PlumbEZ Slimline Automatic Air Vent 15mm Compression – Brass Self-Bleeding Float Valve for Radiators, Boilers & Central Heating Systems – Compact Leak-Resistant Heating Accessory

• Automatic air vent for radiators & boilers — PlumbEZ slimline brass self-bleeding float valve continuously releases trapped air in closed-loop central heating systems, reducing gurgling, cold spots and corrosion.
• 15mm compression connection — Quick, secure fit to standard 15 mm copper or barrier pipework; ideal for boiler flow/return headers, radiator risers, airing cupboards, towel rails and distribution manifolds.
• Reliable float-operated mechanism — Opens when air accumulates and seals when water rises for low-maintenance, leak-resistant operation; install upright/vertical at high points for best air elimination.
• Durable brass construction — Built for domestic and light commercial hydronic environments; compatible with common corrosion inhibitors and glycol antifreeze blends used in sealed systems.
• Compact, easy install — Slimline profile fits tight spaces and replaces manual radiator bleed valves/older boiler air vents to restore quiet circulation, balanced radiators and consistent heat output.

The PlumbEZ Slimline Automatic Air Vent (15 mm Compression) is a compact, float-operated self-bleeding valve that continuously removes unwanted air from radiators, boilers and closed-loop central heating systems. Entrained air is a common cause of noisy pipework, radiator cold spots, corrosion, pump cavitation and sluggish circulation. By automatically venting air as it accumulates, this automatic air eliminator helps your system run quieter, improves heat transfer and reduces the need for routine manual radiator bleeding. Engineered with a 15 mm compression connection, this model is a fast, secure fit to standard 15 mm copper or multilayer barrier pipework, making it a favourite for swaps and upgrades across the UK. The slimline, low-profile body tucks neatly into tight plant spaces around boilers, hot water cylinders, distribution manifolds and at the tops of radiator risers—where air naturally collects. For optimal performance, install the vent upright/vertical at strategic high points (e.g., boiler flow/return headers, risers, near towel rails or air separators). At its core is a dependable float mechanism: when air reaches the chamber the float drops to open the vent; when water rises, the float closes to reseal, delivering automatic, low-maintenance air release. The brass construction is robust for typical domestic and light commercial hydronic applications and is compatible with commonly used corrosion inhibitors and glycol antifreeze blends in sealed systems. Whether you’re replacing a manual radiator bleed valve, upgrading an older boiler air vent, or standardising components across maintenance contracts, the PlumbEZ Slimline 15 mm Compression provides a leak-resistant, compact solution that restores quiet circulation, balanced radiators and steady, energy-efficient heating performance.