Posted on Leave a comment

Welcome to visit Pursafet Booth -WQA Convention & Exposition 2022 at Orange County, Orlando FL

Pursafet Carbon Block Inc.
Booth No.: #727
Exhibition Time: April 7 – 8 , 2022
Exhibition Address: Orange County Convention Center, Orlando FL, USA

Pursafet strives to offer personalized service for you with complete water filtration products and solutions.

Our promising products include:
-Custom manufactured carbon block filter cartridges
-Refrigerator water filters
-Water pitcher & Filter system
-Coffee machine water filter
-POU water filter

We are looking forward to meeting you there.

Posted on Leave a comment

What needs to be removed from water for coffee ?

1 . Odor

One of coffee’s most distinctive and inviting characteristics is its aroma. Studies have indicated the smell of freshly brewed coffee alone is enough to improve mood and performance in test subjects.

To preserve that tantalizing coffee smell, all water used to brew coffee should be completely odorless. Chlorine, widely used to disinfect city water supplies, is notorious for imparting a stinging, pool water-smell on water.

Hydrogen sulfide leaves water with a pungent, rotten egg odor. Phenol compounds in water can leave a medicinal, sickly sweet odor whereas bacterial presence can leave water smelling like decay.

Obviously, any of these scents are enough to interfere with the fresh smell of coffee, not to mention repulse the coffee drinker. Any odor-causing contaminant should be completely removed from the water before brewing.

The pre-treatment of your water will depend heavily on the composition of your water, as different contaminants require different filtration approaches.

If you’ve identified an off-putting smell to your water, start by conducting a water test. This detailed report will illuminate the source of the foul smell in your water. 

2. Color

Coffee should be brewed with water that is completely clear in color. Any cloudiness, discoloration, or tint should be eliminated from the water prior to brewing.

This is both an aesthetic and a taste concern. Red or orange coloration is often indicative of the presence of heavy metals like iron, copper, or rust particles.

This can manifest in your water from aging, corroded pipes and is prevalent in groundwater supplies. While these don’t necessarily pose health concerns, they can leave a metallic taste in the water as well as ruin the color of the brew.

Sediment is extremely undesirable in the water, as it not only mars the color, it very likely could lead to a dirty or gritty taste.

To ensure you provide your customers with the mahogany-colored cup of coffee they expect, all water used to brew coffee should be totally clear. The most effective means of removing floating debris and particulate matter is through mechanical filtration. 

Sediment filters will sieve out any sand, silt, or dirt particles making their way into your water. Sediment filters are micron-rated to remove particles even past the limit of human visibility.

Turbidity (the measurement of the loss of water’s transparency due to suspended particles) is easily solved by installing an inline sediment filter with a fine micron rating. 

3. Chlorine

The contaminant that poses the biggest threat to your perfect cup of coffee is chlorine. Chlorine is a disinfectant commonly used by municipalities to eliminate bacteria and waterborne pathogens from drinking water. While it’s entirely safe to consume, chlorine is characterized by its sharp, unpleasant odor and its bitter chemical aftertaste.

Any detectable level of chlorine will tarnish the coffee’s flavor profile with a harsh aftertaste and prevent the coffee bean’s unique flavor notes from translating onto the palette.

To meet the SCA’s standards for brewing, the water cannot contain any traces of chlorine (0 mg/L) because of the overpowering negative consequences. If your coffee shop is on the city water supply, you will need to take steps to reduce the chlorine in your water. 

Carbon filters are the water industry standard for eliminating chlorine from water. Through adsorption, the chlorine attaches itself to the expansive, porous surface area of the activated carbon.

A carbon filtration system is a necessary component of any coffee house filtration system. The reduction of chlorine will ensure your roast’s character isn’t compromised by any chemical taste or smell.

Chloramines are an increasingly popular water disinfectant utilized by water treatment facilities. Chloramines are a more cost-efficient and longer-lasting alternative to chlorine and are created by the addition of both chlorine and ammonia to the water supply.

However, chloramines are more difficult to remove and require extensive contact time with activated carbon for any significant reduction to transpire. Because of this, catalytic carbon is preferred for chloramine reduction.

Catalytic carbon transforms the chlorine and ammonia into chloride, ammonia gas, and nitrogen gas. When sized properly, commercial catalytic carbon filters can eliminate chloramines from your water without compromising flow rates. Obtain a copy of your water distributor’s consumer confidence report to determine if your water treatment plant is using chloramines as a disinfectant. 

Posted on Leave a comment

A Guide for Coffee Machine Water Filters

A cup of great coffee starts with the water. Coffee is over 97% water, so commitment to water quality should be no less important than your attention to your beans, grind, and contact time. 

Attention to water quality is absolutely critical. Water quality allows for the full extraction of the flavor notes from the coffee.

A water filtration system will also protect your coffee and espresso machinery from being destroyed by scale, but retain enough mineral content to ensure proper extraction transpires during brewing. 

The best water for brewing coffee is crystal clear, odor-free water with zero chlorine, a light amount of water hardness, a neutral pH of 7, and moderate mineral content (around 150 TDS).

Water within these parameters promotes exceptional flavor extraction and full-bodied taste and smell. Since 98% of coffee is comprised of water, the water chemistry of your brew will leave a marked impact on the appearance, smell, and taste of the coffee.

The presence of chlorine risks tainting the coffee with an acrid chemical smell and aftertaste. If your water is too soft, the water won’t extract the subtle flavors of the coffee bean, leaving the brew with a flat taste.

There are three key water quality factors that must be absent from the water in order to brew coffee. The water must be free from any aroma, color, and chlorine for the full taste, body, and smell of the coffee to emerge.

Coffee and espresso filtration systems are water filtration systems designed to achieve ideal brewing quality. They help to remove Odor, Color and Chlorine from water and offer a purer, greater tasting of water.

Pursafet’s coffee machine water filters are manufactured under ISO9001 facilities, only use the food grade NSF/FDA certified raw materials, supplying top-notch products to all over the world.

Posted on Leave a comment

Refrigerator Warter Filters FAQ

If you’re wondering about refrigerator water filters, read on for answers to some of the most commonly asked questions about these products.

Q. Is there a difference between refrigerator water filters?

There is a difference. Refrigerator water filters are certified to filter out different contaminants. While some water filters may only reduce chlorine and improve taste, others will remove cysts, heavy metals, pesticides, and even pharmaceuticals.

Q. How do I know if my refrigerator water filter is clogged?

Over time, a water filter will become clogged with the contaminants it removes. If you notice that it is taking longer than normal to fill a glass with water, it may be time to replace the filter.

Q. How long do refrigerator water filters last?

Most refrigerator water filters last for about six months, which equates to between 200 and 300 gallons of water depending on how frequently the filter is used.

Q. Can I recycle my old refrigerator water filters?

While water filters cannot be recycled through standard city recycling programs, many manufacturers or recyclers have recycling programs for used filters.

Posted on Leave a comment

Things to Consider Choosing the Best Refrigerator Water Filter

In recent years, concerns about the quality of our drinking water supply have become more and more prevalent, and as a result we’ve become more aware of—and grateful for—the water filters that are included with refrigerators’ water dispensers.

While these water filters offer the convenience of chilled, filtered water in our kitchens, replacing the factory model filter when it wears out can leave us scratching our heads. Because refrigerator manufacturers have proprietary filter designs, finding a replacement filter that’s the right fit can be a challenge.

When you do find a filter that fits your appliance, remember that not all filters are the same. Some will simply reduce chlorine and improve taste, while other filters will also remove harmful contaminants, such as heavy metals, pesticides, and even pharmaceuticals.

This guide will review the features that shoppers will want to consider when selecting the best refrigerator water filter for their needs.

Determining which water filter model is compatible with your refrigerator is just one step in the decision-making process of selecting a replacement filter. The contaminants the product removes and the filter’s lifespan are other important factors to consider.

Refrigerator Compatibility 

First and foremost, the water filter needs to fit in the refrigerator. Fridge filters are by no means universal. Due to the wide variety of connection types in refrigerators, most filters are only compatible with one or two refrigerator manufacturers.

There are a few ways to determine which filters are compatible with a refrigerator; the easiest method is to remove the old filter and check the model number. A quick check of the fridge’s user manual (or the manufacturer’s website) should yield the information you seek. One last option is to check the water filter manufacturer’s web page, where you should find a list of refrigerator brands and model numbers along with the filters that fit them.

NSF Testing and Verification

NSF International is a nonprofit organization that tests and certifies consumer products to ensure compliance with certain standards for performance, safety, and quality. One of their areas of specialty is testing products in the water industry, among them refrigerator water filters. The organization uses a series of different classifications to test refrigerator water filters to certify what they can do.

  • NSF 42: Any water filter worth its salt will have, at the very least, an NSF 42 certification. Filters with an NSF 42 rating will reduce impurities such as chlorine while improving taste and odor.
  • NSF 53: Filters with this rating can remove a broader range of contaminants that cause health problems, including arsenic, mercury, radon, and asbestos, among many others.
  • NSF 401: Filters with an NSF 401 rating can remove certain harmful chemicals in drinking water, including prescription and over-the-counter drugs, herbicides, pesticides, and other chemicals, such as detergents.

Although these certifications help determine how effective filters are, they aren’t perfect. One filter may have an NSF 53 rating, but the number and type of heavy metals it can remove may differ from another NSF 53-rated filter. For this reason, it’s crucial to research the filters carefully and check the contaminants they do and do not remove before making a purchase.

Additional Certifications

The last thing one wants is to buy a water filter and find that it adds harmful chemicals to the water that is being filtered. In addition to the above certifications, there are additional NSF certifications you’ll find on water filters’ labels. These certifications show that the filters themselves do not use certain toxic materials in their construction.

  • A filter with an NSF 372 rating will not leach lead into the water.
  • An NSF 61 rating is broader, indicating that the filter will not leach toxic chemicals into the water.


Most refrigerator filters fit into a compartment inside the refrigerator and are quick and easy to install. They either plug into a socket and lock into place when the cover is closed or twist-lock into a receptacle. This simple installation design allows the user to change the filter easily, without leaving the refrigerator door open for a long period of time.

While changing the filter is an easy process, readying it for use is a bit more time consuming. The last step of installation for most filters is a process that involves running 4 gallons or more of water through the filter before it’s suitable for use. This is done to flush out bits inside the filter that may have come loose during shipping. This can be a tedious process, and one that requires numerous trips back and forth to the sink to drain water.

Replacement Frequency

Most refrigerator water filters last for about six months before wearing out. For the average family of four, this amounts to 200 and 300 gallons of filtered water. While water filters can be expensive, many manufacturers package them in bundles of two or more at more affordable per-unit rates. Buying water filters in bulk is an excellent money-saving strategy for keeping the water in the fridge fresh.

Pursafet ‘s refrigerator water filters are manufactured under ISO9001 standard facility and are compatible with most branded refrigerators, such as Whirlpool, Samsung, LG, GE, Frigidiare and Bosch. We are dedicated to provide customers with premium quality products.

Posted on Leave a comment

Easy Home Water Purification System Setup

There are few different setups of basic and advanced water filtration system at home, either for point of entry (POE) purpose like a whole house water filter or point of use (POU) purposes like for bathroom, washing machine, drinking, kitchen use, and more.

Let’s see the common home water purification system for easy setups:


Water Pitcher

Faucet Water Filter

Single-stage Countertop Water Filter

Single-stage Under Sink Water Filter


Multi-stages Countertop Water Filtration System

Multi-stages Under Sink Water Filtration System

Gravity Drip Water Filter

Water Pitcher

As a water pitcher only have one filter, so it’s usually an activated carbon filter or a mixed media filter that consists of a layer of sediment filter and activated carbon block or granules.

It aims to provide the basic water filtration need with the simplest setup (no installation needed, just buy and use).

Due to its lightweight design, you can just carry it around in the house and outdoor.

Want to drink cold water? Just put it in the fridge and enjoy a moment later.

Faucet Water Filter

Faucet type of water filter is designed for families who are looking for basic water filtration with continuous filtered water supply.

Its compact-size body that attached to your faucet makes your kitchen look neat and will not take up any countertop space.

Once the faucet filter is installed and ready, just turn on your faucet to enjoy your clean drinking water.

Single-stage Countertop Water Filter

A single-stage countertop water filter is suitable for people who need basic water filter but don’t wish to change their filter that often.

The countertop water filter usually come in higher capacity, allowing longer usage before the filter needs to be replaced.

Single-stage Under Sink Water Filter

Usually, for a single-stage filter, the under sink set-up is more preferred by most people as the countertop space is more precious.

By installing and hiding the water filter, piping, and valve at the under sink area, it makes the kitchen look better aesthetically.

Multi-stages Countertop Water Purification System

If you need a more advanced water filtration for your home, you’ll have to go for the multi-stages water purification system which consists of 2 or more water filters linked together.

There’s no single filter that can effectively remove all type of contaminants in water, so you have to use multiple filters with each of them deal with specific contaminants to achieve greater filtration capability.

But more filters also mean bulkier, so if your countertop doesn’t have much space, just go for the under sink set-up.

Gravity Drip Water Filter

Gravity drip water filter is a multi-layer water filtration system that is mainly used for outdoor and traveling purposes.

It’s also suitable for people with no kitchen access and renting a room due to its portability, all you need to do is pour the unfiltered water into the container area, wait for a moment, and get your clean drinking water from the collection area.

Depending on your water quality and the number of contaminants you want to remove, you may build a water filtration system at home that consists of 2 to 6 stages.

faucet water filter
countertop water filtration system

Posted on Leave a comment

Know About Water Filter Pitchers

Whether we drink from a plastic bottle or a kitchen faucet, we expect clean, crisp water. But headlines about toxic lead and chlorine remind us that our water supply doesn’t always flow fresh from cascading mountain waterfalls. Do we really know how safe our drinking water is?

 Lead is a heavy metal that leaches from corroding water lines and home plumbing fixtures. It’s unsafe at any level. Chlorine is used to kill germs in water systems, but disinfection byproducts can also pose a health threat. Chlorine is tied to higher incidences of cancer, especially in rural and low-income areas.Water filter pitchers aren’t a magic fix, but many can reduce lead, chlorine, and unpleasant tastes or smells.

Pitchers are the second-most preferred type of water filter after those built into refrigerators And they’re relatively inexpensive, typically less than $40, and easy to use. Just fill them at the tap and wait for the water to flow through the cartridge.

1. Filters Can Make Water Taste and Smell Better

Compounds and chemicals such as zinc, chlorine, and hydrogen sulfide can make your water have a metallic flavor or smell like sewage.Most models are quite effective with flavor and odor reduction.

2. All Water Filter Pitchers Are Different

No filter does it all. Some pitchers remove bad-tasting contaminants like chlorine, zinc, and hydrogen sulfide. Others remove lead. If a pitcher does filter out lead—or other contaminants such as volatile organic compounds, heavy metals, pharmaceuticals, and hormones—the packaging should cite a separate certification mark for each. If your water contains serious contaminants, a water pitcher filter might not be enough to mitigate the problem. You might need a more comprehensive filtration system.

3.Replacement Filters

Manufacturer instructions will tell you how often to change the filter. Usually, it’s every two months or 40 gallons, whichever comes first. You’ll want to follow those guidelines because filters clogged with particulates simply stop working. Also, the activated carbon in filters that traps flavors and odors has a finite capacity to absorb them before it stops functioning.If you notice water flowing slowly from your pitcher, it’s likely that the filter is clogged and it’s time to replace it. Some water filter pitchers have a filter-life indicator that tells you when it’s time for a replacement.

Pursafet water filter pitcher system offers purer, safer and greater tasting water for your every day life.

Posted on Leave a comment

Do you know How Ion Exchange Works

In the water softening process, the resin with positively charged sodium ions will capture the scale-forming positively charged calcium and magnesium ions in water and release the sodium ions to the water for exchange.

While for the deionization process, it can either exchange positively charged ions (cations) or negatively charged ions (anions).

In the anion exchange process, the negatively charged ions in water like fluoride, arsenic, nitrate, uranium, sulfate, and more get removed and exchanged with other desirable negatively charged ions like chloride (CI‾).

And when the ion-exchange resin capacity is fully used up, it will be undergoing a process called regeneration to restore the initial condition in the IX resin using regenerant like sodium chloride solution and hydrochloric acid.

The water softening and deionization is often used in water filtration system at home together with other filtration technologies like Reverse Osmosis (RO) and Activated Carbon.

The ion exchange process is effective in removing dissolved inorganic contaminants but weak against organic contaminants and microorganisms.

The Advantages of Ion-Exchange Method:

  1. Inexpensive
  2. Effective against dissolved inorganics contaminants
  3. Able to remove arsenic, fluoride, nitrates, sulfates, uranium, and more negatively charged contaminants
  4. Able to remove manganese, iron, chromium, magnesium, calcium, and more positively charged contaminants
  5. Regenerable for continuous usage

The Disadvantages of Ion Exchange Method:

  1. Cannot remove sediments, organic contaminants, and microorganisms
  2. The Ion-Exchange (IX) resin is vulnerable to bacterial growth
  3. High operating cost

Pursafet ‘s coffee machine water filters are with none sodium ion-exchange resin and coconut shell activated carbon granular filter media, which could help to reduce chlorine, taste , odor, prevent limscale to build-up to extend the coffee machine life.

Please check for details.

Posted on Leave a comment

About The Water Filtration At Home

1. What’s the ideal pH level of tap water?

The Ideal pH level of tap water is 7.5. The pH level between 7.0 and 8.0 is preferable because if the tap water pH level is below 7.0, the acidity may cause corrosion to pipes, appliances, and fixtures. If the pH level is above 8.0, the alkalinity may produce minerals deposits inside the pipes and on floors.

2. What are the common type of water filtration system in the market?

The common type of water filtration system in the market are sediment filter, activated carbon block filter, granular activated carbon filter, reverse osmosis filter, distillation, ion-exchange, ultraviolet disinfection, ultra filtration, activated alumina filtration, and ionization.

3. How long you need to replace your water filter cartridge?

It depends on the water filter capacity and family usage.

For most standard capacity activated carbon filter, it should be replaced at least once every year.

Reverse Osmosis membrane filter can last up to 3 years due to its self-wash mechanism.

Sediment filter like Polypropylene (PP) should be replaced more frequently, typically from 3 to 12 months time depending on usage.

Most of the time, the filter will come with a certain capacity in gallons, so you can find out your average monthly water usage and calculate the replacement period accordingly.

4. How to know whether the filter cartridge is clogged?

You can measure the pressure drop by installing pressure gauges before and after the filter.

When the filter cartridge is new, run the water filtration system and write down the difference of pressure reading (let’s say 2 psi). Then measure again after a few months, you’ll notice the pressure difference is increasing, let’s say to 7 psi.

When the difference of 2 pressure gauges reading reach about 15, it’s time to change the filter cartridge (or wash if it’s washable).

5. How to choose the right filter that can remove the contaminants in my water source?

The best way is to have your water tested on lab to identify the contaminants, and then pick the right water filters to remove those contaminants.

6. Can a TDS meter really measure the Total Dissolved Solids in the water?

The answer is no.

We have seen many people used a TDS meter or TDS pen to measure Total Dissolved Solids in their water without knowing what is really being measured.

In short, what TDS meter measured is the electrical conductivity (EC) in water (pure H2O has virtually zero EC), and then times the EC value by a factor between 0.5 to 1 (set by the manufacturer) to estimates the TDS (which is not the real Total Dissolved Solids in water).

For instances, dissolved organic solids (eg: sugar) and microscopic solid particles (eg: colloids) are not measurable by the TDS meter because they do not affect the water conductivity significantly.

The accurate way to measure the actual TDS in water is to evaporate the water and then weighing the dissolved residue left.

7. Is the water filter brand important?

Not absolutely but is recommended if it’s a highly reputable brand in term of product safety, quality control and customer support.

The important parts of considering a water filter are about the material of the components, where the components are manufactured, and the functionality of the filter system.

Pursafet carbon block water filters, refrigerator water filters, pitcher water filters, coffee machine water filters and POU water filter system are manufactured with NSF/WQA/FDA certified raw materials, 100% testing before shipping to customers’ s hand. Welcome to send inquiries.