Bleed Key 5 mm EXEC BMD079 — valve air release tool for radiators and heating systems

EXEC BMD079 is a compact 5 mm bleed key designed for controlled venting of radiator and heating system valves. Made of metal, the tool engages standard 5 mm manual bleed screws to release trapped air and help restore proper circulation in hot water radiators and convectors. Its small size and simple shape make it convenient for routine maintenance in residential and small commercial heating installations.

Advantages

The bleed key provides a precise fit for 5 mm manual radiator valves, enabling gradual air release without damaging valve heads. Its metal construction ensures durability and resistance to repeated use, while the compact handheld design gives easy access in tight spaces between radiators and walls. The straightforward single-piece form requires no batteries or additional fittings, offering a reliable mechanical solution for air bleeding tasks.

Suitable for

• Bleeding air from domestic hot water radiators
• Servicing convectors and towel radiators
• Routine maintenance in small commercial heating systems
• Plumbing and heating DIY tasks requiring a 5 mm radiator key

Key specifications

• Tool type: manual radiator bleed key
• Bleed valve size compatibility: 5 mm
• Material: metal (single-piece construction)
• Form factor: compact, handheld
• Intended use: air release from radiator and heating system valves

How to use

Place the 5 mm end of the bleed key into the radiator bleed valve socket and turn slowly counterclockwise until you hear air escaping. Hold a cloth or small container under the valve to catch any water. Once a steady stream of water appears, turn the key clockwise to close the valve securely. Check system pressure and repeat bleeding on other radiators as required to restore balanced heating and proper circulation.

Usage recommendations

Use the bleed key when radiators are cool or only mildly warm to reduce the risk of scalding. After bleeding several radiators, verify the boiler or system pressure and top up following the manufacturer's instructions if necessary. Store the tool in a dry place to prevent corrosion and ensure a reliable fit on 5 mm bleed valves during future maintenance.