In fact, more than 85% of American homes have hard water which adversely affects plumbing systems, including water piping, water fixtures and the water heating system.

No, currently the 540X3, 340X3 and 240X3 models are designed for use in residential single-family applications where Easy-Link™ is not required.

Based on our research, stainless steel and copper heat exchangers fail at the same rate due to scale build up. That’s why it’s important to install a State tankless model with X3^® Scale Prevention Technology.

Because this is our standard condensing gas tankless model that you’re already used to, they are compatible only with 3” or 4” venting. As long as the gas line is sized appropriately for the BTUs, ½" gas lines can be used based on national fuel gas codes or applicable local gas codes or as outlined in the instruction manual.

The 340X3 and 240X3 models will come standard with a pressure relief valve. The 540X3 does not currently include a pressure relief valve.