Add-On Filters for Your Present
Drinking Water System

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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:

  1. 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.)

  2. Filter Cartridge

    Selected from the list below.

  3. 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.

$45.00
Part # ao200
Price: $45.00

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.

$45.00
Part # ao100
Price: $45.00

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.

$3.25
Part # jg022

Plugs into a straight 3/8" John Guest fitting to make a swiveling elbow.

$4.60
Part # jg024

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.

Description
Price

A high quality nitrate reduction cartridge.

Type

Media

Media

  • Anion Resin

$48.00
Part # fc010

A popular depth filter for normal sediment applications.

Type

Sediment

Micron

  • Nominal 5

$7.00
Part # fc107

1.5 pounds of KDF 55 with granular activated carbon. Extended chlorine reduction and heavy metal reduction.

Type

Media

Media

  • Activated Carbon

  • KDF 55

$39.00
Part # fc008

A calcite cartridge designed to raise pH and TDS of low pH / low mineral water.

Type

Media

Media

  • Calcite

$24.00
Part # fc018

A water softening cartridge filled with standard cation softener resin. Frequently used for car washing and window cleaning. Works best at low flow rates.

Type

Media

Media

  • Cation Resin

$19.00
Part # fc024

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.

Type

Carbon Block

Micron

  • Nominal 0.5

Media

  • Activated Carbon

  • Lead Removal Resin

$29.00
Part # fc004

0 items, total: $00.00