An HDPE duct spacer is a component used in underground ducting systems to maintain the required separation between ducts. These spacers are made from high-density polyethylene (HDPE), a robust and durable thermoplastic material known for its resistance to chemicals, environmental factors, and wear and tear. The primary function of an HDPE duct spacer is to prevent the ducts from shifting, collapsing, or touching each other, which could potentially lead to damage, reduced efficiency, or failure of the system.