How High-Efficiency Systems Can Impact Your Old Cast Iron Drains If you’ve upgraded to a high-efficiency furnace, boiler, or tankless water heater, congratulations! These systems are great for saving energy and lowering your utility bills. But did you know they can also have an unintended impact on your home’s plumbing? Specifically, the acidic condensate these systems produce might be causing problems for older cast iron drains. Let’s break down what’s happening and what you can do to protect your plumbing. What Is Condensate? High-efficiency systems work by extracting as much heat as possible from the [...]