Caleffi 551022A Compact Air Separator

Compact Air Separator for heating and cooling systems keeps hydronic networks free of air pockets and operating quietly. The Caleffi 551022A Compact Air Separator combines a 3/4 inch nominal size with soldered end connections and a durable brass body.

Engineered for reliable air removal, this unit is rated up to 150 PSI and supports a temperature range of 32–250°F. With a 6 GPM flow rate, it suits both residential and light commercial loops. The assembly includes a stainless steel air vent with a guide pin, EPDM seal, and a PP air vent float to ensure steady operation and long service life.

• Nominal Size: 3/4 Inch
• End Connection: Soldered
• Body Material: Brass
• Flow Rate: 6 GPM
• Pressure Rating: 150 PSI
• Temperature Range: 32–250°F
• Vent Components: Stainless Steel Air Vent Float, EPDM Seal, PP Air Vent Float
• Applications: Heating and Cooling System
• Certifications: ANAB, BSI, FM, ISO 9001, ICIM, ANSI