If you’ve noticed that your hot water system is leaking water, it’s a good idea to identify the cause as soon as possible. Often, hot water system leaks are caused by minor issues, though in some cases you’ll need to get a qualified plumber to repair or replace your unit. Common Causes of Water Heater Leaks Why do hot water systems leak? There are plenty of potential causes – the most common ones include: The age of your water heater Holes in the tank or pipes A loose drain valve Excess pressure in the tank The best way to avoid hot water system leaks in the first place is to have your unit