Watts 590719 Water Float VentWatts 590719 Duo Vent 1 8" Water Float Vent delivers dependable air and water venting for hot water and boiler systems. Rated for up to 150 PSI and temperatures up to 240F, this vent helps prevent air locks, reduces pump chatter, and maintains system efficiency. The float mechanism automatically vents air while closing to minimize water loss, and it replaces FV4 1 8 for easy upgrades in existing plumbing. Designed for 1 8" lines, it fits standard

3-Blade Design

Temperature rating 20–281°F and pressure rating 35 PSIG (steam) / 87 PSI (water)

ensuring efficient operation for residential and commercial heating needs

Pressure rating: up to 15 PSI maximum

Designed to integrate with standard control assemblies

Stainless steel (stem)

CSA approved and housed in a crisp white rectangular cover

minimizing downtime while maintaining safe

a metal seat

7‑day programming (7 day

boosting energy efficiency and safe operation

Choose the Nordyne 922527 element for reliable performance