| Connection Type | : | NPT |
| Dimensions | : | 1-5/8 in Dia |
| Material | : | Brass |
| Nominal Size | : | 1/4 in |
| Pressure Rating | : | 1.45 to 150 psi |
| Series | : | FV-4 Series |
| Temperature Rating | : | 240 deg F |
This 1/4 in automatic air 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 FNPT 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.
WATTS® Air Vent Valve, FV-4 Series, 1/4 in Nominal, NPT Connection, 1.45 to 150 psi, 240 deg F, Brass, 1-5/8 in Dia
- Air vent with silicon rubber seal
- Float is high temperature-resistant polyethylene
- Suitable for use with glycol systems