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MAID-O'-MIST STEAM VENTS
USAGE CHART FOR STEAM VENTS:
4)
For radiators in room in which thermostat is located; or where radiators
affect operation of thermostat.
5)
Venting capacity equal to 4 ordinary air valves. Use on radiators near boiler and in warm
rooms (second floor radiators, for example).
6)
Venting capacity equal to 15 ordinary valves. Use on radiators farther from boiler and
in cold rooms.
C)
Venting capacity equal to 15 ordinary air valves. Use on radiators farthest from boiler and in
coldest rooms (for example, on third floor radiators and above).
D)
Venting capacity equal to 27 ordinary air valves. Use when large amount of air must be
vented such as on radiators with particularly long branches and on very large radiators.
JACOBUS STEAM-VENTS
A vent port size for every room, from the largest size for the coldest rooms
to the smaller size for the "too hot" rooms. Easy to install on any radiator.
ANGLE PATTERN
No.
Series
Size
Vent
A885
4
1 8
"
.040
A886
5
1 8
"
.070
A887
6
1 8
"
.0935
A888
C
1 8
"
.1285
A889
D
1 8
"
.1850
12 per Box
STRAIGHT PATTERN
No.
Series
Size
Vent
A890-4
4
1 8
"
.040
A890-414
4
¼"
.040
A890
5
1 8
"
.070
A891
5
¼"
.070
A892
6
1 8
"
.0935
A893
6
¼"
.0935
A894
C
1 8
"
.1285
A895
C
¼"
.1285
A896
D
1 8
"
.1850
A897
D
¼"
.1850
12 per Box
STRAIGHT PATTERN
No.
Series
Size
Vent
A900
1
¾" x ½"
.1850
On basement mains install one or more No.1 air valves with
1 8
"
or
½"
,
¾"
combination vertical connection at the end
of the short main, or the main running to the warm side of
the building. Also install two or three No. 1 valves at the
end of a long main, or the main running to the cold side of
the building, depending on the building size.
12 per Box
MADE IN USA
MADE IN USA
MADE IN USA
C
6
5
6
4
D