The PROTECH® AP18572 Powered Anode 9.47" Titanium  prevents tank corrosion and acts as a sacrificial material to protect the exposed steel within the water heater tank. Made from durable titanium, this powered anode helps prevent tank degradation by neutralizing corrosive elements, extending the life of your water heater. Its robust design ensures reliable protection, making it ideal for commercial applications where long-term durability is essential.