Great alternative from the staigh values that usually come stock on Camelbaks. I cut the hose right below the stock valuse. Use a lighter or gas stove to heat the end lightly; warm the plastic I should say. Be careful not to allow the hose to touch the flame it will burn the plastic and you will have to start over. I usually just take a lighter and rotate the hose over the flame. Key is to place the valve on when the plastic is still warm. To quickly harden the plastic for a great seal; i submere it in a cup of ice water. Make the plastic harden around the valve.