Watts 0590721 Air Vent
The Watts 0590721 FV-4M1-1 Air Vent is a high-performance 1-inch automatic air vent valve designed for veteran contractors managing commercial and residential hydronic heating systems. Engineered with a rugged brass body construction, this vertical-pattern vent facilitates the continuous removal of trapped air from both hot and cold water distribution lines, preventing air lock and system noise. It features a 150 PSI maximum pressure rating and a temperature threshold up to 240°F, making it an essential component for high-duty cycles.
For technicians working with modern glycol systems, the FV-4M1-1 is equipped with a high-temperature resistant polyethylene float and a silicone rubber seal to ensure tight shut-off even during localized temperature spikes. The 1" male NPT connection allows for straightforward integration as an anti-vacuum device or for air dispersal at high points in the piping. The internal design is serviceable, allowing for full disassembly for cleaning and inspection without replacing the entire unit.
Key Benefits
- Maximum System Efficiency: Eliminates air pockets to prevent pump cavitation and uneven heating.
- High Temperature Compatibility: Rated for systems up to 240°F with specialized HVACR grade soft goods.
- Durable Brass Build: Corrosion-resistant brass cover and body ensure long-term reliability in aggressive hydronic environments.
- Serviceable Design: Can be easily disassembled for debris removal and maintenance.
- Glycol Ready: Fully compatible with glycol-water mixtures commonly found in closed-loop systems.
Common Questions
Can the Watts 0590721 be used with steam systems?
No, this air vent is specifically rated for hydronic (water and glycol) systems. It is not designed for steam applications.
What is the minimum pressure required for operation?
The valve requires a minimum working pressure of 1.45 PSI to maintain the internal seal via the float mechanism.
Does this vent work as an anti-vacuum device?
Yes, the FV-4M1-1 is designed to allow air to enter the system during draining, effectively preventing vacuum conditions.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $62.95
-65%$62.95
$22.03Watts 0590721 Air Vent
The Watts 0590721 FV-4M1-1 Air Vent is a high-performance 1-inch automatic air vent valve designed for veteran contractors managing commercial and residential hydronic heating systems. Engineered with a rugged brass body construction, this vertical-pattern vent facilitates the continuous removal of trapped air from both hot and cold water distribution lines, preventing air lock and system noise. It features a 150 PSI maximum pressure rating and a temperature threshold up to 240°F, making it an essential component for high-duty cycles.
For technicians working with modern glycol systems, the FV-4M1-1 is equipped with a high-temperature resistant polyethylene float and a silicone rubber seal to ensure tight shut-off even during localized temperature spikes. The 1" male NPT connection allows for straightforward integration as an anti-vacuum device or for air dispersal at high points in the piping. The internal design is serviceable, allowing for full disassembly for cleaning and inspection without replacing the entire unit.
Key Benefits
- Maximum System Efficiency: Eliminates air pockets to prevent pump cavitation and uneven heating.
- High Temperature Compatibility: Rated for systems up to 240°F with specialized HVACR grade soft goods.
- Durable Brass Build: Corrosion-resistant brass cover and body ensure long-term reliability in aggressive hydronic environments.
- Serviceable Design: Can be easily disassembled for debris removal and maintenance.
- Glycol Ready: Fully compatible with glycol-water mixtures commonly found in closed-loop systems.
Common Questions
Can the Watts 0590721 be used with steam systems?
No, this air vent is specifically rated for hydronic (water and glycol) systems. It is not designed for steam applications.
What is the minimum pressure required for operation?
The valve requires a minimum working pressure of 1.45 PSI to maintain the internal seal via the float mechanism.
Does this vent work as an anti-vacuum device?
Yes, the FV-4M1-1 is designed to allow air to enter the system during draining, effectively preventing vacuum conditions.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Shipping & Returns
Description
The Watts 0590721 FV-4M1-1 Air Vent is a high-performance 1-inch automatic air vent valve designed for veteran contractors managing commercial and residential hydronic heating systems. Engineered with a rugged brass body construction, this vertical-pattern vent facilitates the continuous removal of trapped air from both hot and cold water distribution lines, preventing air lock and system noise. It features a 150 PSI maximum pressure rating and a temperature threshold up to 240°F, making it an essential component for high-duty cycles.
For technicians working with modern glycol systems, the FV-4M1-1 is equipped with a high-temperature resistant polyethylene float and a silicone rubber seal to ensure tight shut-off even during localized temperature spikes. The 1" male NPT connection allows for straightforward integration as an anti-vacuum device or for air dispersal at high points in the piping. The internal design is serviceable, allowing for full disassembly for cleaning and inspection without replacing the entire unit.
Key Benefits
- Maximum System Efficiency: Eliminates air pockets to prevent pump cavitation and uneven heating.
- High Temperature Compatibility: Rated for systems up to 240°F with specialized HVACR grade soft goods.
- Durable Brass Build: Corrosion-resistant brass cover and body ensure long-term reliability in aggressive hydronic environments.
- Serviceable Design: Can be easily disassembled for debris removal and maintenance.
- Glycol Ready: Fully compatible with glycol-water mixtures commonly found in closed-loop systems.
Common Questions
Can the Watts 0590721 be used with steam systems?
No, this air vent is specifically rated for hydronic (water and glycol) systems. It is not designed for steam applications.
What is the minimum pressure required for operation?
The valve requires a minimum working pressure of 1.45 PSI to maintain the internal seal via the float mechanism.
Does this vent work as an anti-vacuum device?
Yes, the FV-4M1-1 is designed to allow air to enter the system during draining, effectively preventing vacuum conditions.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
