Unfortunately, yard hydrants do not last for a lifetime. They have their due date, and once they have served their time, it's time you replace the yard hydrant. There is no definite way of determining a life service of a yard hydrant, but you can always install the Hydrant Assist Kit. It's a helpful tool that ensures your yard hydrant gives its full potential. Generally, a hydrant assist kit removes direct contact of the soil with the vertical pipe.