



⚡ Elevate your system’s efficiency with Flamco Flexvent – the smart vent that works as hard as you do!
The Flamco Flexvent Top 1/2 Inch Valve is a compact, automatic pressure relief valve crafted from durable brass. Designed for both domestic and commercial use, it supports glycol mixtures up to 50%, operates reliably between -10°C and 120°C, and withstands pressures up to 10 bar. Featuring a 1/2" female thread for easy installation and a protective chamber to keep the seal seat dirt-free, this valve ensures efficient, maintenance-free air venting with factory-tested quality assurance.






| Manufacturer | Flamco |
| Part Number | 28515 |
| Product Dimensions | 54 x 54 x 86 cm; 340 g |
| Item model number | 28515 |
| Colour | Brass |
| Material | Brass |
| Item Package Quantity | 1 |
| Maximum Pressure | 10 Bars |
| Included Components | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 340 g |
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Well engineered auto-vent that works very well!
The Flamco Flexvent Top is a well engineered 1/2" auto vent that is designed to live at the "top" of a heating system. It is a step-up in engineering from a 'bottle' auto vent and has roughly double the air venting capacity. In use, it vented my heating system of air in a few minutes. The previous 'bottle' vent took about an hour to do the same. The venting can be positively turned off with tapered valve once it has done its job; offering further reassurance that it won't leak water above your ceiling. It is designed to be more durable and can be dismantled for cleaning.The description Amazon provides is a bit confused as it conflates details from the 3/8" version; hence four stars. This is NOT the 3/8" white version with fitting sleeve and built in stop valve. You get the1/2" brass version that requires a male adapter sleeve to fit but it comes at a very good price from Amazon.
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