Additional RO filter
- Thread starter Dragos2017
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Bannerman
Well-Known Member
Most packaged RO systems include equally sized 10" X 2.5" filters. Assuming that larger filter is feeding the RO unit (as opposed to feeding the regular kitchen faucet), I suspect it will contain a carbon cartridge for removal of chlorine or chlorimine, either of which is common in municipal sourced water.
As it seems you did not have this RO unit installed, the filter's contents cannot be assured until the housing sump is removed so as to expose the cartridge inside.
As it seems you did not have this RO unit installed, the filter's contents cannot be assured until the housing sump is removed so as to expose the cartridge inside.
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Dragos2017
Member
ah! It looks like this:
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Bannerman
Well-Known Member
Appears to be carbon of some type but, can't see the sides clearly. Any markings or numbers on sides or bottom of the cartridge? Where is that filter connected to?
If the unit was already in the house when you moved in, you probably don't know when the cartridges and the RO membrane were last replaced. Suggest replacing them all and sanitizing the housings and storage tank while the housings are empty.
The effectiveness of the membrane can be tested against the raw water using an inexpensive TDS meter, but membranes are relatively inexpensive and so replacing it with the cartridges may give you peace of mind that everything is clean, renewed and working as well as intended for your family initially.
The membrane will typically need replacing every 2-4 years whereas filter cartridges, 6-12 months.
If the unit was already in the house when you moved in, you probably don't know when the cartridges and the RO membrane were last replaced. Suggest replacing them all and sanitizing the housings and storage tank while the housings are empty.
The effectiveness of the membrane can be tested against the raw water using an inexpensive TDS meter, but membranes are relatively inexpensive and so replacing it with the cartridges may give you peace of mind that everything is clean, renewed and working as well as intended for your family initially.
The membrane will typically need replacing every 2-4 years whereas filter cartridges, 6-12 months.
ditttohead
Water systems designer, R&D
Hard to say, it could be a remineralizer of some type, an alkaline filter, specialty contaminant filter (bone char for fluoride reduction, etc...) or even a Di filter.
Taylorjm
Active Member
That doesn't look like a stock part to the ro system. It was added on separately. Like someone said, could be a carbon filter or adding minerals back in. Actually now that I look again, you can see on the ro setup, there's a clamp on top of the ro membrane filter that would normally hold a polishing carbon filter. The filter is missing. I'm guessing someone added that carbon filter instead of purchasing the one that came with the ro setup. No biggie really. Probably just a standard carbon filter.
