Watts FV-4M1 3/4 Air Vent, Brass, FNPT

The Watts FV-4M1 3/4 is a 3/4" brass air vent. It features a brass body. Rated to 150 psi.

This 3/4 inch automatic vent valve is 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 female NPT connection, brass cover, air vent with silicone rubber seal, polyethylene float with valve plug, and automatic vent. It 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. It can be disassembled for inspection and cleaning. The maximum pressure is 150 psi (10 bar).

Features

• Brass construction
• Air vent with silicon rubber seal
• Float is high temperature resistant polyethylene
• Suitable for use with glycol systems

Common Questions

What is it designed for?

It is intended for hydronic heating service.

Specifications

• Size: 3/4"
• Inlet Size: 3/4"
• Connection: FNPT
• Connection Gender: Female
• Body Material: Brass
• Max Pressure (psi): 150
• Application: Hydronic Heating
• Pack Quantity: 48
• Country of Origin: Italy
• Warranty: 1 Year Limited
• MPN: FV-4M1 3/4
• Lead-Free: No
• Component Role: Air Vent