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.

WATTS® Air Vent Valve, Automatic, Series: FV-4M1, 1/2 in Nominal, 1.45 to 150 psi, 33 to 240 deg F, Brass Body, Silicone Rubber Seal, 3-5/16 in H, Import

• Body and cover are brass construction
• Air vent with silicone rubber seal
• Impurities do not usually affect function as maximum float line of water is always lower than the valve seal
• Float is high temperature resistant polyethylene
• Suitable for use with glycol systems
• Can be disassembled for inspection and cleaning

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WATTS_0590715_Specification_Sheet.pdf https://hs-beta.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WATTS_0590715_Specification_Sheet.pdf