Perko Guides Replacement Gas Cap Choices
November 17, 2014 9:51 am
During the heat of the day, a boat's fuel tank can warm and the liquid within it expand. This built-up pressure used to be vented off through fittings. But in 2011, the US Environmental Protection Agency (EPA) mandated that fuel systems on new boats be sealed to protect air quality from hydrocarbon emissions. Perko has responded with its full line of EPA-compliant, replacement sealed gas caps with built-in vacuum over pressure relief (VOPR), each proudly made in the USA.
Whether it falls overboard at the fuel dock or has simply lost its lustrous shine, it's important for boat owners to know what type of system they have to correctly select the proper cap. The company's packaging makes selecting the right model easy: blue is for pre-2011 vented systems and green is for post-2011 sealed designs.
Using the wrong cap can be dangerous to both the boater and the environment. A sealed version on a vented system may cause a tank to over-pressurize and create a hazardous condition. Conversely, a vented unit on a sealed design will defeat the EPA regulations and allow harmful fuel vapors into the atmosphere. Owners who are unsure of what they have should consult a marine fuel system professional or their boat builder before changing the fuel cap.
Perko offers a wide variety of replacement caps to fit any boat style. Options include chrome-plated bronze, black or white polymer, and stainless steel models with the new international color-coded inserts. An owner can easily find a model that will enhance the look of his boat. Matching water, waste and diesel versions are available.
Perko's website features an episode of Ship Shape TV that helps educate boaters on sealed vs. vented caps at http://www.perko.com/sstv_video/sstv_perko_gas_caps/. Perko's replacement gas caps start at around $30 for plastic models and $60 for metal versions.
For over 100 years, Perko has provided the marine industry with a line of parts and accessories of the highest quality. Since its first fuel filter manufactured in 1936, the company has been a leader in fuel system components. Now, more than ever, boaters can rely on Perko to safely comply with regulations on diurnal emissions.