Water filters for sale
What is water filtration ?
The process of removing or reducing microscopic and macroscopic particles as well as odour, chemicals, biological contaminants and hardness from water to make it safe for drinking or other uses.
Is water filtration worth it ?
It is worth having a water filtration system at home, if you drink bottled water, in the long run the cost of water filtration system is lower as compared to the cost of bottled water. By using a water filtration system we also reduce significantly on plastic pollution as it means fewer plastic bottles are being used. A filtration system is convenient as you can have clean water readily available as long as there is a water supply.
Types of Filtration Systems
Mechanical: Involves passing water through a filter to macroscopic impurities. This system is like a sieve that get rid of the large particles.
Chemical: this is whereby chemicals are added to water. These chemicals tend to have adsorption capabilities that can be used to get rid of different kinds of pollutants.
Filtration methods common for household use
• Sediment Filtration: This system contains a sediment filter made from a pleated polyester that is washable or polypropylene. The pores on the filter come in different sizes(1-100 microns) The smaller pores are able to filter the smallest particles but at a much slower flow rate as compared to larger pores. It can be used in combination with other filters or just by itself. Some of the advantages are that it is simple to replace, a wide range of pore sizes available and it is cheap. On the other hand, it has drawbacks, it cannot filter particles and most importantly chemicals, smaller than 1 micron. To work effectively it has to be used in combination with other filters.
• Activated Carbon Block(ACB) Filtration: contains a carbon powder held together by an adhesive agent. It is one of the best for removing chlorine in water. Impurities with a lager size than the pores in the block are trapped when water passes through it. Carbon is positively charged and is thus able to attract all the negatively charged impurities like chlorine. In general this system has a good performance to cost ratio, improved filtration capabilities, it is not powered by electricity, good flow rate as compared to other systems and it has a long filter life. However, it requires a separate sediment filter to work effectively and cannot remove dissolved material and minerals.
• Granular Activated Carbon(GAC) Filtration: it basically works the same way as ACB but has larger particles which makes it a weaker filtration system, however, it is suitable for high flow rate and low intensity filtration scenarios. In most situations it is used in conjunction with carbon block filters. It protects the ACB from large particles. GACs are able to retain essential minerals while managing to get rid of chlorine. The other advantage is this a green technology which is good for our environment. The downside about this system is the fact that the particles have low density which might cause bacterial growth and it is weak against smaller particles.
• Reverse Osmosis Filtration: for this system, water is forced through a semi-permeable membrane from a region of high concentration of solvents(unfiltered water) to a region of lower concentration of solvents(filtered water). This is done to remove inorganic impurities from the water. It is able to get rid of 99% of impurities except for most soluble organic compounds such as pesticides and chlorine. The reverse osmosis system produces larger amount of brine, is quite costly and has a slow filtration rate. To cater for the slow filtration rate the system is usually connected to a pressure tank to store the filtered water. With proper maintenance it can reach up to 3 years of life.
• Distillation: it one of the oldest filtration processes. It is not widely used in industrial processes because it is costly. Water is boiled, collected during condensation after evaporation. When water evaporates it leaves some impurities as residue. Some solvents cannot be removed at temperatures at 100 Degrees Celsius or lower and will escape with the water. The output is quite low when compared to the input. In addition, the process is time consuming and can remove essential minerals from the water.
Other filtration processes include:
Benefits of Drinking Filtered Water
We have a wide range of products in the category that we can offer you.