R/O units ?
- Thread starter flyersfan
- Start date
deeze
Member
I just got a great one from that big auction site 
It's great because it has a DI system at the end. Several stages but my old one has a UV which I'll be porting in. Under a $100.00 and includes an auto top-off kit. Pay attention to the actual RO stage filter because that will have to be replaced after continued use.
It's great because it has a DI system at the end. Several stages but my old one has a UV which I'll be porting in. Under a $100.00 and includes an auto top-off kit. Pay attention to the actual RO stage filter because that will have to be replaced after continued use.
deeze
Member
Make sure the unit you buy doesn't use the junky little in-line back pressure plastic fitting. This is a way the RO manufactures save money. It's MUCH better to get the units with the Manual Flushing Flow Restrictor. Trust me it's great, this allows you to perform a monthly flushing of the RO membrane and basically doubling the live of the membrane. Very nice feature. I just turn the valve and water flushes quickly through the membrane and cleans it... simply close the valve and everything returns to normal.
I can't see where airwaterice does this but maybe so.
I can't see where airwaterice does this but maybe so.
javatech1
Member
yes they have a fast flush valve
and as far as "doubling the live of the membrane" that won't happen maybe an other year all depends on the water you have and what membrane you use i have a 100 gpd but when i replace mine i will uae a 75 gpd
The major difference is in the life of your DI cartridge. The 75 gallon per day membrane is rated to reject about 98% of the TDS. The 100 GPD Membranes is rated at about 90%. That difference changes the amount of work the DI has to do. If you do not need the large volume of water you are better off with the 75 gallon per day or smaller membrane. The non rejected TDS is mopped up by the DI so the less mopping up to do the longer the DI lasts. Our DI cartridge is rated at 6,800 PPM Divide the 6,800 by the output of the membrane to determine the number of gallons you can expect from the DI Example: Tap water 200PPM. The expected output of the 75 gpd would be 6-12 ppm. The expected output of the 100 gpm would be 20-40 ppm. Actual values are dependent on you tap water quality, pressure and temperature. 6800 > 12 = 566 gallons 6800 > 40 = 170 gallons.
and as far as "doubling the live of the membrane" that won't happen maybe an other year all depends on the water you have and what membrane you use i have a 100 gpd but when i replace mine i will uae a 75 gpd
The major difference is in the life of your DI cartridge. The 75 gallon per day membrane is rated to reject about 98% of the TDS. The 100 GPD Membranes is rated at about 90%. That difference changes the amount of work the DI has to do. If you do not need the large volume of water you are better off with the 75 gallon per day or smaller membrane. The non rejected TDS is mopped up by the DI so the less mopping up to do the longer the DI lasts. Our DI cartridge is rated at 6,800 PPM Divide the 6,800 by the output of the membrane to determine the number of gallons you can expect from the DI Example: Tap water 200PPM. The expected output of the 75 gpd would be 6-12 ppm. The expected output of the 100 gpm would be 20-40 ppm. Actual values are dependent on you tap water quality, pressure and temperature. 6800 > 12 = 566 gallons 6800 > 40 = 170 gallons.
acrylic51
Active Member
Originally Posted by javatech1
yes they have a fast flush valve
and as far as "doubling the live of the membrane" that won't happen maybe an other year all depends on the water you have and what membrane you use i have a 100 gpd but when i replace mine i will uae a 75 gpd
The major difference is in the life of your DI cartridge. The 75 gallon per day membrane is rated to reject about 98% of the TDS. The 100 GPD Membranes is rated at about 90%. That difference changes the amount of work the DI has to do. If you do not need the large volume of water you are better off with the 75 gallon per day or smaller membrane. The non rejected TDS is mopped up by the DI so the less mopping up to do the longer the DI lasts. Our DI cartridge is rated at 6,800 PPM Divide the 6,800 by the output of the membrane to determine the number of gallons you can expect from the DI Example: Tap water 200PPM. The expected output of the 75 gpd would be 6-12 ppm. The expected output of the 100 gpm would be 20-40 ppm. Actual values are dependent on you tap water quality, pressure and temperature. 6800 > 12 = 566 gallons 6800 > 40 = 170 gallons.
Very well put....That's why I always tell people this sort of thing when they talk about getting deals on ---- their units do 100gpd.......They aren't saving any real cash, because of the membranes.......
yes they have a fast flush valve
and as far as "doubling the live of the membrane" that won't happen maybe an other year all depends on the water you have and what membrane you use i have a 100 gpd but when i replace mine i will uae a 75 gpd
The major difference is in the life of your DI cartridge. The 75 gallon per day membrane is rated to reject about 98% of the TDS. The 100 GPD Membranes is rated at about 90%. That difference changes the amount of work the DI has to do. If you do not need the large volume of water you are better off with the 75 gallon per day or smaller membrane. The non rejected TDS is mopped up by the DI so the less mopping up to do the longer the DI lasts. Our DI cartridge is rated at 6,800 PPM Divide the 6,800 by the output of the membrane to determine the number of gallons you can expect from the DI Example: Tap water 200PPM. The expected output of the 75 gpd would be 6-12 ppm. The expected output of the 100 gpm would be 20-40 ppm. Actual values are dependent on you tap water quality, pressure and temperature. 6800 > 12 = 566 gallons 6800 > 40 = 170 gallons.
Very well put....That's why I always tell people this sort of thing when they talk about getting deals on ---- their units do 100gpd.......They aren't saving any real cash, because of the membranes.......