Clean Water Heaters are ideal for heating municipal water for industrial washing and rinsing processes. Sturdy 0.475\" diameter copper sheath elements provide superior strength and rigidity. Chromalox elements utilize high quality resistance wire for coil construction. All stock and assembly stock heaters come with mechanical AR thermostats. These thermostats are suitable for most applications. Explosion-resistant and liquid-tight thermostats are provided on E2/E3 and E4 units, respectively. Other applications include indirect heating of viscous liquids and temperature maintenance of storage tanks.