DI system over an RO

What is a DI system and an RO system?


Well there is two different ways to purify water. There is a DI system and a RO system.


RO System


RO stands for reverse osmosis. Reverse Osmosis is a 4 stage process in which dissolved inorganic solids (such as salts) are removed from a solution (such as water). The water goes through a carbon filter and then a sediment filter. Then pressure is applied to push the water through a semi permeable membrane. The membrane (which is about as thick as cellophane) allows only the water to pass through, not the impurities or contaminates. These impurities and contaminates are flushed out of the system. Then for the final stage the water would go the a DI filter to remove all impurities. 


DI System


A DI systems involves the passage of water through the first exchange material removes the calcium and magnesium ions just as in the normal softening process. Unlike home equipment, deionisation units also remove all other positive metallic ions in the process and replace them with hydrogen ions instead of sodium ions. DI systems are smaller than RO systems as its just the one filter where as the RO System can be 4 filters or more.


A DI system is more environmentally friend than an RO. A RO system flushes a lot of waste water out before it goes into your storage tank. So you could possibly push a 100 litres of water through a RO system and only get around 25 litres of pure water.


At InsideOut Windows we use a DI system. A DI system is more expensive to run as you will have to change the sediment inside more often than an RO system. But with a DI system you will push a 100 litres of water through and get a 100 litres of pure water out the other end. This is a lot more economical for both InsideOut Windows and Northumbrian Water.