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! (957 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! (1335 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! (1326 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! (2058 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! (2217 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! (1676 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! (78 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! (144 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! (321 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! (415 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! (722 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! (108 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! (121 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! (186 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! (411 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! (388 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! (128 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! (69 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! (99 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! (2146 Available) Ships in 24-48 Hrs