All Waukesha® transformers come with fully galvanized radiators as standard. The radiators are corrosion resistant, hot dipped, and manufactured to high quality standards that ensure maximum durability and efficiency. Weld-on and bolt-on configurations are both available. The panels are made of cold, roll-formed steel and heavy gauge. To ensure leak-free performance, the assembled radiators are submerged fully and pressure-tested. The radiator shut-off valves are maintenance free and designed with exclusive triple o-ring construction by SPX Waukesha. Bolt-on radiators come supplied with the valves.