Automatic Air Vent, 1 in, MNPT, Brass
PartWTTFV4M11
MFG0590721
Description
WATTS®, 0590721, Air Vent Valve, Automatic, Series: FV Series, 1 in Nominal, 1.45 to 150 psi Pressure, 33 to 240 deg F, Brass Body, Silicone Rubber Seal Softgoods, 3-1/2 in H Dimensions, Import
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- 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
- Brass construction
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.
| Type | Automatic |
| Nominal Size | 1 in |
| End Style | MNPT |
| Material | Brass |
| Body Material | Brass |
| Dimensions | 3-1/2 in H |
| Domestic/Import | Import |
| Pressure Rating | 150 psi |
| Softgoods Material | Silicone Rubber Seal |
| Temperature Rating | 33 to 240 deg F |
| Brand | WATTS® |
| Package Width | 3.5 in |
| Package Height | 1.75 in |
| UNSPSC | 40142500 |
| Alternate Part Number 1 | FV-4M1 |
| Package Length | 1.75 in |
| Country of Origin | IT |
| Manufacturer | Watts Water Technologies |
| UPC | 098268066692 |
| Manufacturer Part Number | 0590721 |
Limited
US Green Building Council|PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.
Hydronic Heating
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WATTS®Automatic Air Vent, 1 in, MNPT, Brass

