CAUTION
SAFETY INFORMATION
Intended Use:
The CUNO MCWS/CWS Series Residential Water Softener is intended for use in softening water in homes
and has not been evaluated for other uses. The system must be installed indoors near the point of entry of a
home water line, and be installed by qualified professional installers according to these installation instructions.
Read, understand, and follow all safety information contained in these instructions prior
to installation and use of the CUNO MCWS/CWS Series Residential Water Softener. Retain
these instructions for future reference.
EXPLANATION OF SIGNAL WORD CONSEQUENCES
WARNING
WARNING
Indicates a potentially hazardous situation, which, if not avoided, could result in
death or serious injury and/or property damage.
Indicates a potentially hazardous situation, which, if not avoided, may result in
property damage.
To reduce the risk associated with ingestion of contaminates due to use with water that is
microbiologically unsafe or of unknown quality:
• Do not use with water that is micriobiologically unsafe or of unknown quality without adequate
disinfection before or after the system.
To reduce the risk associated with a hazardous voltage due to installation on a home system
that requires use of the cold water system as a safety ground:
• If the home electrical system requires use of the cold water system as an electrical safety
ground, a jumper must be used to ensure the ground connection across the softener piping
— refer installation to qualified personnel.
To reduce the risk associated with back strain due to the heavy weight of the various system
components:
• Follow safe lifting procedures.
CAUTION
To reduce the risk associated with property damage due to water leakage:
• Installation must comply with existing state or local plumbing codes;
• Protect from freezing. Drain system when room temperature drops below 40°F (4.4°C);
• Do not install on systems where line pressures above 100 psi (689 kPa) may occur;
• Do not install system where water lines that could be subjected to vacuum conditions without
appropriate measures for vacuum prevention.
• Do not use pliers or pipe wrenches to tighten plastic fittings.
• Do not use pipe sealant on plastic fittings.
IMPORTANT NOTES
• The system should be installed on cold water lines only.
• SHUT OFF FUEL SUPPLY TO WATER HEATER after water is shut off.
• Failure to follow instructions may void warranty.
