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Preventing Scale Build up in your Tankless Hot Water Heater

Preventing Scale Build up in your Tankless Hot Water Heater

When it comes to tankless hot water heaters, preventing scale build-up is crucial for maintaining their efficiency and longevity.

Scale build-up occurs when minerals and other impurities in the water accumulate on the heating element surfaces, impeding heat transfer and potentially causing damage to the unit.

To combat this issue, scale prevention filters like the EWS Heater Guard have been developed.

In this article, we will delve into the detrimental effects of scale build-up on tankless water heaters, discuss the features and benefits of the EWS Heater Guard, and provide comprehensive information about this innovative solution.


Tankless Hot Water Heater

Preventing Scale Build up in your Tankless Hot Water Heater

Scale build-up in tankless hot water heaters can have various negative consequences.

Firstly, it reduces the efficiency of the heating system by creating an insulating layer on the heating element surfaces.

This insulation impedes heat transfer, making the heater work harder and consume more energy to achieve the desired water temperature.

Consequently, scale build-up leads to increased energy costs and decreased overall performance of the water heater.

Furthermore, scale build-up can also cause damage to the heating elements themselves.

The accumulation of minerals and sediment can create hot spots on the heating surfaces, leading to overheating and potentially resulting in the failure of the unit.

Additionally, scale build-up restricts the flow of water through the system, leading to reduced water pressure and flow rate.


Tankless Hot Water Heater

The EWS Heater Guard: Scale Prevention Filters

The EWS Heater Guard is a highly effective scale prevention filter specifically designed for tankless hot water heaters.

With its advanced features and benefits, this product ensures the optimal performance and longevity of your water heater.


  1. 5 Micron Pre-Sediment Filter: The EWS Heater Guard is equipped with a 5-micron pre-sediment filter that effectively removes sediment and particulate matter from the water. This filtration process ensures cleaner water enters the tankless hot water heater, reducing the chances of scale formation.
  2. FDA-Approved Food-Grade Polyphosphate: The EWS Heater Guard utilizes 100% FDA-approved food-grade polyphosphate as a scale inhibitor. Polyphosphate forms a protective coating on the heating element surfaces, preventing scale formation and reducing the impact of existing scale.
  3. Reversible Flow: The EWS Heater Guard is designed to accommodate any installation configuration with its reversible flow capability. This flexibility allows for easy integration into your existing plumbing system.
  4. Compatible with City Water or Well Water: Whether you receive your water supply from a municipal source or a well, the EWS Heater Guard is suitable for both. It effectively protects against scale build-up, regardless of the water source.


  1. World-Class EWS Quality and Performance: The EWS Heater Guard is manufactured to the highest standards, ensuring exceptional quality and performance. With its advanced filtration and scale prevention capabilities, it offers reliable protection for your tankless hot water heater.
  2. Easy Maintenance: By reducing scale formation on the heating element surfaces, the EWS Heater Guard makes your water heater easier to maintain. Regular cleaning and descaling become less frequent, saving you time and effort.
  3. Quick and Easy Installation: The EWS Heater Guard comes completely assembled, making installation a breeze. With its user-friendly design, you can have it up and running in no time.
  4. Compliance and Safety: The EWS Heater Guard meets or exceeds all necessary compliances and safety regulations, providing peace of mind for homeowners. You can trust its performance and reliability.
  5. Made in the USA: The EWS Heater Guard is proudly manufactured in the USA, ensuring superior quality control and supporting local businesses.


Tankless Hot Water Heater Scale prevention

Frequently Asked Questions (FAQs)

Q: How often should I replace the filter in the EWS Heater Guard?

A: The frequency of filter replacement depends on the water quality and usage. As a general guideline, it is recommended to replace the filter every 6 to 12 months for optimal performance.  Check out our Subscribe and Save section to receive replacement filters at your desired timetable at a discount.  

Q: Can the EWS Heater Guard be installed by a homeowner, or is professional installation required?

A: The EWS Heater Guard is designed for easy installation and can be installed by a homeowner. However, if you are unsure or uncomfortable with the installation process, it is advisable to seek professional assistance.  Check out our How To article on how to install the EWS Heater Gaurd

Q: Will the EWS Heater Guard work with my specific tankless hot water heater model?

A: Yes, the EWS Heater Guard is compatible with most tankless hot water heater models. The Heater Guard comes in 2 sizes 3/4 inch and 1.5 inch to support multiple water line sizes in homes and commercial property.

Q: Can the EWS Heater Guard completely eliminate existing scale in my tankless water heater?

A: While the EWS Heater Guard is highly effective at preventing scale formation, it is not designed to remove existing scale. However, it can help reduce the impact of existing scale and prevent further accumulation.

Q: Is the polyphosphate used in the EWS Heater Guard safe for drinking water?

A: Yes, the polyphosphate used in the EWS Heater Guard is 100% FDA-approved food-grade polyphosphate, making it safe for drinking water and complying with all relevant regulations.

Q: Does the EWS Heater Guard require any ongoing maintenance?

A: The EWS Heater Guard is designed to be low-maintenance. However, periodic filter replacement is recommended to ensure optimal performance and scale prevention.

Preventing scale build-up is essential for maintaining the efficiency and longevity of your tankless hot water heater. Scale not only reduces performance and increases energy costs but can also lead to damage and system failure.

With the EWS Heater Guard you can effectively prevent scale formation, reduce sediment, and ensure the optimal performance of your water heater. Its advanced features, world-class quality, and ease of installation make it an excellent investment for homeowners.

Keep your tankless hot water heater clean, efficient, and hassle-free with the EWS Heater Guard.

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