This essential rubber check valve (also known as a duckbill valve because of its flat, protruding top) can allow liquid or gas to escape back into your pump should it become cracked or damaged. Used to create a tight seal inside of your keg pump, this little keg pump component makes all the difference in how your pump operates.
Don’t waste money replacing the whole pump when you can easily swap out an old or broken Thomas vent for a new one.
