Maid O' Mist Air Valves

Jacobus Air Valves are also referred to as Maid O' Mist Air Valves. They are designed for use in steam heating systems. There are many models of Jacobus Air Valves available on our website.

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  • #1, 3/4" x 1/2" Main Vent Valve View Specs
    • SKU: J1
    • Brand: Jacobus - Maid O Mist

    $14.55 / each

    $136.50 / box
    10 x $13.65

    In Stock! (1462 Available) Ships in 24-48 Hrs
  • #4, 1/8" Angle Air Valve View Specs
    • SKU: J4
    • Brand: Jacobus - Maid O Mist

    $7.15 / each

    $75.00 / box
    12 x $6.25

    In Stock! (1593 Available) Ships in 24-48 Hrs
  • #5, 1/8" Angle Air Valve View Specs
    • SKU: J5
    • Brand: Jacobus - Maid O Mist

    $7.15 / each

    $76.20 / box
    12 x $6.35

    In Stock! (2072 Available) Ships in 24-48 Hrs
  • #6, 1/8" Angle Air Valve View Specs
    • SKU: J6
    • Brand: Jacobus - Maid O Mist

    $7.15 / each

    $76.20 / box
    12 x $6.35

    In Stock! (3067 Available) Ships in 24-48 Hrs
  • #C 1/8" Angle Air Valve View Specs
    • SKU: JC
    • Brand: Jacobus - Maid O Mist

    $7.15 / each

    $76.20 / box
    12 x $6.35

    In Stock! (1978 Available) Ships in 24-48 Hrs
  • #D 1/8" Angle Air Valve View Specs
    • SKU: JD
    • Brand: Jacobus - Maid O Mist

    $7.15 / each

    $76.20 / box
    12 x $6.35

    In Stock! (2571 Available) Ships in 24-48 Hrs
  • #4, 1/8" Straight Air Valve View Specs
    • SKU: J4S8
    • Brand: Jacobus - Maid O Mist

    $7.79 / each

    $83.40 / box
    12 x $6.95

    In Stock! (241 Available) Ships in 24-48 Hrs
  • #5, 1/8" Straight Air Valve View Specs
    • SKU: J5S8
    • Brand: Jacobus - Maid O Mist

    $7.79 / each

    $83.40 / box
    12 x $6.95

    In Stock! (193 Available) Ships in 24-48 Hrs
  • #6, 1/8" Straight Air Valve View Specs
    • SKU: J6S8
    • Brand: Jacobus - Maid O Mist

    $7.79 / each

    $83.40 / box
    12 x $6.95

    In Stock! (226 Available) Ships in 24-48 Hrs
  • #C, 1/8" Straight Air Valve View Specs
    • SKU: JCS8
    • Brand: Jacobus - Maid O Mist

    $7.79 / each

    $83.40 / box
    12 x $6.95

    In Stock! (414 Available) Ships in 24-48 Hrs
  • #D, 1/8" Straight Air Valve View Specs
    • SKU: JDS8
    • Brand: Jacobus - Maid O Mist

    $7.79 / each

    $83.40 / box
    12 x $6.95

    In Stock! (557 Available) Ships in 24-48 Hrs
  • #4, 1/4" Straight Air Valve View Specs
    • SKU: J4S4
    • Brand: Jacobus - Maid O Mist

    $7.99 / each

    $85.80 / box
    12 x $7.15

    In Stock! (110 Available) Ships in 24-48 Hrs
  • #5, 1/4" Straight Air Valve View Specs
    • SKU: J5S4
    • Brand: Jacobus - Maid O Mist

    $7.99 / each

    $85.80 / box
    12 x $7.15

    In Stock! (28 Available) Ships in 24-48 Hrs
  • #6, 1/4" Straight Air Valve View Specs
    • SKU: J6S4
    • Brand: Jacobus - Maid O Mist

    $7.99 / each

    $85.80 / box
    12 x $7.15

    In Stock! (224 Available) Ships in 24-48 Hrs
  • #C, 1/4" Straight Air Valve View Specs
    • SKU: JCS4
    • Brand: Jacobus - Maid O Mist

    $7.99 / each

    $85.80 / box
    12 x $7.15

    In Stock! (331 Available) Ships in 24-48 Hrs
  • #D, 1/4" Straight Air Valve View Specs
    • SKU: JDS4
    • Brand: Jacobus - Maid O Mist

    $7.99 / each

    $85.80 / box
    12 x $7.15

    In Stock! (256 Available) Ships in 24-48 Hrs
  • #7, 1/8" Straight Auto Vent View Specs
    • SKU: 7
    • Brand: Jacobus - Maid O Mist

    $20.95 / each

    $99.75 / box
    5 x $19.95

    In Stock! (70 Available) Ships in 24-48 Hrs
  • #9AS Shortstop Automatic Shutoff Valve View Specs
    • SKU: 9AS
    • Brand: Jacobus - Maid O Mist

    $4.15 / each

    $39.50 / box
    10 x $3.95

    In Stock! (76 Available) Ships in 24-48 Hrs
  • #68, 1/4" Auto-Vent View Specs
    • SKU: MO68
    • Brand: Jacobus - Maid O Mist

    $11.15 / each

    In Stock! (222 Available) Ships in 24-48 Hrs
  • #67, 1/8" Auto-Vent View Specs
    • SKU: MO67
    • Brand: Jacobus - Maid O Mist

    $9.49 / each

    $89.50 / box
    10 x $8.95

    In Stock! (3496 Available) Ships in 24-48 Hrs