| There are many filtration systems on the market | | | | systems: with tank and tankless. |
| today. The reverse osmosis is one of them. | | | | The first type uses a small tank of about four |
| The effectiveness of this system is depends on | | | | gallons that contain two gallons of internal plastic |
| the concentration of contaminants, the water | | | | bladder which holds the purified water before it |
| pressure and membrane selection. | | | | dispensed. The remaining volume of the tank |
| Reverse osmosis system - uses pressure that | | | | contains pressurized air that forced water to the |
| forces unfiltered water to flow through the | | | | faucet. To prevent purified water in the tank to |
| membrane and out of the low pressure side. | | | | develop a "flat" taste after it stay there for an |
| All impurities that were not able to pass through | | | | extended period of time companies use inline |
| membrane are wasted away to drain. | | | | carbon filters that are located between the tank |
| There are two types of membranes that are | | | | and the dispensing faucet. |
| used in reverse osmosis system to prepare | | | | The tankless reverse osmosis system uses |
| drinking water. | | | | multiple TFC membranes. This is allowing purified |
| One type is cellulose triacetate membranes | | | | water to be dispensed directly to the tap. |
| named "CTA". These mebranes are organic and | | | | Tankless system is more compact than traditional |
| more affordable. However, there are some | | | | system, does not require water storage and |
| drawbacks: these membranes require | | | | occupy less cabinet space. However, this |
| disinfection to prevent of bacteria to grow and | | | | system is more expensive than traditional. Also, |
| sometimes they produce a lower volume and | | | | there are more costly membranes to replace. |
| quality of purified water. | | | | Another disadvantage of tankless system is that |
| The CTA based systems usually contain sediment | | | | it require pressure at 40 PSI. For this reason, |
| pre-filter that is followed by the membrane, and a | | | | pressure booster pump maybe required. |
| post filter containing carbon. This systems | | | | Disadvantages of reverse osmosis systems: |
| works best with chlorinated water supply. | | | | Most expensive and better quality systems send |
| The second type of membranes is named | | | | two to four gallons of water to the drain and |
| "FTC". They are inorganic, and therefore not | | | | lower cost systems usually send as much as six |
| susceptible to bacteria grow. FTC membranes | | | | and more gallons to the drain for every one gallon |
| are more expensive. These membranes could | | | | they prepare. Purified water developed from |
| be easily damaged by chlorine that is present in | | | | reverse osmosis system is cost around |
| the water. That is why the reverse osmosis | | | | eighteen-twenty four cents per gallon. |
| systems that uses this type of membrane utilizes | | | | The biggest disadvantage of the reverse osmosis |
| a carbon pre-filter that absorbs chlorine and | | | | system is the producing of mineral free water |
| prevents TFC membranes from failure. | | | | which is not healthy to drink in a lifetime. The |
| TFC contain systems normally have a combination | | | | doctors always recommended taking mineral |
| of sediment / carbon pre-filter, followed by by | | | | supplements when drinking reverse osmosis |
| the membrane and additional carbon post filters. | | | | water. This supplements counterbalance the |
| There are two types of reverse osmosis | | | | bleaching effect of drinking mineral free water. |