RO Filters

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ss95003

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I am curios when I should start to replace filters on my RO unit. According to my TDS meter water pre DI is 6 and of course after it is Zero. Was curious when and which filters should be changed. The unit I have has 3 pre filters the membrane and DI unit.
 
They should be changed at 6 months, and the DI should be good for 12 months usually. Obviously it depends on how much water is being produced, but lately I've had lots of people tell me they've not changed the filters in 1 to 1.5 years. Yet they change the oil filter in their car every 3000 miles, and the air filter in the a/c monthly. Changing RO filters every six months should be a rule that everyone follows, to protect the membrane, protect the tank, and keep production rates up.

Just my opinion.
 
So all three pre filters should be changed in your opinion? There are some many kinds of filters I really have no idea which ones are best for our/my area. Any ideas? Also how long does the membrane last?

By the way my last car I really did not like it I bought it because it was cheap and I need to save some money. I had it for 2 years and put about 40K on it. Um 3 oil changes. When I traded it in the dealer said you really took car of your car it really clean. I guess he did not pull the dip stick :lol:. The good thing is the new car only needs new oil every 15K and all maintenance is "free" until I hit 40K or 50k can't remember off the top of my head.

Don't worry though Marc I do, do my weekly what changes and regular maintenance on my tank, because I like my tank.
 
The prefilters on some RO units consists of one sediment filter and two carbon filters. Usually these are 10" standard-sized filters. All three should be changed at once, every six months.

The membrane should be good for three to five years, and it horizontally on top of the bracket, housed in a giant tylenol pill-shaped white casing.

The DI may be vertically or horizontal depending on the type of RO unit you own. Once the DI is spent, the TDS will measure higher coming out than it is going in. So either it will last 12 months or the TDS will indicate it is time to change it out.
 
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