RO System Filters
- Thread starter rcranf
- Start date
scsinet
Active Member
The membrane should last over 20,000 gallons. The only real way to know when it's time is by periodically checking your product water with a TDS meter, and replacing when the TDS starts to rise.
TDS meters are inexpensive and pay for themselves very easily becuase they help you get the absolute most out of a $70 membrane. A crappy $20 is all most people need.
Depending on what stages you have...
Sediment PreFilter - I change mine when it turns very dark brown. If you don't have clear canisters, you'll need to periodically pull the cartridge out and inspect it.
Carbon Filter - I change this whenever I change the sediment filter.
DI Stage - I know you don't have this from our previous discussion but I'll post anyway... this one should be changed every few hundred gallons. This can also get expensive since DI media isn't cheap. You can get color change media that changes color when it's depleted - this is the easiest way to know when to change them without guessing. You can also buy the raw resin in bulk and re-fill the little plastic cartridge and save a ton of money.
TDS meters are inexpensive and pay for themselves very easily becuase they help you get the absolute most out of a $70 membrane. A crappy $20 is all most people need.
Depending on what stages you have...
Sediment PreFilter - I change mine when it turns very dark brown. If you don't have clear canisters, you'll need to periodically pull the cartridge out and inspect it.
Carbon Filter - I change this whenever I change the sediment filter.
DI Stage - I know you don't have this from our previous discussion but I'll post anyway... this one should be changed every few hundred gallons. This can also get expensive since DI media isn't cheap. You can get color change media that changes color when it's depleted - this is the easiest way to know when to change them without guessing. You can also buy the raw resin in bulk and re-fill the little plastic cartridge and save a ton of money.
snakeblitz33
Well-Known Member
Any time your TDS reads greater than zero, you should replace your standard filters. If you replace your standard filters and you still have a TDS higher then zero, it's time to replace the membrane.
At least, that's how I've always done it...
At least, that's how I've always done it...
rcranf
Member
Originally Posted by SCSInet
http:///forum/post/2953299
What does the TDS on your tap water register?
tap water 315
http:///forum/post/2953299
What does the TDS on your tap water register?
tap water 315
chilwil84
Active Member
as with scsi i change my sediment filter by the color. my system has 2 carbon filters. i watch my pressure meter to judge my carbon filter, as it gets clogged my pressure goes down. i usually change it when the pressure drops 10-15 psi. and every 2nd time i replace my 1st level carbon filter i replace the 2nd one.
as my filters get clogged i would think the pressure would go up but it doesnt it falls and replacing it jumpss the pressure back up instantly so it works for me
as my filters get clogged i would think the pressure would go up but it doesnt it falls and replacing it jumpss the pressure back up instantly so it works for me
scsinet
Active Member
I've personally never seen an RO system produce 0 TDS. My source water is about 60, and my product water is about 4.
IMO if your source water is 315 - that's pretty bad - so your product water having 13 is probably pretty decent. Perhaps others can chime in on what their readings are.
IMO if your source water is 315 - that's pretty bad - so your product water having 13 is probably pretty decent. Perhaps others can chime in on what their readings are.
forcrz6
Member
Originally Posted by SCSInet
http:///forum/post/2953652
I've personally never seen an RO system produce 0 TDS. My source water is about 60, and my product water is about 4.
IMO if your source water is 315 - that's pretty bad - so your product water having 13 is probably pretty decent. Perhaps others can chime in on what their readings are.
Mine states
145 On the line in to the RO/DI system And on the out line is 1.
http:///forum/post/2953652
I've personally never seen an RO system produce 0 TDS. My source water is about 60, and my product water is about 4.
IMO if your source water is 315 - that's pretty bad - so your product water having 13 is probably pretty decent. Perhaps others can chime in on what their readings are.
Mine states
145 On the line in to the RO/DI system And on the out line is 1.