Specifications
Air Vents and Eliminators
252 customer.honeywell.com 70-6910
MaxiVent™—Air Vent for heating and cooling systems
The Maxivent features a low profile, fit anywhere solid brass body
and cover, and a high temperature polypropylene float.
Application: Residential or commercial heating and cooling systems
Materials (Body): Brass
Maximum Operating Temperature: 240 F (115 C)
Maximum Operating Pressure: 150 psi (1034 kPa)
Dimensions, Approximate: 2 in. high x 1 5/32 in. diameter
(51 mm high x 29 mm diameter)
AP400 Air Purger
Air Purgers provide efficient separation of air and water in
hydronic heating systems. Heavy duty cast bronze construction
with tappings for expansion tank and automatic air vent
mountings. Removes entrapped air with internal baffle design
through continuous recirculation of heating system water with use
of air vent. Improves system efficiency, reduces noise and helps
extend component life.
• Heavy Duty cast iron construction
• 1 inch, 1 1/4 and 1 1/2 inch models (inlet and outlet)
• 1/2 inch bottom tapping for expansion tank mount
• 1/8 inch top tapping for air vent mount
• Directional flow arrow for correct installation
Application: Closed heating systems
Materials (Body): Cast Iron
Maximum Operating Temperature: 275 F (135 C)
Maximum Operating Pressure: 125 psi (862 kPa)
Dimensions, Approximate: 6 in. long x 3-3/4 in. high x 2-3/8 in. wide
(152 mm long x 95 mm high x 60 mm wide)
Product Number Connection Type Connection Size
Weight
Description(lb) (kg)
FV147 Male NPT 1/8 in. 0.12 lb 0.06 kg 1/8 in. NPT Air Vent for heating and cooling systems
FV147A Male NPT 1/4 in. 0.12 lb 0.06 kg 1/4 in. NPT Air Vent for heating and cooling systems
Product Number Pipe Size Connection Type Connection Size
Weight
Description(lb) (kg)
AP400 1 in. Female NPT Bottom: 1/2 in.; Top: 1/8 in. 4.2 lb 1.9 kg 1 in. NPT Air Purger for closed heating systems
AP401 1 1/4 in. Female NPT Bottom: 1/2 in.; Top: 1/8 in. 3.8 lb 1.7 kg 1 1/4 in. NPT Air Purger for closed heating systems
AP402 1 1/2 in. Female NPT Bottom: 1/2 in.; Top: 1/8 in. 8.6 lb 3.9 kg 1 1/2 in. NPT Air Purger for closed heating systems