CALEFFI PLUMBVENT NA502640A Instructions

PLUMBVENT™ Low-lead automatic air vent
© Copyright 2018 Caleffi

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.

Function

Float type automatic air vent designed to vent air that is released
from the water
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

Technical characteristics

Materials: Body:
Seals:
Performance: Max. working pressure:
Max. discharge pressure:
Max. discharge flow rate:
Max. working temperature:
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.
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at high points in piping.
Low-lead automatic air vent ½" NPT male
DZR low-lead brass
peroxide-cured EPDM
H0004951
NA502640A
Example
150 psi (10 bar)
90 psi (6 bar)
1.75 scfm (0.83 l/s)
240°F (115°C)