Installation Instructions Model CTD-CB & CTD-CH Double Countertop Filter with Carbon Block

Remove the aerator from the end of you faucet and replace it with the diverter valve. To install, turn the diverter valve clockwise over the faucet end and tighten. If your faucet has outside threads, the diverter will fit without an adapter fitting ring.  If your faucet has inside threads, use one of the two enclosed adapter fitting rings and gasket, that fits your faucet's inside threads.  If your faucet has non-standard threads, you may need to purchase a special adapter from your local Home Depot or Lowe's or measure the opening and call us.

To Operate

Move the spout over your sink, and rotate the knob on the diverter.  Then turn the water on cold only, and run the water for several minutes to flush out the cartridges.  This will remove the carbon fines from the new KDF/GAC cartridge and the carbon block.  The water may contain air bubbles, but that will clear after a short break-in period. Turn the diverter knob back to it's initial position for unfiltered water from your sink faucet.

Operating Tips

You should run the water several minutes if you haven't used the filter over night, or after returning from a trip. Water standing in the filter can taste bitter due to excess zinc oxide produced by the KDF.  It's not harmful, and actually protects the cartridge from bacteria growth.  Running the filter before use will remove the taste.

The filter should be run at 1 gallon a minute or less for maximum chlorine removal.  Any faster will reduce the removal percentage.

If you move, or disconnect your filter from your faucet and store it, always keep water in the cartridge to prevent damage to the KDF media.  To remove the tubing from the quick connect fitting, push down on the outer ring of the fitting and then pull the tubing out.

If you'd like to install your filter under your sink, you can convert it for under counter use with our faucet conversion kit, part number "FK."

Testing for Chlorine and Cartridge Replacement

Before replacing the KDF/GAC cartridge, test for chlorine using the enclosed chlorine test strips.  Place some filtered water into a cup and dip the test strip into the water moving it back and forth for 10 seconds.  The color of the water will determine the amount of chlorine present, if any.  If chlorine is present, then you'll need to replace the cartridge.  You must read the test strips immediately; otherwise they can change color and give a false reading.  Additional test strips are available (2 for $1.25) from Software Exchange LLC/The Water Exchange. Our cartridge has been tested to remove chlorine for over 12,000 gallons of water, and it still may be removing the chlorine after 3 years of use, but it is recommended that you replace the filter every three years.

Replacing the KDF/GAC Cartridge

Remove the top of the second housing with the enclosed wrench (counterclockwise) and discard the old filter.  Insert the cartridge with the black (GAC) end toward the base (wide end of housing) and the gold end into the top (the sump).  Then hand tighten.  Run for several minutes to remove the carbon fines from the new KDF/GAC cartridge, and check for leaks.

Insert the new cartridge with the black (GAC) end toward the base (wide end of housing) and the gold end into the top (the sump).  Then tighten with the wrench, but do not over tighten.  Run it to check for leaks.

Replacing the Carbon Block or GAC Cartridge

Replace the carbon block (or GAC) cartridge (in the second housing) yearly.

Operating Specifications and Warranty Information

Maximum water pressure is 100 PSI and maximum operating temperature is 110 F.

Housing has a 5-year warranty.  The KDF/GAC cartridge has a 3-year  warranty, prorated at $1.65 per month of usage.

This warranty does not cover damage due to abuse, neglect, freezing, fire or other fortuitous event. No allowance is made for the consequential damage, labor or expense incurred as a result of a proven defect.

Our filters are not warranted against sediment clogging. If the flow rate is significantly reduced, clogging is most likely. You can try to back-flush the filter by reversing the fittings on the housing to temporarily reverse the water flow.

If you have a problem with your filter,  call 1-248-788-3342 or e-mail for technical support.