The 74003 from Webstone is a 1-1/4” Threaded Air Separator. This item is designed to eliminate trapped air associated with start-up and maintenance of any hydronic system. 

Features:

• 1-1/4" Threaded Air Separator;
• Removable vent head allows for easy maintenance;
• Bi-directional flow;
• Reduces system noise and improves operating efficiency;
• Guaranteed for life.

Technical Specifications:

• System connections: 1-1/4" Threaded (FNPT x FNPT);
• Bottom tapping: 1/2" Threaded (FNPT);
• Max. pressure: 150 psi;
• Max. flow: 15 GPM;
• Dimensions (H x W): 6-1/4" x 3-7/8";
• Materials of construction: forged brass body, st. steel mesh screen, EPDM rings.