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Air Eliminators and Automatic Air Vents

During filling, maintenance, or through oxygen infiltration, air is introduced into every hydronic heating/cooling system. To function properly, the air must be eliminated and these air eliminators are designed to remove trapped air, micro bubbles and dirt from heating, cooling and domestic water systems. We are your source for air eliminators and many other heating and cooling parts and products.

Air Eliminators

air eliminator
These float-type automatic air vents are designed to be installed vertically to vent air that is released from the water by being heated. Silicon seals, anti-vibration and anti-rotation features ensure long life and superior venting.
Model # Description Max. Pressure Max. Temp. Dimensions Price & Quantity
502610A 1/8" NPT 150 psi 240° F 3-1/16" x 1-9/16" $17.29
502620A 1/4" NPT 150 psi 240° F 3-1/16" x 1-9/16" $18.47
502243A 1/2" NPT 150 psi 240°F 3.5" x 1.37" $44.19
If using the #502243A on an existing 3/4" NPT fitting, please use a 3/4" x 1/2" stainless bushing $3.56

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Floatvent, Supervent, Maxivent

maxivent
Maxivent FV 147/147A
  • The Sparco Floatvent is an efficient automatic vent with high venting capacity. It removes trapped air that prevents free circulation of liquids and restores maximum performance of the system. Floatvents are used for continuous venting of hot water and chilled water cooling systems. The Floatvent removes air from tanks, radiators, pipelines, radiant panels, unit heaters and systems.
  • The Maxivent features a low profile, fit anywhere solid brass body and cover, and a high temperature polypropylene float.
  • The Supervent has a high venting capacity and incorporates a check valve. Replacement parts for the Supervent are available below
  • These air vents work automatically when used in open circulation systems, and can be used for manual operation in closed circulating systems.
Model # Description Max. Pressure Max. Temp. Dimensions Price & Quantity
FV 147 1/8 NPT 150 psi 240°F 2" x 1.43" $11.06
FV 180 1/8 NPT 150 psi 240°F 1.84" x 3.25" $19.68
FV 180A 1/4 NPT 150 psi 240°F 1.84" x 3.25" $19.69
FV 147A 1/4 NPT 150 psi 240°F 2" x 1.43" $11.08
FV 183 3/4" NPT 150 psi 240°F 3.5" x 1.37" $50.23
SV 173 3/8 NPT with check 150 psi 240°F 2.86" x 2.04" $90.49

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Air Purger

Air purger
Stamped Sparco or Honeywell on side

Air Purger
Model # Size Connection Max Temp. Max Pressure Dimensions Price & Quantity
AP 400 1" bottom 1/2", top 1/8" 275°F 125 psi 4" x 2.5" x 1" $37.36
AP 401 1-1/4" bottom 1/2", top 1/8" 275°F 125 psi 4" x 2.5" x 1" $40.26

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Supervent - Residential

powervent/supervent air eliminator PV-075PV-075
NPT Supervent
powervent/supervent air eliminator PV-100PV-100
Sweat Supervent
powervent/supervent air eliminator PVU075PVU075
Universal Supervent

During filling, maintenance or through oxygen infiltration, air is introduced into every hydronic heating/cooling system. To function properly, the air must be eliminated. The Sparco/Honeywell Supervent/Powervent slows the velocity of the water in its enlarged chamber, where the water impacts onto a stainless steel dynamic concentrator. The concentrator merges bubbles and micro bubbles, which then float through to the top of the Supervent where they are vented to the outside. The high capacity vent keeps the water level below the venting point for a clean vent nozzle. The Supervent offers the largest venting rate at pressures up to 125 psi for residential models and 150 psi for commercial Powervent models.

Residential Unit Features:

  • Guarantees heating and cooling systems startup
  • Eliminates customer call backs for systems not working properly because air has stopped proper fluid circulation
  • Helps prevent pipe and valve corrosion by air elimination
  • Low pressure drop, high bi-directional flow
  • Supervent air release
  • 360 degree rotational Supervent collar ring for vent installation flexibility
  • Removable vent top for cleaning
  • Bronze/stainless construction
  • Manufacturer 1 year warranty
  • Best venting performance in high and low pressure systems
  • 1/2" fipt bottom plug for clean out or remove for mounting an expansion tank, or connect blow-down valve for sediment removal in dirty systems
  • PVU (universal) models have bottom connections the same size as the inlet and outlet connections for vertical piping installation option
  • Dynamic concentrator has three times more air collection power than standard air vents
  • 125 PSI maximum working pressure
  • 240° F. maximum operating temperature
  • View illustration of how the powervent works
  • Replacement parts are available below
Powervent / Supervent - Residential
Model # Description Max temp Max pressure Max. GPM Price & Quantity
PV075 3/4" NPT 240°F 125 psi 13 $128.34
PV100 1" NPT 240°F 125 psi 22 $133.40
PV125 1-1/4" NPT 240°F 125 psi 38 $167.90
PV150 1-1/2" NPT 240°F 125 psi 53 $224.74
PV200 2" NPT 240°F 125 psi 95 $267.09
PV075S 3/4" sweat 240°F 125 psi 13 $128.38
PV100S 1" sweat 240°F 125 psi 22 $133.76
PV125S 1-1/4" sweat 240°F 125 psi 38 $168.73
PVU075 3/4" NPT
universal
240°F 125 psi 12 $130.53
PVU125 1-1/4" NPT
universal
240°F 125 psi 36 $163.54
PVU150 1-1/2" NPT
universal
240°F 125 psi 50 $236.72

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Powervent / Supervent - Commercial

honeywell supervent-powervent commercial air eliminator
PV200T

Commercial Unit Features:

  • Guarantees heating and cooling systems work when needed
  • Eliminates customer call backs for systems not working properly because air has stopped proper fluid circulation
  • Helps prevent pipe and valve corrosion by air elimination
  • 360 degree rotational collar ring for vent installation flexibility
  • Removable vent top for cleaning
  • Powervent includes Supervent air release
  • Commercial units include vent check to be installed between the powervent body and the supervent
  • Low pressure drop, high bi-directional flow
  • Welded steel housing
  • Manufacturer 1 year warranty
  • Best venting performance in high and low pressure systems
  • All models have bottom 3/4" NPT connections for easy periodical purging of dirt from the system
  • Dynamic stainless steel concentrator wires create three times more air collection power than regular air vents
  • FC models have blind flange at bottom of unit that can be removed to remove and clean the concentrator
  • 150 PSI maximum working pressure
  • 250° F. maximum operating temperature
  • View illustration of how the powervent works
  • Replacement parts are available directly below
Powervent / Supervent - Commercial
Model # Description Max temp Max pressure Max. GPM Price & Quantity
PV200T 2" NPT 240°F 150 psi 95 $774.55
PV300T 3" NPT 240°F 150 psi 215 $1,461.00

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Repair Parts for Powervent and Supervent

powervent supervent replacement top with float
Supervent repair part features:
  • PV-001RP Replacement air vent assembly includes top cap with straight vertical vent outlet, float, and o-ring for old style PV series pre 2004 models
  • PV-020RP Replacement air vent assembly includes top cap with 90° vent outlet and float (pictured)
  • Complete supervent air vent replacement SV 173 sold above
Model Description Price & Quantity
#PV-001RP Powervent Replacement Top Assembly (straight vent outlet), Float, O-ring (pre 2004) $12.92
#PV-020RP Powervent/Supervent Replacement Top Cap Assembly (90° vent outlet), Float $49.42

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EA122A Automatic Air Vent for Non-Heating System Applications

Air vent # EA122A1028
This automatic air vent features:
  • Includes removable float/valve assembly for easy servicing.
  • Not for use in steam systems.
  • Body, cover and float assembly made of thermoplastics.
  • Internal parts made of corrosion-resistant and chemical-resistant materials for use with water systems containing light concentrations of propylene glycol, mineral oils, or petroleum-based oils.
  • Oil resistant seal.
  • NBR seat disc and O-ring.
  • Maintains quiet and efficient operation.
  • Built-in brass shutoff valve for servicing without system shutdown.
  • Built-in vacuum breaker.
  • Leakage guard safeguards operation.
  • View an air capacity graph
Model # Description Price & Quantity
EA122A1028 Automatic air vent with built-in shut off valve; EPDM seat disc and O-ring. 1/8" NPT male thread, 90 psi max. $46.92

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Related Items & Accessories



Frequently Asked Questions

Q. "Can the hygrovent automatic air vents be installed horizontally?"
A. No, these units must be installed vertically.

Q. "What does bi-directional flow mean?"
A. Bi-directional flow means fluid can flow through the valve in both directions. The inlet and outlet can be reversed and the valve will still function properly.

Q. "What is the difference between an open and closed circulation system?"
A. A closed system is a recirculation loop for water (or other liquid) where once it is set up and running, no new liquid will be introduced into the system, unless the system is shut down for servicing. Most hydronic heating systems, like radiators or radiant floor heating, use a separate boiler or water heater not connected to the main water supply, so the same liquid is constantly circulated through the piping and/or to the radiators back through the boiler or water heater.

An open system is a recirculating loop for heating water when the water heater is connected to the main water supply. As water is constantly being used throughout the house in the kitchen, bath, etc., the water is instantly replaced as fresh water is introduced into the water heater from the main water supply. These types of systems can be used for radiant floor heating and other hydronic heating applications.


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