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Air Valve (169)
Heating Specialty (2)
Orifice (2)
Solar Part (1)

System Type

Hydronic (Water) (81)
Steam (56)

Size

1/8" (82)
1/4" (30)
3/8" (3)
1/2" (33)
3/4" (28)
1" (1)
4" (1)

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(6)
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$1 to $5 (6)
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$30 to $35 (3)
$35 to $40 (7)
$40 to $45 (15)

Air Valves

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Product Image of 1/8" Hy-Vent
1/8" Hy-Vent
SKU: 400-4
Taco
SKU: 400-4
Brand: Taco
(132)
$14.01 each
In Stock
Get 439 by Mon, Jun 8
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Product Image of 1/8" Male NPT MINICAL Automatic Air Vent
1/8" Male NPT MINICAL Automatic Air Vent
SKU: 502015A
Caleffi
SKU: 502015A
Brand: Caleffi
(19)
$14.26 each
In Stock
Get 824 by Mon, Jun 8
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Product Image of MINICAL Automatic Air Vent w/ Hygroscopic Safety Air Vent Cap (1/2" NPT)
$19.14 each
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Product Image of 1/8" Combination Coin/Key Air Valve (Nickel Plated)
$1.44 each
BOX UP & SAVE 12%
$31.75 box of 25
$1.27 each
In Stock
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Product Image of Varivalve Adjustable Angle Air Valve
$27.54 each
In Stock
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Product Image of #67, 1/8" Auto-Vent
$16.57 each
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Product Image of Gorton No. 1, 3/4" x 1/2" Air Eliminator (Main Vent Valve)
$47.97 each
In Stock
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Product Image of 79, 1/2" x 3/4" Straight Water Main Vent Valve
$192.50 each
In Stock
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Product Image of 1/8" High Capacity Auto Air Vent
1/8" High Capacity Auto Air Vent
SKU: 502610A
Caleffi
SKU: 502610A
Brand: Caleffi
(3)
$12.61 each
BOX UP & SAVE 9%
$137.04 box of 12
$11.42 each
In Stock
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Product Image of 1/8" MPS Float Air Vent
1/8" MPS Float Air Vent
SKU: 700-30
Amtrol
SKU: 700-30
Brand: Amtrol
(31)
$14.25 each
BOX UP & SAVE 6%
$321.36 box of 24
$13.39 each
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Product Image of Key for Air Valve
Key for Air Valve
SKU: KEY-100
Matco-Norca
SKU: KEY-100
Brand: Matco-Norca
(4)
$0.50 each
In Stock
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Product Image of 1/8" SlimLine Hy-Vent
1/8" SlimLine Hy-Vent
SKU: 416-2
Taco
SKU: 416-2
Brand: Taco
(14)
$11.45 each
BOX UP & SAVE -0%
$160.30 box of 14
$11.45 each
In Stock
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Product Image of 1/8" Automatic Hygroscopic Air Vent
1/8" Automatic Hygroscopic Air Vent
SKU: 508013A
Caleffi
SKU: 508013A
Brand: Caleffi
(22)
$6.56 each
BOX UP & SAVE 8%
$151.00 box of 25
$6.04 each
In Stock
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Product Image of 1/2" FNPT x 3/4" MNPT Hy-Vent
1/2" FNPT x 3/4" MNPT Hy-Vent
SKU: 418-4
Taco
SKU: 418-4
Brand: Taco
(21)
$65.92 each
In Stock
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Product Image of 40, 1/8" Angle Steam Radiator Air Valve
40, 1/8" Angle Steam Radiator Air Valve
SKU: 401440
Hoffman
SKU: 401440
Brand: Hoffman
(55)
$42.00 each
In Stock
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Product Image of Coin Key Air Valve (Nickel Plated)
$2.30 each
In Stock
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Product Image of 3/4" NPT Goldtop Air Vent (150 PSI), FV183
$21.10 each
In Stock
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Product Image of 1/4" NPT Float Type Automatic Air Vent 150 PSI, 240F, FV180A
$16.14 each
In Stock
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Product Image of Air Valve Key
Air Valve Key
SKU: 1701208
Wal-rich
SKU: 1701208
Brand: Wal-rich
(5)
$0.47 each
BOX UP & SAVE 13%
$10.25 box of 25
$0.41 each
In Stock
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Product Image of Gorton No. 6 Angle Vapor Equalizing Valve
$36.17 each
In Stock
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Product Image of 1/8" Adjustable Angle Steam Radiator Air Vent
$22.43 each
In Stock
Get 338 by Mon, Jun 8
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Product Image of Varivalve Adjustable Straight Valve
$23.11 each
In Stock
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Product Image of Gorton No. 2 Straight Air Eliminator
$158.92 each
In Stock
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Product Image of Gorton No. 5 Angle Vapor Equalizing Valve
$40.03 each
In Stock
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Product Image of Gorton No. C, Angle Vapor Equalizing Valve
$40.04 each
In Stock
Get 18 by Mon, Jun 8
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Product Image of 1A, 1/8" Adjustable Angle Steam Radiator Air Valve
$71.40 each
In Stock
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Product Image of Gorton No. 4 Angle Vapor Equalizing Valve
$40.04 each
In Stock
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Product Image of 75, 1/2" x 3/4" Straight Steam Main Air Valve
$188.30 each
In Stock
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Product Image of Model No. 97, 1/8" Automatic Air Vent (Male Threaded)
$17.85 each
In Stock
Get 151 by Mon, Jun 8
In Stock
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Product Image of #1, 3/4" x 1/2" Main Vent Valve
$25.13 each
In Stock
Get 67 by Mon, Jun 8
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Product Image of 1/2" High Capacity Auto Air Vent
1/2" High Capacity Auto Air Vent
SKU: 502243A
Caleffi
SKU: 502243A
Brand: Caleffi
(3)
$29.11 each
In Stock
Get 82 by Mon, Jun 8
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Product Image of Gorton No. D Angle Vapor Equalizing Valve
$43.46 each
In Stock
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Product Image of 1/8" NPT Air Vent - 150 psi, 240F, FV147
$8.93 each
In Stock
Get 238 by Mon, Jun 8
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Product Image of #5, 1/8" Angle Air Valve
$14.73 each
In Stock
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Product Image of 1/8" FV4 Auto Air Vent
1/8" FV4 Auto Air Vent
SKU: 0590715
Watts
SKU: 0590715
Brand: Watts
(45)
$17.07 each
In Stock
Get 204 by Mon, Jun 8
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Product Image of 1/8" Automatic Air Vent with Check Valve
1/8" Automatic Air Vent with Check Valve
SKU: 502710A
Caleffi
SKU: 502710A
Brand: Caleffi
(14)
$17.58 each
In Stock
Get 96 by Mon, Jun 8
In Stock
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Product Image of Radiator Bleeding Key
Radiator Bleeding Key
SKU: H240400
Apollo Valves
SKU: H240400
(4)
$2.56 each
In Stock
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Product Image of 3/4" FV-4M1 Auto Air Vent
3/4" FV-4M1 Auto Air Vent
SKU: 0590723
Watts
SKU: 0590723
Brand: Watts
$38.29 each
In Stock
Get 46 by Mon, Jun 8
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Product Image of #6, 1/8" Angle Air Valve
$14.73 each
In Stock
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Product Image of 1/8" Male NPT MINICAL Automatic Air Vent w/ Service Check Valve and Hygroscopic Anti-Drip Cap
$18.76 each
In Stock
Get 62 by Mon, Jun 8
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Product Image of #4, 1/8" Angle Air Valve
$14.73 each
In Stock
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Product Image of 1/8" Angle Adjustable Chrome-Plated Radiator Air Vent
$8.29 each
In Stock
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Product Image of #D 1/8" Angle Air Valve
$14.73 each
In Stock
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In Stock
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Product Image of 1/8" NPT Goldtop Universal Air Vent - Heating/Cooling Systems, FV180
$16.87 each
In Stock
Get 81 by Mon, Jun 8
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Product Image of #C 1/8" Angle Air Valve
$14.73 each
In Stock
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In Stock
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Product Image of 1/4" FV-4M1 Auto Air Vent
1/4" FV-4M1 Auto Air Vent
SKU: 0590716
Watts
SKU: 0590716
Brand: Watts
(14)
$21.38 each
In Stock
Get 90 by Mon, Jun 8
In Stock
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Product Image of Automatic Air Vent with Built-in Shutoff Valve for Hydronic Heating Systems
$38.20 each
In Stock
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Product Image of 1/8" Male NPT MINICAL Automatic Air Vent w/ Service Check Valve
1/8" Male NPT MINICAL Automatic Air Vent w/ Service Check Valve
SKU: 502115A
Caleffi
SKU: 502115A
Brand: Caleffi
(20)
$25.71 each
In Stock
Get 14 by Mon, Jun 8
In Stock
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Resources
FAQs, Manuals & Videos
Articles
More About Air Valves
The function of the radiator air valve or air vent is to provide a means for air to be driven out of the radiator as steam enters. A quality radiator air valve will provide quieter and faster heating radiators. Air valves are differentiated by orifice size, and selecting a radiator valve is determined by the radiator's distance from the boiler. A main vent with a large orifice should be installed closest to the boiler. A radiator located on the 2nd floor of a home should have an air valve with a smaller orifice. Air valves are available in straight or angle configurations and can be serviced simply by unscrewing the vent cap.

We offer a wide selection of Taco, Watts, Hoffman, Gorton, Varivalve, and Jacobus air valves suitable for your heating system.