Apeks Cuff Dump Drysuit Valve The Apeks Cuff Dump is simple one way valve relying on a positive pressure form inside the suit. It can be mounted near either wrist so that when the arm is raised expanding air rises to the highest point of the suit. It is almost maintenance free and needs no adjusting, simply rinse the valve from the inside of the suit every so often to ensure the seat is clear of salt crystals or fluff from your undersuit - The valve is rinsed by flushing freswater through it from the inside of your suit.  The Apeks Cuff Dump is a proven piece of a equipment and is fitted to 100,000\'s of suits to provide easy venting of gas as you make an ascent - It is the simplest method of getting air out of a drysuit or any other item that you may want to fit a one way valve to. Features: Quick venting Extremely low profile Maintenance free -  It is also a good idea to periodically remove the top cover to ensure the one way valve is not becoming cracked which can cause it to leak.