Add-On Filters for Your Present
Drinking Water System
Questions?
Call us at (888) 382-3814
A simple addition to your current drinking water system to remove fluoride, nitrates, lead, sodium, arsenic, sediment, bacteria or other problem contaminants, or to adjust the pH and mineral content.
You can add a dimension to your current water filter, or install an inexpensive specialty filter where no filter exists, by using the items provided on this page.
For example, if you have an undersink carbon block filter, you can add fluoride-removal capability to it by inserting our AAL cartridge into your faucet line. And you can do it virtually without tools. Clip the faucet line and insert the ends into the quick connect fittings of our housing.
Or, if you have a reverse osmosis unit and would like to add a pH enhancing post filter, just insert a calcite cartridge into the faucet line.
If you have a carbon block filter that becomes clogged with particulate, you can prolong its life by inserting an inexpensive sediment filter in front of it.
You can assure absolute bacteria-free and cyst-free performance from any existing filter by adding a ceramic cartridge after the filter.
The many possibilities include nitrate reduction, sodium reduction, softening, de-ionizing, lead and heavy metal removal, and you can greatly increase the life of any existing filter by adding to its chlorine/chemical-removal capacity.
(If you'd like to add a filter to your washing machine, see our Washer Filters.)
Add-On Systems Elements
You'll need the first two items, the third is optional:
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Filter Housing
We recommend the flat-bottomed housing for ease of installation and service, but we also offer a wall-mounted alternative.
When ordering, specify 1/4" or 3/8" tube ports. The housing comes equipped with quick connect fittings that work best with plastic tubing, but they will adapt to copper. (If you want an alternative compression fitting, please ask.)
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Filter Cartridge
Selected from the list below.
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Plug-In Elbow Packet (Optional)
This optional item allows you to make swiveling elbows of your straight fittings. It often makes installation much easier.
Basic Unit and Cartridges are sold separately.
Freestanding
Flat-Bottomed Add-On Unit
Please give tubing size — 1/4" or 3/8". The unit comes with straight quick-connect fittings that allow you to simply push the end of your present plastic tubing into the fitting.
Optional Plug-in elbows are available (see below), so that one or both fittings can be easily converted to an elbow if needed.
Filter cartridges are sold separately. (See below.)
Add-on unit with straight quick-connect fittings. Filter cartridge sold separately.
Bracket Mounted Add-On Unit
Bracket included. Please give tubing size — 1/4" or 3/8". The unit comes with straight quick-connect fittings that allow you to simply push the end of your present plastic tubing into the fitting.
Optional Plug-in elbows are available (see below), so that one or both fittings can be easily converted to an elbow if needed.
Filter cartridges are sold separately. (See below.)
Add-on unit with straight quick-connect fittings. Filter cartridge sold separately.
Quick Connect
Plug-In Elbow Fittings
These fittings quickly convert the standard “straight” fittings to swiveling elbows.
Plugs into a straight 1/4" John Guest fitting to make a swiveling elbow.
Plugs into a straight 3/8" John Guest fitting to make a swiveling elbow.
Suggested Cartridges
Suggestions from among the many cartridges you can order for these units. Go to our Cartridge Menu for a full list. Any 9.75" X 2.5" cartridge will fit these add-on units.
A high quality nitrate reduction cartridge.
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Type |
Media |
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Media |
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A popular depth filter for normal sediment applications.
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Type |
Sediment |
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Micron |
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1.5 pounds of KDF 55 with granular activated carbon. Extended chlorine reduction and heavy metal reduction.
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Type |
Media |
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Media |
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A calcite cartridge designed to raise pH and TDS of low pH / low mineral water.
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Type |
Media |
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Media |
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A water softening cartridge filled with standard cation softener resin. Frequently used for car washing and window cleaning. Works best at low flow rates.
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Type |
Media |
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Media |
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High quality 0.5 micron carbon block drinking water filter. Rated for cyst removal and lead reduction, plus excellent taste/odor and chemical reduction properties. Not recommended for use in reverse osmosis units.
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Type |
Carbon Block |
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Micron |
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Media |
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Site Index
Filtration Systems
- Aeration for Iron & Sulfide
- Backwashing Filters
(whole house & well units)
- Chlorine & Chemical Injectors
- Countertop Water Filters
- Emergency Filters
- Garden Hose Filters
- Reverse Osmosis, Residential
- Reverse Osmosis, Commercial
- Shower Filters
- Specialty Filters
- Ultraviolet Systems
- Undersink Filters
- Water Softeners
- Whole House Filters
Cartridges
Parts
- Replacement Parts
- Faucets
- Filter Media
- Fittings
- Housings
- O-rings
- Pumps
- Pura UV
- R.O. Parts
- R.O. Tanks
- R.O. Booster Pump
- VIQUA UV