Caleffi 551035A Air Separator

The Caleffi 551035A Air Separator is engineered to remove entrapped air from heating and cooling systems, ensuring efficient operation and quieter performance. This brass-bodied air separator carries a nominal size of 1-1/4 inch and uses solder end connections for a secure, leak-free installation.

Built for reliability, it operates at up to 150 PSI and withstands temperatures from 32 to 250°F, delivering a flow rate of 9.3 GPM. Key components include a stainless steel air vent with a float guide pin, an EPDM seal, and a PP air vent float, all designed to stand up to demanding hydronic service.

Ideal for both heating and cooling applications, the Caleffi 551035A complies with multiple industry standards (ANAB, BSI, FM, ISO 9001, ICIM, ANSI), offering confident performance in modern systems.

• Nominal Size: 1-1/4 inch
• End Connections: Solder
• Flow Rate: 9.3 GPM
• Pressure Rating: 150 PSI
• Temperature Range: 32–250°F
• Materials: Brass body; EPDM seal; Stainless steel air vent float guide pin; PP air vent float
• End-to-End Distance: 5-3/16 inch
• Applications: Heating and cooling systems