ICEBREAKER freeze-proof wall hydrants from Arrowhead Brass offer an extra layer of protection during winter months, the company notes. If water remains in the hydrant or a hose is left connected during freezing temperatures, the ICEBREAKER’s patented venting system will burst, allowing the freezing water and ice to escape the hydrant outside the walls of the structure, keeping the interior portion of the hydrant from bursting and causing thousands of dollars of damage. If bursting occurs, the ICEBREAKER vent cap is easily replaceable and can even be used to upgrade existing Arrowhead Brass 420 series frost proof hydrants.