RO Prefilter

[lepete2000]

I just replaced my ro filters after a year of usage. Attached is the pix. The reddish filter on the right is the 5 micron 1st stage. Should I replace it sooner? I have a 90 GPD using WSSC water.

 

What do you think is reddish in the water? Clay or copper? I am thinking clay. I cant imagine my pipes is leaching that much copper. It's a 30 yr home.

 

Edited February 14, 2006 by lepete2000

[ErikS]

The pre-filter should be replaced when you see a pressure drop across the unit (it's restricting flow).

 

Color? Nah, that's not copper.......more like iron & other sediments.

[dbartco]

Well or city water?

 

Looks like iron to me though. Might want to look into a TDS for the future to know when to replace membranes and filters.

[ErikS]

Might want to look into a TDS for the future to know when to replace membranes and filters.

Good point..........but............if you have a final DI stage then the TDS will remain the same (just usage will increase)......unless you measure the TDS between the RO & DI.

 

Just some points to ponder :D

[lepete2000]

Thanks all...

 

I am using city water.

 

TDS Reading:

 

City - 150ppm

 

After RO: 2ppm

After DI: 0ppm

Waste Line: 200ppm

 

Shouldn't the Waste Line reading be around 300ppm?

[ErikS]

Not really, remember the waste from the RO has already been through the pre-filter(s) & even though somewhat concentrated there's no rule for the TDS.

 

As long as the good water TDS is 0 (or close) it's all good, right? :D

[lepete2000]

Not really, remember the waste from the RO has already been through the pre-filter(s) & even though somewhat concentrated there's no rule for the TDS.

 

As long as the good water TDS is 0 (or close) it's all good, right? :D

53215[/snapback]

 

oh yeah... I forgot about the pre-filter retaining some stuff.

 

Thanks ErikS.