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SAFETY INSTRUCTION

This safety alert symbol will be used in this manual to draw attention to safety related
instructions. When used, the safety alert symbol means 

ATTENTION! BECOME ALERT!

YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
RESULT IN A SAFETY HAZARD

.

CAUTION:

All work must be performed by qualified personnel trained in the

proper application, installation, and maintenance of systems in accordance
with all applicable codes and ordinances.

CAUTION:

Over-tightening and breakage can occur with the use of Teflon

®

pipe joint compounds. Teflon

®

provides lubricity so that care must be

exercised not to over-tighten joints. Failure to follow these instructions
could result in property damage and /or personal injury.

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.

Function

Float type automatic air vent designed to vent air that is released

from the water while being heated. Check valve on 5027 series

allows for easy replacement of air vent without purging the system.

Technical Characteristics

Connection: 

1/8” NPT Male

1/4” NPT Male

Material:

Body Brass

Seals EPDM

Maximum Working Pressure:

Hot Water:

150 psi (10 bar)

Maximum Venting Pressure:

90 psi (6 bar)

Maximum Working Temperature:

240°F (115°C)

Automatic Air Vent -
Automatic Air Vent with check valve

38459.01

www.caleffi.com

CALEFFI

5026-5027 Series

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