User Guide

Installation
The male threaded of check valve are installed into the system
while the system is drained and the temperature is below 100°F
(38°C). The desired component is threaded into the female
threads of the check valve. As the component is threaded into the
check valve, it pushes the spring loaded valve open. In a typical
installation, the check valve is mounted in the vertical position to
the bottom tap of an air separator between the expansion tank.
When the component is removed, the check valve closes,
mantaining the sealed system. When removing the component,
make sure valve does not unthread from the system.It is important
to reduce the system pressure before removing any component.
Service Instructions
There is no service required for the check valve.
CAUTION: Corrosion or leakage can cause damage or injury.
Periodically inspect for signs of corrosion or leakage. If corrosion or
leakage is note, the vent must be replaced. Failure to follow these
instructions could result in property damage and/or personal injury.
T max 250 F - P max 150 PSI
Made in Italy
Caleffi North America, Inc.
3883 West Milwaukee Road
Milwaukee, WI 53208
T: 414.238.2360 F: 414.238.2366
7-24-18
WARNING: System fluids are under pressure or temperature can be
hazardous. Be sure the pressure has been reduced to zero and the
system temperature is below 100°F (38°C). Failure to follow these
instructions could result in property damage and/or personal injury.