What Is The “Cold Water Sandwich” Effect?

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Cold Water Sandwich Effect - Cool Blew Inc.If you own a tankless water heater, you have probably experienced what is best described as a “cold water sandwich”.

This phenomenon occurs when you step in the shower with warm water flowing only to be shocked when cold water blasts out of the faucet. The cold blast only lasts a second or two and is followed by warm water again. If this has happened to you, you may wonder why.

The Cold Water Sandwich Effect

What Is Going On?

Tankless water heaters are designed to heat water as it flows from the pipes to the user. This is a great way to save on your electric or gas bill, but there is one downside. The water that enters the heater en route to your faucet is cold. The heater remains off until you turn on the hot water. At this point the heater turns on and begins warming the water as it heads to your faucet.

Gas powered tankless heaters have fewer incidents of the “cold water sandwich” because gas heats instantly and therefore can heat the water quickly. Electric tankless water heaters rely on coils to heat the water and these coils take time to heat up. This is similar to the difference between a gas and electric stove.

How To Fix It?

While this is a perfectly normal occurrence, there are ways to fix the problem if you just can’t live with it. The most common option is to replace your older model tankless heater with a newer model. Newer models feature extra components that store hot water in case you turn off the faucet and immediately need hot water again. Others have created heating elements that work to remedy the situation.

Experience In Tankless Water Heaters

While the “cold water sandwich” effect is completely normal, no one likes to be blasted with cold water in the midst of his or her hot shower.

We have the experience needed in dealing with tankless water heaters.

Call Now To Speak With An Expert About Solutions To This & Other Plumbing Problems!