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Air Valve (168)
Heating Specialty (2)
Orifice (2)
Solar Part (1)

System Type

Hydronic (Water) (80)
Steam (56)

Size

1/8" (82)
1/4" (29)
3/8" (3)
1/2" (33)
3/4" (28)
1" (1)
4" (1)

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(26)
(6)
(1)

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$1 to $5 (6)
$5 to $10 (12)
$10 to $15 (25)
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$20 to $25 (16)
$25 to $30 (8)
$30 to $35 (3)
$35 to $40 (9)
$40 to $45 (12)

Air Valves

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Product Image of 1/2" NPT Female DISCALAIR High Performance Automatic Air Vent
$86.52 each
In Stock
Get 11 by Tue, Jun 16
In Stock
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Product Image of 1/4" HAV Auto Air Vent
1/4" HAV Auto Air Vent
SKU: 0590713
Watts
SKU: 0590713
Brand: Watts
(2)
$22.86 each
In Stock
Get 116 by Tue, Jun 16
In Stock
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Product Image of Gorton No. 6 1/8" Straight Vapor Equalizing Valve
Gorton No. 6 1/8" Straight Vapor Equalizing Valve
SKU: G6S8
Gorton
SKU: G6S8
Brand: Gorton
(4)
$47.23 each
Out of Stock
Get it by Tue, Jun 30 - Wed, Jul 8
Out of Stock
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Product Image of 1/8" Straight Steam Air Valve
1/8" Straight Steam Air Valve
SKU: AVS-125
Matco-Norca
SKU: AVS-125
Brand: Matco-Norca
(1)
$13.37 each
BOX UP & SAVE 13%
$139.68 box of 12
$11.64 each
In Stock
Get 22 by Tue, Jun 16
In Stock
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Product Image of MINICAL Automatic Air Vent w/ Hygroscopic Safety Air Vent Cap (1/2" Straight Male Thread)
$22.28 each
In Stock
Get 10 by Tue, Jun 16
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Product Image of Gorton No. C, 1/8" Straight Vapor Equalizing Valve
$43.47 each
In Stock
Get 2 by Tue, Jun 16
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Product Image of Gorton No. 4, 1/8" Straight Vapor Equalizing Valve
$43.51 each
In Stock
Get 9 by Tue, Jun 16
In Stock
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Product Image of #7, 1/8" Straight Auto Vent
$38.94 each
In Stock
Get 12 by Tue, Jun 16
In Stock
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Product Image of #68, 1/4" Auto-Vent
$21.22 each
In Stock
Get 18 by Wed, Jun 17
In Stock
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Product Image of 1/2" NPT Male Service Check Valve
1/2" NPT Male Service Check Valve
SKU: 561402A
Caleffi
SKU: 561402A
Brand: Caleffi
(1)
$16.24 each
BOX UP & SAVE 13%
$141.30 box of 10
$14.13 each
In Stock
Get 10 by Tue, Jun 16
In Stock
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Product Image of 1/2" Automatic Air Vent Valve for Solar Heating Systems
$65.86 each
In Stock
Get 33 by Wed, Jun 17
In Stock
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Product Image of Model No. 67, 1/8" Automatic Air Vent (Male Threaded)
$53.90 each
In Stock
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In Stock
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Product Image of 1/8" NPT Hy-Vent Service Check Valve
1/8" NPT Hy-Vent Service Check Valve
SKU: 415-1
Taco
SKU: 415-1
Brand: Taco
(1)
$8.21 each
In Stock
Get 6 by Tue, Jun 16
In Stock
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Product Image of 74, 1/2" x 3/4" Straight Steam Unit Heater Air Valve
74, 1/2" x 3/4" Straight Steam Unit Heater Air Valve
SKU: 401429
Hoffman
SKU: 401429
Brand: Hoffman
(2)
$181.24 each
In Stock
Get 4 by Wed, Jun 17
In Stock
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Product Image of 1" FV4 Auto Air Vent
1" FV4 Auto Air Vent
SKU: 0590721
Watts
SKU: 0590721
Brand: Watts
$53.10 each
In Stock
Get 9 by Tue, Jun 16
In Stock
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Product Image of 75H, 1/2" x 3/4" Straight Steam Main Air Valve
$200.20 each
In Stock
Get 7 by Wed, Jun 17
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Product Image of Model No. 98, 1/2" High Capacity Automatic Air Vent (Female Threaded)
$117.60 each
In Stock
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Product Image of 1/4" NPT Manual Air Vent w/ Metal Seal & Adjustable Outlet
$11.55 each
In Stock
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Product Image of 1/4" Straight Steam Air Valve
1/4" Straight Steam Air Valve
SKU: AVS-250
Matco-Norca
SKU: AVS-250
Brand: Matco-Norca
(1)
$9.18 each
BOX UP & SAVE 11%
$97.92 box of 12
$8.16 each
In Stock
Get 24 by Tue, Jun 16
In Stock
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Product Image of Automatic air vent with built-in shut off valve, EPDM seat disc and O-ring
$41.26 each
In Stock
Get 8 by Tue, Jun 16
In Stock
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Product Image of 4, 1/2" x 3/4" Straight Steam Quick Valve
$121.80 each
In Stock
Get 3 by Tue, Jun 16
In Stock
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Product Image of 1/8" NPT Male Service Check Valve
1/8" NPT Male Service Check Valve
SKU: 59474A
Caleffi
SKU: 59474A
Brand: Caleffi
(5)
$10.78 each
In Stock
Get 25 by Tue, Jun 16
In Stock
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Product Image of #D, 1/8" Straight Air Valve
$13.78 each
In Stock
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In Stock
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Product Image of Model No. 107A, High Capacity Automatic Air Vent
$998.90 each
In Stock
Get 1 by Tue, Jun 16
In Stock
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Product Image of 1/8" Auto Vent for Hot Water & Steam
$19.54 each
In Stock
Get 20 by Tue, Jun 16
In Stock
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Product Image of 45, 3/4" x 1/2" Straight Steam Convector Air Valve
$74.90 each
In Stock
Get 3 by Tue, Jun 16
In Stock
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Product Image of #45-M 1/2" Female x 3/4" Male Vertical Radiator Steam Vent (Straight Shank)
$29.43 each
In Stock
Get 2 by Tue, Jun 16
In Stock
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Product Image of #C, 1/8" Straight Air Valve
$13.78 each
In Stock
Get 1 by Tue, Jun 16
In Stock
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Product Image of 76, 1/2" x 3/4" Straight Main Steam Vacuum Valve
$315.70 each
In Stock
Get 2 by Wed, Jun 17
In Stock
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Product Image of 1/8" Stubby Air Valve (Nickel Plated)
1/8" Stubby Air Valve (Nickel Plated)
SKU: 1701204
Wal-rich
SKU: 1701204
Brand: Wal-rich
(1)
$3.79 each
BOX UP & SAVE 13%
$78.96 box of 24
$3.29 each
In Stock
Get 49 by Tue, Jun 16
In Stock
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Product Image of Model No. 7, 1/8" Automatic Air Vent (Female Threaded)
$92.40 each
In Stock
Get 31 by Tue, Jun 16
In Stock
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Product Image of Gorton No. 6, 1/4" Straight Vapor Equalizing Valve
$44.61 each
In Stock
Get 6 by Tue, Jun 16
In Stock
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Product Image of 1/8" SVA Non-Vacuum Adjustable Float-Type Steam Air Vents
$30.26 each
In Stock
Get 20 by Tue, Jun 16
In Stock
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Product Image of Gorton No. D, 1/4" Straight Vapor Equalizing Valve
$48.32 each
In Stock
Get 3 by Tue, Jun 16
In Stock
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Product Image of Replacement Hygroscopic Cartridge (for 5080 Series)
$5.33 each
In Stock
Get 17 by Tue, Jun 16
In Stock
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Product Image of Gorton No. 5, 1/4" Straight Vapor Equalizing Valve
$43.20 each
In Stock
Get 3 by Tue, Jun 16
In Stock
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Product Image of Gorton No. 4, 1/4" Straight Vapor Equalizing Valve
$49.68 each
In Stock
Get 6 by Tue, Jun 16
In Stock
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Product Image of Gorton No. C, 1/4" Straight Vapor Equalizing Valve
$46.50 each
In Stock
Get 16 by Wed, Jun 17
In Stock
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Product Image of #74, 1/4" Auto-Vent
$38.04 each
In Stock
Get 4 by Tue, Jun 16
In Stock
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Product Image of #C, 1/4" Straight Air Valve
$13.78 each
In Stock
Get 3 by Tue, Jun 16
In Stock
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Product Image of #6, 1/8" Straight Air Valve
$21.21 each
In Stock
Get 5 by Tue, Jun 16
In Stock
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Product Image of 1/4" NPT Waste Connector
1/4" NPT Waste Connector
SKU: 414-1
Taco
SKU: 414-1
Brand: Taco
$7.96 each
In Stock
Get 289 by Tue, Jun 16
In Stock
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Product Image of Model No. 4V, 1/8" Coin Operated Air Vent (Male Threaded) (Pack of 48)
$351.18 each
In Stock
Get 17 by Tue, Jun 16
In Stock
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Product Image of 792, High Pressure Water Vent Valve
792, High Pressure Water Vent Valve
SKU: 401494
Hoffman
SKU: 401494
Brand: Hoffman
(1)
$581.70 each
In Stock
Get 2 by Wed, Jun 17
In Stock
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Product Image of Key Air Valve
Key Air Valve
SKU: CKU-102
Matco-Norca
SKU: CKU-102
Brand: Matco-Norca
$3.51 each
In Stock
Get 22 by Tue, Jun 16
In Stock
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Product Image of 1/2" NPT Male Air Vent Shut-Off, 150 PSI
$58.18 each
In Stock
Get 1 by Tue, Jun 16
In Stock
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Product Image of 1/4" NPT Male Service Check Valve
1/4" NPT Male Service Check Valve
SKU: 59804A
Caleffi
SKU: 59804A
Brand: Caleffi
$9.93 each
BOX UP & SAVE 6%
$93.10 box of 10
$9.31 each
In Stock
Get 6 by Tue, Jun 16
In Stock
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Product Image of #78, 1/8" Auto-Vent
$39.97 each
In Stock
Get 7 by Tue, Jun 16
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.