The Stant Fuel Cap Tester adapter makes it quick and easy to accurately test fuel caps for leaks. These products have been developed to test fuel caps for compliance with current EPA regulations. Using these tools will help speed the test procedure, enabling you to accurately test more cars per day. The use of these tools is very important in emission tune-up facilities. Stant is a world leader in the development and manufacture of fuel and cooling system products. Founded in Connersville, Indiana by George Stant in 1898, today the company is still based in Connersville, but is now owned by HIG Capital LLC. Stant designs and produces a variety of consumer products including thermostats, radiator and coolant reservoir caps. The majority of Stant consumer products are manufactured in the USA in TS16949/ISO14001 certified facilities.