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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.

Caleffi Air Eliminators

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.

Caleffi 5026 series air eliminator
These air eliminators feature:
  • Brass body and cover with silicone rubber operating mechanism
  • Sturdy, reliable EPDM seals
  • Max working pressure: 150 psi
  • Max discharge pressure: 90 psi
  • Max discharge rate: 1.75 SCFM
  • Max working temperature: 240°F
  • View detailed specifications
Model Pipe Size Max Pressure Max Temp Dimensions Price & Quantity
502610A 1/8" NPT 150 psi 240° F 3-1/16" x 1-9/16" $19.36
502620A 1/4" NPT 150 psi 240° F 3-1/16" x 1-9/16" $20.69
502243A 1/2" NPT 150 psi 240°F 3.5" x 1.37" $48.17
If using model 502243A on an existing 3/4" NPT fitting, you'll need a 3/4" x 1/2" stainless bushing - $4.09
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Honeywell-Sparco Floatvent "GoldTop" Automatic Vents

Honeywell-Sparco Floatvent automatic vent
These automatic vents feature:
  • Efficient automatic vent with high venting capacity
  • Removes trapped air that prevents free circulation of liquids
  • Restores maximum performance of tanks, radiators, pipelines, radiant panels, unit heaters and systems, etc.
  • For continuous venting of hot water and chilled water cooling systems
  • Works automatically when used in open circulation systems
  • Can be used for manual operation in closed circulating systems
Model Pipe Size Max Pressure Max Temp Dimensions Price & Quantity
FV180 1/8" NPT 150 psi 240°F 1.84" x 3.25" $22.04
FV180A 1/4" NPT 150 psi 240°F 1.84" x 3.25" $20.13
FV183 3/4" NPT 150 psi 240°F 3.5" x 1.37" $54.75
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Honeywell-Sparco MaxiVent Automatic Vents

Honeywell-Sparco Maxivent automatic vent
These automatic vents feature:
  • Low profile, fit anywhere solid brass body and cover with a high temperature polypropylene float
  • Removes trapped air that prevents free circulation of liquids
  • Restores maximum performance of tanks, radiators, pipelines, radiant panels, unit heaters and systems, etc.
  • Works automatically when used in open circulation systems
  • Can be used for manual operation in closed circulating systems
Model Pipe Size Max Pressure Max Temp Dimensions Price & Quantity
FV147 1/8 NPT 150 psi 240°F 2" x 1.43" $12.39
FV147A 1/4 NPT 150 psi 240°F 2" x 1.43" $12.41
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Honeywell-Sparco SuperVent Automatic Vent

Honeywell-Sparco SuperVent automatic vent
These automatic vents feature:
  • High venting capacity that incorporates a check valve
  • Removes trapped air that prevents free circulation of liquids
  • Restores maximum performance of tanks, radiators, pipelines, radiant panels, unit heaters and systems, etc.
  • Works automatically when used in open circulation systems
  • Can be used for manual operation in closed circulating systems
  • Max working pressure: 150 psi
  • Max working temperature: 240°F
  • Dimensions: 2.86" x 2.04"
  • Replacement parts are available below
SuperVent SV173 Automatic Vent 3/8" NPT - $98.63
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Honeywell-Sparco PV Series Residential SuperVent Automatic 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. The SuperVent 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.

Honeywell-Sparco SuperVent 3/4-inch residential automatic vent
These residential air vents feature:
  • 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 with SuperVent air release
  • 360 degree rotational SuperVent collar ring for vent installation flexibility
  • Removable vent top for cleaning
  • Bronze/stainless construction
  • 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
  • Dynamic concentrator has 3X more air collection power than standard air vents
  • 125 psi maximum working pressure
  • 240° F. maximum operating temperature
  • Replacement parts are available below
PVU (NPT universal) models have bottom connections the same size as the inlet and outlet connections for vertical piping installation

NPT Connection

Model Pipe Size Max GPM Price & Quantity
PV075 3/4" 13 $138.61
PV100 1" 22 $144.07
PV125 1-1/4" 38 $181.33
PV150 1-1/2" 53 $238.22
PV200 2" 95 $283.12
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NPT Universal Connection

Model Pipe Size Max GPM Price & Quantity
PVU125 1-1/4" 36 $176.62
PVU150 1-1/2" 50 $250.92
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Sweat Connection

Model Pipe Size Max GPM Price & Quantity
PV075S 3/4" 13 $138.65
PV100S 1" 22 $144.46
PV125S 1-1/4" 38 $182.23
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Honeywell-Sparco Repair Parts for Powervent and SuperVent

Replacement air vent assembly
PV001RP Replacement Air Vent Assembly includes:
  • Top cap with straight vertical vent outlet
  • Float
  • O-ring for old style (pre-2004) PV series models
PV020RP Replacement Air Vent Assembly includes:
  • Top cap with 90° vent outlet
  • Float
Model Description Price & Quantity
PV001RP Powervent Replacement Top Assembly (straight vent outlet - pre 2004) $14.47
PV020RP Powervent/SuperVent Replacement Top Cap Assembly (90° vent outlet) $53.87
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Honeywell-Sparco Air Purgers

Honeywell-Sparco air purger
These air purgers feature:
  • Provides air and water separation in hydronic heating systems
  • Improves the efficiency and reduces noise of your closed heating system
  • Heavy duty cast iron construction
  • Directional flow arrow to ensure correct installation
  • 1/2" bottom tapping for expansion tank mounting
  • 1/8" top tapping for air vent mounting
  • Stamping on sides may vary
Model Pipe Size Max Pressure Max Temp Dimensions Price & Quantity
AP400 1" NPT 275°F 125 psi 6" x 3-3/4" x 2-3/8" $41.47
AP401 1-1/4" NPT 275°F 125 psi 6" x 3-3/4" x 2-3/8" $43.88
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Honeywell EA122A Automatic Air Vent for Non-Heating System Applications

Honeywell automatic air vent
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
  • EPDM 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
  • Max operating pressure: 90 psi
  • View an air capacity graph
Honeywell EA122A1028 Automatic Air Vent 1/8" NPT - $51.14
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Related Items & Accessories



Frequently Asked Questions

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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