Why Is Warm Water Coming Out of the Cold Tap?

Why Is Warm Water Coming Out of the Cold Tap?

You’re not alone if you’ve ever turned on the cold tap only to have warm or lukewarm water coming out. Many people experience this phenomenon, and it can be frustrating and confusing!

Let’s explore some common causes of warm water coming out of the cold tap and provide tips for addressing the issue.

Cross-Connection Between Hot and Cold Water Lines

One possible explanation for warm water coming out of the cold tap is a cross-connection between the hot and cold water pipes. This cross-connection can occur when the two pipes are too close, transferring heat from the hot water pipe to the cold water pipe. This transfer can happen in various ways, such as through faulty plumbing connections or poor insulation. To address this issue, a plumber can install a special device called a “check valve” to prevent hot water from flowing into the cold water line.

Hot Water Tank Is Too Close to the Cold Water Inlet

Another potential cause of warm water flowing from the cold tap is that the hot water storage tank may be too close to the cold water inlet. The surrounding hot water can heat the cold water entering the tank, leading to warm water coming out of the cold tap. You can resolve this issue by moving the hot water tank away from the cold water inlet.

Corrosion or Buildup in Pipes

Over time, corrosion or buildup can occur in pipes, affecting the temperature of the water coming out of your taps. If your pipes are old or in poor condition, this could be the cause of warm water coming from the cold tap. In this case, replacing the affected pipes may be necessary to remedy the issue.

Issues With the Water Heater

Finally, warm water from the cold tap could indicate a problem with your water heater. This rule is especially true if you have a tankless water heater, which heats water on demand. If your heater isn’t functioning properly, it may send warm water into the cold line. If you suspect a problem with your water heater, it’s important to have it inspected and repaired by a qualified professional.

Warm water coming out of the cold tap can be from various issues, but thankfully, all of them are solvable! If you’re experiencing this problem, it’s best to consult a licensed plumber to diagnose it. By getting to the root of the problem, you’ll be able to enjoy cold water from your taps once again.

At Fletcher’s Plumbing and Contracting, we offer home water treatment in Northern California for all your plumbing needs. Whether you need a water heater repair or advice on addressing warm water coming out of the cold tap, our team is here to help. Contact us today to learn more!