Au-ve-co Products 12907 Rubber Vacuum Cap 5/16 Inch

Product Description

The AU-VE-CO PRODUCTS 12907 is a rubber vacuum cap designed to seal 5/16-inch vacuum fittings in automotive and light-duty HVAC applications. It provides a secure, airtight termination on open vacuum ports, preventing air leaks that can cause system pressure loss, rough idle, or erratic actuator behavior. The cap is molded from rubber for flexibility and a snug fit over standard barbed or smooth vacuum nipples. Installation requires no tools and takes seconds, making it a practical item for service techs who need a reliable port seal during diagnostics or component replacement.

This cap is used to plug unused or temporarily disabled vacuum lines during service work on automotive HVAC systems, engine vacuum circuits, and related vacuum-operated components. It is appropriate for any shop or field technician working on vehicles or small engine equipment where open vacuum ports need to be capped off cleanly. The 5/16-inch fitting size makes it compatible with common vacuum nipple diameters found across a wide range of automotive and light mechanical applications.

Key Features

• Fits 5/16-inch vacuum fittings for a secure, leak-free seal
• Molded rubber construction provides flexibility and durability
• Tool-free installation - press-fit design seats quickly on standard vacuum nipples
• Seals open vacuum ports to prevent air ingestion and pressure loss
• Lightweight at 0.01 pounds, suitable for carrying multiples in a service kit

Compatibility

Designed as a general-purpose replacement vacuum cap for 5/16-inch vacuum fittings in automotive and light-duty HVAC service applications.

Installation Notes

Installation is performed by automotive or HVAC technicians during vacuum system service or diagnostics. Before capping any vacuum port, ensure the engine or system is off and vacuum pressure has been relieved. Press the cap firmly over the fitting until fully seated. Inspect the cap for cracks or deformation before reuse, as damaged rubber can allow air ingestion and affect system performance.