Radiator cap pressure testers measure cap relief pressure and seal conditions on cooling systems and radiators. Kit includes hand pump with gauge, universal cooling system adapters, radiator cap adapters, and blow-molded carrying case to ease transport and to keep items organized.

Cooling system pressure tester kits find internal and external leaks in a vehicle's air conditioning system. These kits come with self-locking quick-disconnecting components and relief valves for pressure release. The pumps in thee kits have large capacity to reduce effort in pressurizing cooling systems.

These adapters test equipment in cooling systems for leaks, including radiators and caps. They are usually make-specific, and sometimes are model specific, depending on the test required. Adapters are sold separately or are part of kits that hook to cooling system testers to determine the health of the vehicles' air conditioning systems.