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The AU-VE-CO PRODUCTS 12209 is a 1/8 inch EPDM rubber vacuum cap used to seal open vacuum ports, nipples, and lines in automotive and light-duty HVAC vacuum systems. The cap blocks airflow at unused ports to maintain system vacuum integrity and prevent vacuum leaks that cause erratic actuator or control operation. EPDM rubber construction provides resistance to heat, ozone, and common shop fluids. These caps are installed by automotive technicians, HVAC service techs, and fleet maintenance professionals during vacuum system service, repairs, or port capping during component testing.
The 12209 vacuum cap fits 1/8 inch vacuum nipples and ports found on vacuum manifolds, intake fittings, solenoids, check valves, and distribution blocks in automotive vacuum control systems. Common applications include capping unused ports on vacuum trees, sealing off disconnected lines during diagnostics, and protecting open fittings during storage or shipping of vacuum system components. This product ships in a pack of 25 units, making it practical for shop stock or service fleet use.
Designed as a general-purpose replacement and service cap for 1/8 inch vacuum ports in automotive vacuum control systems.
Installation requires no special tools - push the cap firmly onto the vacuum nipple until it seats fully against the base. Disable or isolate the vacuum system before capping ports on active circuits to avoid unintended actuator movement. Inspect the nipple for cracks or deformation before installation, as a damaged nipple will prevent a reliable seal. Dispose of any cracked or hardened caps and replace with new units.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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