Series FV-4 automatic vent valves are used in commercial and residential hydronic heating applications to provide automatic air venting for hot or cold water distribution systems. It consists of a brass body construction with male NPT connection， brass cover， air vent with silicone rubber seal， polyethylene float with valve plug and automatic vent. Series FV-4M1 has a high temperature rating and is ideal for use with glycol systems or for use as an anti-vacuum device. It can also be installed to permit the separation and dispersal of air while fluid is circulating in the system. Can be disassembled for inspection and cleaning.

• Brand Name: Watts
• Vent Size: 1/8 in.
• Product Type: Automatic Vent Valve
• Connection Type: Straight Connection
• Material: Brass
• Maximum Pressure: 150 psi
• Minimum Working Pressure: 1.45 psi
• Temperature Range: 33 deg. F - 240 deg. F