Articles in Category: Membranes

This is how we think a person should go about changing their RO Membrane.  Click here to Watch!

Answer: A CTA (Cellulose Triacetate) membrane is a paper by-product membrane bonded to a synthetic layer. Due to its cellulose composition, a CTA membrane requires chlorine in the water source to keep bacteria from forming on it. A CTA membrane has a rejection rate of between 85 – 94%. CTA membranes have an average life […]

Answer: R.O. Membrane – Turn the water off at the inlet saddle valve (or supply valve) and open the RO faucet to drain the storage tank. When the storage tank has been emptied, close the RO faucet. Next, close the valve on the storage tank. Disconnect the tubing going into the end of the membrane […]

Answer: Sediment Pre-Filter – It is best to change a sediment filter every 6 months to a year (more frequently when there is a high level of dirt and rust present in the water). Carbon Pre-Filter – It is best to change a carbon filter every 6 months to a year. Proper pre-filter maintenance will […]

Answer: 1. Cold Water Line Saddle Valve: Saddle Valve that fits onto the cold water supply line. The saddle valve has a piercing needle that penetrates into the cold water line to supply the water for the RO system. 2. Pre-Filter (s): Water from the cold water supply line enters the RO pre filters first. […]

Answer: Our high quality Reverse Osmosis systems use a process known as crossflow to allow the membrane to continually clean itself. As some of the fluid passes through the membrane the rest continues downstream, sweeping the rejected contaminants away from the membrane and down the drain. This prevents contaminants from backing up against the membrane […]

Answer: The filters of your RO system should be changed periodically.   In general, both the pre- and post-filters should be replaced about every six months, or at least annually; however, the maintenance schedules may vary due to local water conditions, the quality of water being filtered and if you have other water pre-treatment such as […]

Answer: RO systems are capable of removing certain biological contaminants such as Cryptosporidium and Giardia.  The pore size of the RO membrane along with the amount of pressure applied to the water will generally determine the rate of reduction of such contaminants.  The Water Quality Association (WQA) states,  that while RO membranes are reliable for […]

Answer: With the exception of a few proprietary RO system manufacturers, all residential membranes are the same size and all fit in the same membrane housing. When the residential RO market first started to come alive, nearly all of the membranes where 8 to 10 gallons per day systems. Many of the proprietary membranes are […]

Answer: Yes, it is necessary to match the capacity of the RO membrane and the flow restrictor. Unless the capacity of these two items are matched, you will either be putting too much water to the drain or you will pre-maturely foul the RO membrane. See our comments on flow restrictors for added information.