Descaling Made Easy: A Comprehensive Guide to Using the Eccotemp EZ-Flush System Descaler Kit

by Eccotemp Canada

Tankless water heaters, unlike traditional tank-style ones, don’t store preheated water. They heat cold water rapidly on demand, offering energy efficiency and space savings. However, their efficient design makes them prone to limescale buildup. With water in contact longer with the heating elements, minerals can accumulate, affecting performance.

Water scale, lime, or rust deposits within water-based equipment can significantly hinder efficiency and potentially damage your water heater. Descaling is crucial for tankless water heaters to combat scale buildup, preserving efficiency and longevity.

The Significance of Descaling Tankless Water Heaters and Its Purpose

Tankless water heaters are a fantastic choice, offering instant and limitless hot water precisely when and where you need it. Their efficiency surpasses that of traditional water heaters. However, here's a critical insight: regular servicing is paramount to maintaining optimal efficiency.

To achieve peak performance, it's recommended to clean tankless water heaters at least twice a year. This preventive measure helps prevent corrosion and sediment buildup, ensuring uninterrupted efficiency. As water flows through the system, it has the potential to create calcium and hard water deposits, leading to reduced flow and efficiency.

Regular descaling is essential to prevent costly repairs caused by limescale blockages, whether DIY or professional, ensuring uninterrupted heater function. Eccotemp’s EZ-Flush System Descaler Kit aims to eliminate these deposits effectively, so your tankless water heater continues to provide hot water efficiently for an extended period.

How to Use the Eccotemp EZ-Flush System Descaler Kit?

Using the EZ-Flush System Descaler Kit is a straightforward process, making it accessible for both seasoned DIY enthusiasts and those new to home maintenance. Here's a step-by-step guide:

1. Make sure to turn off the water heater

Turn it off by unplugging it or by your breaker.

2. Verify Service Valve Kit

Ensure a service valve kit is attached to the ends of your water heater's inlet and outlet pipes. This enables you to shut off water flow and connect the EZ-Flush hoses easily.

3. Turn Off Water Supply

Close the blue-marked (cold) incoming water valve on your service valve kit. Release pressure and drain the tankless water heater using the temperature and pressure valve. After draining, turn off the red-marked (hot) outgoing water valve on the service valve kit.

4. Plug in the EZ-Flush Hoses

Remove service valve kit caps and attach EZ-Flush hoses (2 5-Foot Rubber Hoses). Connect the kit's bottom hose to the BLUE inlet and the top hose to the RED outlet on the service valve.

5. Pour in Water and Solution

Pour cleaning solution and a gallon (or less) of water into the EZ-Flush Kit. Plug it in, start it, and ensure water circulates visibly. Maintain the EZ-Flush at least half full. Run it for 30-45 minutes for a thorough flush.

6. Turn off and Release Pressure

Once completed, turn off the EZ-Flush then drain and release pressure using the T & P valve on your tankless water heater. Note: Pressure might persist when detaching hoses from your service valve kit.

7. Disconnect EZ-Flush Hoses

Remove hoses from the tankless water heater, starting with the RED outlet, then the BLUE inlet. Tighten the caps on the service valve kits securely.

8. Turn on Water Supply

Turn on incoming and outgoing water back in the open position on your service valve kit.

9. Turn Water Heater Power On

Check for any leaks from the water heater. If all is dry, restore power and resume regular use.

10. Turn Off and Purge

Empty the remaining water and solution from the EZ-Flush Kit. Refill it with a gallon of fresh water. Run the EZ kit for 10-15 seconds to flush out any residual solution in the pump. *Do not allow the kit to run dry.

11. Store EZ-Flush Safely

After 10-15 seconds of water flow, turn off the kit and ensure all connections are dry. Store it in a dry, safe place for future use.

Additional Applications

Expand the utility of the EZ-Flush System Descaler Kit beyond water heaters to include ice machines, humidifiers, heat exchangers, evaporators, and similar equipment reliant on water flow. This versatility makes it an ideal solution for maintaining any system that utilizes water circulation. Its adaptability makes it a go-to choose for a wide range of equipment, ensuring a thorough and effective cleaning process.


The Eccotemp’s EZ-Flush System Descaler Kit is a valuable tool for every homeowner looking to maintain the efficiency and longevity of their water heater or any water-using appliances. By understanding its purpose and practical uses, you can seamlessly integrate descaling into your regular home maintenance routine, ensuring that your appliances continue to operate at peak performance. Make descaling a breeze with Eccotemp, and enjoy the benefits of a cleaner, well-maintained home, and more efficient water heating system.