When it comes to filtration systems, reverse osmosis is one of the finest options available to homeowners. The process of RO filtration can remove extremely minute particles from water and is used on large scale applications to purify seawater because it is such an energy efficient means of removing dissolved particles from water. If you are looking to buy an RO water purifier for your home, it is important to know about the RO process.
Osmosis is a natural process that describes how water moves through a semipermeable membrane. If you put equal amounts of freshwater and saltwater on either side of a semipermeable membrane, the freshwater will flow through the membrane towards the salt water, attempting to reach an equilibrium of total dissolved solute concentration. At some point, the process will level out due to the weights of the two liquids, with the saltwater not able to absorb any more freshwater without becoming so heavy that it pushes water back through the membrane. This leveling factor is known as the osmotic pressure.
By overcoming the osmotic pressure on the salt water side, water will flow back until you are left with a very small amount of very salty water on the original saltwater side and nearly twice the amount of freshwater on the other side. This is how reverse osmosis filtration works, water is pressurized against an RO membrane and purified water is collected on the other side. A small amount of wastewater is removed from the input side containing all of the dissolved solids and the process repeats itself.
This process requires processing a relatively small amount of water in cycles, meaning that small RO systems tend to have low flow rates compared to the water supply of conventional carbon media filters. In order to make up for this fact, most RO systems have some form of storage tank to keep a reservoir of filtered water that is ready to use. After giving your tank a day to refill, you should always be able to enjoy as much filtered water as needed.
Because they need these storage tanks, most home RO systems are also larger than your average under sink carbon media filtration system. Most reverse osmosis water filtration systems will need several stages of filtration in order to protect the membrane from large particles and chlorine. Some systems will also use post filters to help remove and volatile organic compounds that make it through the filter membranes.
One of the best home reverse osmosis filters is the Everpure ROM IV. The ROM IV has a storage tank that holds 4.5 gallons of water and uses three stages of filtration in its purification process. These systems do require additional space, but are still designed to fit underneath most kitchen sinks. The system can process up to 14 gallons per day and the high recovery membrane reduces the amount of wastewater lost in the reverse osmosis process. Drinking water is dispensed using a dedicated water dispenser so you can continue to use your kitchen faucet as usual without wasting filtered water.
If you want to buy an RO water purifier and are interested in finding out more about the ROM IV, you need to visit www.efilters.net. The team at efilters specialize in home filtration and are experts on Everpure brand water filtration systems. Visit their website and feel free to contact a member of their team if you have any questions about finding the best filtration system for your home.