TROUBLESHOOTING
LEAKS BETWEEN THE SYSTEM HEAD ASSEMBLY AND THE FILTERS:
1. Turn off the water supply to the filter and dispense water from kitchen faucet until
water and airflow stops.
2. Remove cartridge and inspect o-rings to make sure they are in place and clean.
3. Install cartridge, turn on water supply and check for leaks.
LEAKS AROUND THE FITTINGS:
1. Turn off the water supply to the filter to relieve pressure.
2. While pulling the 3/8" plastic tubing with one hand, press in on the collar around the inlet
and/or outlet fitting. Check to make sure that the 3/8" plastic tubing is cut squarely and that
it is not scratched or crimped. If the 3/8" plastic tubing is unevenly cut or scratched, cut off
1/2" to 5/8" and re-install the tubing.
3. Turn on water supply and check for leaks.
LEAKS ON THE WATER SUPPLY ADAPTER CONNECTION:
1. Turn off the water supply to the filter to relieve pressure.
2. Locate the water supply adapter.
• If the 3/8" plastic tubing is leaking, follow the previous steps ("Leaks around the fittings").
• If the thread between the water supply adapter and the cold water line is leaking,
tighten more securely. If leaking continues, apply plumbers tape to threads and tighten.
3. Turn on water supply and check for leaks.
If leaks persist, or if there are other leaks on system, turn off water supply.
Call technical support at 1-800-721-7360.
PRODUCT REGISTRATION
Please be sure to go online within 30 days of purchase and register your product at
www.register.culligan.com.
THE US-DC1 IS CERTIFIED BY IAPMO R&T AGAINST NSF/
ANSI 42 FOR THE REDUCTION OF AESTHETIC CHLORINE
TASTE AND ODOR.
THE US-DC2 IS CERTIFIED BY IAPMO R&T AGAINST NSF/
ANSI 42 FOR THE REDUCTION OF AESTHETIC CHLORINE
TASTE AND ODOR AND NSF/ANSI 53 FOR THE REDUCTION
OF CYSTS.
THE US-DC3 IS CERTIFIED BY IAPMO R&T AGAINST NSF/
ANSI 42 FOR THE REDUCTION OF AESTHETIC CHLORINE
TASTE AND ODOR AND PARTICULATE CLASS I AND NSF/
ANSI 53 FOR THE REDUCTION OF CYSTS AND LEAD.
THE US-DC4 IS CERTIFIED BY IAPMO R&T AGAINST
NSF/ANSI 42, 53, 401 FOR THE REDUCTION OF CLAIMS
SPECIFIED ON THE PERFORMANCE DATA SHEET AND
AGAINST NSF/ANSI 372 FOR LOW LEAD CONTENT.
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