PVC Duct Caps

PVC duct caps are protective coverings made from polyvinyl chloride thermoplastic and designed to fit over the open ends of duct pipes and fittings. Duct caps are engineered to secure and protect ductwork pipes and parts during various phases such as transportation, construction, and maintenance. They are primarily used to protect ends from damage, debris, and contamination from external sources or the environment. By sealing off open ductwork, PVC duct caps ensure that the internal section lines of HVAC and air handling systems remain clean and free of obstructing materials. The caps work by providing a snug and secure fit over the end of a duct pipe or fitting joint. Their design allows for easy application and removal without the need for additional adhesives or fasteners. PVC duct cap fittings are used to maintain system integrity by safeguarding against physical damage and the infiltration of dust, debris, pests, and moisture. This protection is especially important during periods of non-use, construction, or repair when duct systems may be exposed to external conditions.

These are USA made PVC duct caps built by Harrison Machine and Plastic under the trade name SUPERDUCT®, one of the nation’s top manufacturers and brands of thermoplastic ductwork. SUPERDUCT® caps are to be used with air and compatible gaseous media in open air, non-pressurized applications only. They are not for use in pressure systems, with liquids, or with known incompatible chemicals. Always verify chemical compatibility prior to use. 

PVC duct cap sizes range from 3″ to 24″ in Iron Pipe Size (IPS) diameter and have belled end socket ends. For permanent installation, professional PVC primer and solvent cement are recommended for duct caps up to 14″ in size. Hot air welding is recommended for duct caps larger than 14″ in size.

PVC duct caps are manufactured from professional quality PVC material that meets ASTM D1784 standards for product purity, consistency, and lasting service across different applications and project needs. They are precision engineered to exceed various rigorous ASTM testing standards to ensure a high level of performance and reliability for ductwork ventilation systems.

• Material Profile: Type I Grade I PVC Cell Class 12454-B. 
• Color: Dark gray. 
• Performance Standards: Meets and/or exceeds ASTM D testing standards for ductwork applications. 
• Pressure: For non-pressurized systems only. 
• Temperature: Approved for up to 140°F (60°C). 
• Sizing Standard: Schedule 40 / IPS thickness standard. 
• Size Options: Range from 3″ to 24″ in diameter. 
• Connection Options: Belled socket ends. 

Harrison SUPERDUCT® PVC duct caps provide a secure closure to the open ends of duct pipes and fittings while offering the mechanical durability and corrosion resistance for systems handling various industrial fumes, exhausts, gasses, dust, and/or particulates. 

• PVC Material: Heavy duty thermoplastic with excellent corrosion resistance and durability that will not rust or degrade. 
• Chemical Resistance: Resistant to many acids, alkalis, alcohols and their gasses, fumes, and vapors.
• Cap Ends: Built to securely cap off open ends in ductwork pipes and fittings. 
• Hard Working: Engineered for long term service and minimal maintenance to keep ductwork systems operating.
• Airtight: Will provide a secure, long lasting seal when properly installed.
• Easy to Install: Lightweight and impact resistant for easy handling and installation.

Common applications and uses for PVC duct caps include HVAC systems to protect ductwork during construction, transport, or modifications, in industrial settings to seal pipes and ducts in factories or plants where resistance to chemical fumes and temperature are required, in construction sites to keep debris and pests from ducts, and when maintenance or repair is needed and sections of ductwork need to be sealed off during work processes.

Harrison PVC SUPERDUCT® caps are a leading choice in quality and performance, trusted by professionals for decades. They are precision engineered to deliver the reliable, long lasting service that ductwork systems require. Manufactured to the highest standards from premium materials, our ductwork pipe supplies are made to exceed requirements. For more information or details on contractor pricing, contact us.