Products Automatic Air Valves Jacobus Steam Vents Float Control Valves Vertical Radiator
Steam Vents

Jacobus® Steam Vents

Models D, C, 6, 5 & 4

Maid-O'-Mist®/Jacobus® Steam Vents - 1/4 Inch Straight

1/4 Inch Straight

Maid-O'-Mist®/Jacobus® Steam Vents - 1/8 Inch Angle

1/8 Inch Angle

Maid-O'-Mist®/Jacobus® Steam Vents - 1/8 Inch Straight

1/8 Inch Straight

Maid-O'-Mist®/Jacobus® Steam Vents - Model 1

Model 1

A vent port size for every room, from the largest size for the coldest rooms to the smallest size for the "too hot" rooms.. Easy to install on any radiator.

ONLY these Maid-O'-Mist®/Jacobus® steam valves give you ALL these benefits!

16 Different Models
Self-Adjusting Thermostatic Control
Float to Prevent Water Escape
Reduces Radiator Noise
Cuts Fuel Consumption
Assures Even Heat Distribution
Lowers Operating Costs

MODEL	TYPE	PIPE SIZE	VENT SIZE	DESCRIPTION
4	Angle Straight Straight	1/8" 1/8" 1/4"	.040" .040" .040"	For radiators in room in which the thermostat is located; or where radiators affect operation of thermostat.
5	Angle Straight Straight	1/8" 1/8" 1/4"	.070" .070" .070"	Venting capacity equal to 4. ordinary air valves. Use on radiators near boiler and in warm rooms (second-floor radiators, for example).
6	Angle Straight Straight	1/8" 1/8" 1/4"	.0935" .0935" .0935"	Venting capacity equal to 8 ordinary air valves. Use on radiators farther ,from boiler and in cold rooms.
C	Angle Straight Straight	1/8" 1/8" 1/4"	.1285" .1285" .1285"	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	Angle Straight Straight	1/8" 1/8" 1/4"	.1850" .1850" .1850"	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.
1	Straight Main Vent	1/2" x 3/4"	.1850"	Designed to vent the air from the main lines, as well as on longer runs (depending on the size of the building). Has 1/2" x 3/4" combination vertical connection. Use one or more at the end of the short main, or the, main running to the warm side of the building. Also use two or three at the end of the long main, or the main running to the cold side of the building.

There's a Vent Port Size for Every Room

Maid-O'-Mist®/Jacobus® Steam Vents - Improved Nickel-Plated Brass Body - Improved Valve Seat - Improved Solid Float - Improved Bi-Metal Thermostatic Element

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