Dorman Aluminum A/C Line Block-Off for 3/8" Line — Corrosion-Resistant, Quick-Install

If a section of your vehicle's A/C line is damaged or being replaced, the Dorman 800-993 provides a fast, cost-effective way to isolate and seal a 3/8-inch line without replacing the entire assembly. Built from sturdy aluminum and engineered to resist rust, this block-off helps restore proper airflow and maintain system integrity while you complete repairs or perform temporary isolation during service.

How does this block-off save time and money during A/C repairs?

Rather than removing or replacing full line assemblies, the Dorman 800-993 lets you close off only the damaged portion. That reduces parts cost and labor hours, and limits the amount of refrigerant and oil that must be handled.

• Installs quickly to isolate a damaged 3/8" line section
• Avoids full-line replacement when only one segment is compromised
• Reduces time spent evacuating and recharging refrigerant
• Compatible with common A/C repair workflows and kits

What materials and construction features ensure long-term sealing?

Manufactured from corrosion-resistant aluminum, the 800-993 resists rust and environmental wear that can compromise other fittings. Precision machining delivers a secure fit to minimize the risk of leaks under normal operating conditions.

• Sturdy aluminum body for rust resistance and durability
• Engineered tolerances for a tight, leak-minimizing seal
• Designed for vehicle service environments and repeated handling

Is the block-off easy to install for DIYers and technicians?

The unit is designed for straightforward installation so both professional mechanics and capable DIYers can fit it without specialized factory tooling. Instructions and typical repair practices make it simple to integrate with common A/C line repair kits.

• Simple installation steps compatible with standard shop tools
• Saves labor compared with routing and fitting full assemblies
• Works as a standalone part or as part of Dorman's A/C Line Repair Kit

Will this part fit my vehicle’s system and when should I use it?

This block-off is intended specifically for 3/8-inch A/C line applications; verify line diameter and service requirements before installation. Use it to isolate damaged runs, create temporary seals during component swaps, or as part of a staged repair to limit replacement scope.

• Designed for 3/8" automotive A/C lines—confirm size before purchasing
• Ideal for emergency isolation, staged repairs, and targeted replacements
• Backed by Dorman engineering and quality-control processes in the U.S.

Who is this for: Professional mechanics, independent shops, and experienced DIYers who want a durable, cost-effective solution to seal a damaged 3/8-inch automotive A/C line. If you need to limit repair scope, reduce labor and parts cost, or temporarily isolate a section during service, the Dorman 800-993 offers a practical, corrosion-resistant option supported by factory-level engineering and quality control.

• Features: Save time and money by repairing only the damaged section, easy to install, sturdy aluminum construction.
• Availability: Sold individually and also included in Dorman's A/C Line Repair Kit options.
• Support: Backed by Dorman's team of engineers and quality control specialists in the United States.