CALEFFI PLUMBVENT NA502640A Instructions Manual

www.caleffi.com

H0004951

PLUMBVENT™ Low-lead automatic air vent

© Copyright 2018 Caleffi

NA502640A

Function

Float type automatic air vent designed to vent air that is released
from the water at high points in piping. Example
applications include domestic hot water storage tanks and
recirculation system pump inlets. Compatible with plumbing
systems low-lead brass body certified and listed by ICC-ES.

Product range

Code NA502640A Low-lead automatic air vent ½” NPT male

Technical characteristics

Materials: Body: DZR low-lead brass
Seals: peroxide-cured EPDM

Performance: Max. working pressure: 150 psi (10 bar)
Max. discharge pressure: 90 psi (6 bar)
Max. discharge flow rate: 1.75 scfm (0.83 l/s)
Max.

NSF/ANSI 372-2011, Drinking Water System Components-Lead Content
Reduction of Lead in Drinking Water Act, California Health and Safety Code
116875 S.3874, Reduction in Drinking Water Act, certified by ICC-ES, file PMG-1360.

working temperature: 240°F (115°C)

Installation

The vent is installed in the vertical position on riser pipes and generally in parts of the system
where a concentration of air pockets is to be expected.

Operating instructions

The automatic air vent can be used for manual or automatic venting of hydronic and plumbing
systems. The automatic air vent is supplied complete with a safety hygroscopic cap that
automatically closes the air discharge in case of contact with water.

For normal automatic venting, keep hygroscopic cap closed for a slow release of air. A fast release
of the air may allow dirt or scale in the water to plug the operating mechanism. The small hole in
the side of the cap allows air to escape.

Service instructions

For optimum performance replace hygroscopic cap every 3 years. The natural cellulose fiber
washers can deteriorate over time when exposed to unfiltered or hard water.

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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.

WARNING: This product can expose you to chemicals including lead, which is known to the
State of California to cause cancer and birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov.

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 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.

CAUTION: If the air vent is not installed, commissioned and
maintained properly, according to the instructions contained in
this manual, it may not operate correctly and may endanger the user.

CAUTION: Make sure that all the connecting pipework is water tight.

CAUTION: Uncontrolled venting of water can occur with the automatic

air vent if dirt, scale, pipe joint compound or any other foreign materials
becomes trapped in the operating mechanism. Keep vent cap closed during
filling to prevent dirt from flowing into vent mechanism. Failure to follow
these instructions could result in property damage and/or personal injury.

CAUTION: Corrosion or leakage can cause damage or injury.
Periodically inspect for signs of corrosion or leakage. If corrosion or
leakage is noted, the vent must be replaced. Failure to follow thee
instructions could result in property damage and/or personal injury.

Caleffi shall not be liable for damages resulting from stress corrosion, misapplication or misuse of it products.

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