Pentair’s MASTERTEMP® ASME® certified commercial heater has been improved with a new bronze header design that allows for easy access to the thermal regulator and bypass valve for easy servicing without use of special tools. Additionally, all internal components of the bronze header are now plastic for lightweight, corrosion-resistance. Upgrades have also been made to the thermal regulator including a governing stainless steel sleeve for better wear protection. Plus a new, fuller pre-mixed system with highly efficient air and gas mixture allows for faster heat up times. Certified for low NOx emissions, this eco-friendly, energy-efficient heater will save energy, conserve water and meet the demands of commercial aquatic facilities.