Specifications
Pressure Range:
30–125 psi (2.1–8.6 bar)
Temperature Range:
40–100°F (4.4–37.8°C)
Parts Included
• Filter housing with D-40 filter cartridge, built-in mounting bracket, and quick-connect
fittings
• Lead-free drinking water faucet
• Quick-connect union, tee, and faucet adapter
• 3/8-inch tubing
• Screws for mounting bracket
Optional Materials
• SW-5 housing wrench
Tools Required
• screwdriver
• file
• pencil
• pipe cutter or hacksaw
Precautions
WARNING:
Do not use with water that is microbiologically unsafe or of unknown
quality without adequate disinfection before or after the system. Systems certified for cyst
reduction may be used on disinfected waters that may contain filterable cysts.
CAUTION:
Filter must be protected against freezing, which can cause cracking of the filter
and water leakage.
CAUTION:
The rubber O-ring provides the water-tight seal between the cap and the bot-
tom of the housing. It is important that the O-ring be properly seated in the groove below
the threads of the housing or a water leak could occur.
CAUTION:
Because of the product’s limited service life and to prevent costly repairs or
possible water damage, we strongly recommend that the bottom of all plastic housings be
replaced every ten years. If the bottom of your housing has been in use for longer than this
period, it should be replaced immediately. Date the bottom of any new or replacement
housing to indicate the next recommended replacement date.
The US-640 is Tested and Certified by NSF International against NSF/ANSI
Standard 42 for the aesthetic reduction of Taste and Odor, Chlorine and Particulate
Class I. Standard 53 for the reduction of Lead, Mercury, Lindane, Atrazine, Cyst,
Asbestos, and Turbidity.
Technical Support: 1-800-645-5426
Mon–Fri., 7:30 AM–5 PM CST
11/03 145816 Rev B
Installation and Operating Instructions
Under-Sink Water Filter
Model US-640
NOTE:
• For cold water use only.
• Make certain that installation complies with all state and local laws and
regulations.
• The contaminants or other substances removed or reduced by the selected cartridge are
not necessarily in your water. Ask your local water municipality for a copy of their
water analysis, or have your private well tested by a reputable water testing lab.
• After prolonged periods of non-use (such as during a vacation) it is recommended that
the system be flushed thoroughly. Let water run for 5–6 minutes before using.
• The filter cartridge used with this system has a limited service life. Changes in taste,
odor, color, and/or flow of the water being filtered indicate that the cartridge should
be replaced.
