The Hardless NG4 is an all-in-one whole-house water filter and conditioner that connects to the main water entrance of your home. It gives you the benefits of removing the hardness...
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Water Filter

The Hardless NG4 is an all-in-one whole-house water filter and conditioner that connects to the main water entrance of your home. It gives you the benefits of removing the hardness in your water while lowering chlorine, sediment, bacteria, and other impurities levels all in one small compact unit. This water filter will supply you with clean water from every tap in your house. The water you brush your teeth with, shower with, and drink, will all be high-quality water.

The filter is made in Israel, a country that is known for having the latest developments in water technology.

Hardless NG4

Features And Benefits

  • Ready to install with our proprietary slow phos and KDF cartridge
  • Reduces limescale buildup in plumbing and water appliances
  • Reduces hard water spots on shower doors, countertops, and more
  • Reduces chlorine, sediment, bacteria, and other impurities levels
  • Leaves in beneficial and necessary minerals
  • Enjoy softer skin, hair, and laundry
  • Does not use salt or electricity
  • Does not waste water
  • Low cost and low maintenance
  • Compact design
Hardless NG4 What's In The Box
Hardless NG4 Parts

How Does It Work?

The water is filtered through a microfilter made of stainless steel and a cartridge containing slow phos and KDF. The stainless steel filter filters out sediment and debris while the slow phos crystals change the structure of the minerals to reduce limescale buildup and keep your pipes clean. The KDF reduces chlorine, iron, heavy metals, bacteria buildup, and more.
The slow phos crystals are manufactured in the United States and are certified with NSF 42.
The KDF is manufactured in the United States and is certified with NSF/ANSI 61.
*It is important to note that the Hardless NG4 is meant for municipal water only. It is not meant for water that is considered to be microbiologically unsafe.

Frequently Asked Questions

  • How do I replace the cartridge?

    Below are the steps. Please also take a look at the Hardless NG4/NG4L User Manual
    1. Turn off the main water supply.
    2. Open the valve at the bottom of the filter to release pressure and drain the water.
    3. Open the filter with your hands or by using the auxiliary key. Turn clockwise.
    4. Pull up on the water conditioning cartridge.
    5. Separate the stainless steel filter (orange) from the water conditioning cartridge.
    6. Replace the old cartridge with a new one and connect it to the stainless steel filter.
    7. Place securely into the filter body.
    8. Screw on the filter top and tighten it with the auxiliary key. Do not over-tighten.
    9. Close the valve at the bottom.
    10. Slowly turn on the main water and check for leaks.

  • How does the NG4/NG4L reduce limescale (or help with the problems caused by hard water)?

    The scale in our drinking water consists of calcium ions, magnesium, and hydrocarbon ions (bicarbonate), which are actually good minerals for you and provide some of the necessary minerals for the human body-especially calcium and magnesium. But the same minerals that are good for you, form a scale buildup in your pipes, on heating elements, and in your water appliances, especially in the process of heating water- a process that accelerates the settling of limescale.
    Unlike water softeners, which use salt to remove the minerals and replace those minerals with salt ions, the Hardless NG4/NG4L modifies the crystalline structure of the minerals in order to reduce the problems that are caused by hard water but leaves them in the water because they are healthy to drink.

  • How do we save electricity and money?

    When the scale sticks to a heating element it forms an insulating layer. Heating time increases and as a result, so do your electricity costs. Additional damage is caused to your pipes, which become clogged to the point where not as much water can pass through and can eventually crack causing a major leak in your home. By installing a Hardless NG4 filter, you will extend the life of any heating elements and of your pipes.

  • Does the filter have any type of certification?

    The NG4/NG4L is approved by the Israeli Standards Institute Standard No. 1505.
    The slow phos crystals have NSF 41 for use with drinking water.
    **(These certifications will be found under the name Amiad Compact and Amiad Alpha)
    The KDF is WQA tested and certified to NSF/ANSI 61.

  • What types of appliances will the NG4/NG4L protect?

    Water heater, washing machine, dishwasher, coffee machine, water pipes, faucets, shower heads, gaskets in toilets or anywhere where water passes and scale can settle.

  • Do the filters filter scale?

    The NG4 and NG4L treat scale and filter the water from particles. The 50-micron mesh filter is designed to stop dirt and particles (sand, small stones, rust) that reach the domestic water infrastructure. The slow phos cartridge takes care of reducing the limescale buildup that occurs in your pipes and water appliances.

  • What is the advantage of installing a filter at the entrance to the house as opposed to installing it before a single device?

    Although some people do install the unit right before the water heater, when installed at the entrance to the house the filter can take care of all your plumbing, faucets, and water appliances without having to buy separate filters.

  • What are you looking for in a water filter?

    As part of our concern for our quality of life, we want to have good water quality in our home. When choosing a water filter, we need to think about what is important to us; Are we looking for something that will remove everything from the water such as a reverse osmosis system? Do we want to treat the water from just one tap in the house or from all the taps? Is it important that there be less limescale buildup in our water appliances and pipes? Is the unit we are using reliable? The NG4 and NG4L are manufactured in Israel by Amiad, a company well known for its advances in the technology of water filtration. It also will reduce limescale buildup in your pipes and water appliances saving energy, water (no backwash), and unnecessary expenses. It is designed to serve the whole house and not just one specific tap.

  • If I have the NG4 can I upgrade to the NG4L?

    Yes. This can be done by purchasing the conversion kit and can be done by yourself. It is important to note that if you are considering this, you should be sure to leave enough space when installing your unit. The NG4L is 6 inches longer than the NG4.

  • What type of maintenance does the filter need?

    All that is needed is to replace the water conditioning cartridge about every 6 months and at that time to clean the mesh filter. This maintenance can be done by yourself.
    In areas that have high amounts of debris or sediment in the water, you may need to clean the stainless steel filter more often.

  • What kind of water can the filter be used with?

    The Hardless NG4 should be used with municipal water only. It is not meant for water that is microbiologically unsafe to drink. It can only be used with well water if it is already potable or if the water has been through a chlorination process.

  • Can the filter be installed at different angles?

    The filter can be installed at different angles but we do recommend installing it vertically with the bottom part facing downwards.

  • Where is the best place to install the filter?

    The best place to install the filter is at the main water entrance to the house or on a cold water line.

  • Is the Hardless NG4/NG4L environmentally friendly?

    Absolutely yes!
    There is no wasted water and no salt.
    Reverse osmosis systems use 2-5 gallons of water for every clean gallon of drinking water while many other filtration or water softener systems need to do a backwash every 10-14 days. This backwash can take anywhere from 25-40 gallons of water that get wasted.

Hardless NG4 Whole House Water Filter And Conditioner

Customer Reviews

Based on 15 reviews
Joyce and Leonard Tachner
Clean water for the whole house and garden

Finally, a water system that softens and filters at the same time, and for the whole house, no salts needed. We installed our Hardless Water System two months ago and immediately tasted the disappearance of that chlorine taste so common in California water. We also noted a decrease in water spots on dishes, flatware and the shower doors. The white laundry looked whiter and colors brighter. Although our new refrigerator came with a water filter, we were still getting mineral clumps with our ice cubes. Once we installed the Hardless Water System the ice cubes dispensed clean.

All this clean water for the whole house and garden from a water system that’s a little bigger than an ostrich egg. We paid for reverse-osmosis systems (in one sink) and water softening systems for 40 years. I had to turn off the soft-water system every night so the salts would not accumulate in the garden when the sprinklers went on, and then push it back on in the morning when we wanted the softened water in the house. Now both the house and garden are benefiting from the Hardless Water System, with no extra tasks on our part. We are extremely satisfied with this system.

More conditioning

We had the NG3 and now we upgraded to NG4 and it is doing a much better job conditioning the water.

jarrett bolin
Love the water

WOW. I love this filter / purifier etc. Easy install and instantly our water is clean and fresh.
Thank you!

Terrie Taylor

So far I think it has made a difference in the household water quality.

Erna Baldvinsdottir
Hard water.

Made a lot of diffrence. No more hard water scales.

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