{"product_id":"zinc-alloy-radiator-bleed-key-5mm-square-socket-2-pack","title":"2-Pack Zinc Alloy Radiator Bleed Key | 5mm Square Socket","description":"\n\u003ch2\u003eKeep Your Radiators Running Efficiently with This 2-Pack Bleed Key Set\u003c\/h2\u003e\n\u003cp\u003eTrapped air in your radiators can cause uneven heating and annoying gurgling noises. This set of \u003cstrong\u003e2 zinc alloy radiator bleed keys\u003c\/strong\u003e gives you the right tool to quickly release trapped air from virtually any standard heating system — restoring full heating performance in minutes. Compact, durable, and easy to use, these keys are an essential addition to any home toolkit.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal 5mm Square Socket:\u003c\/strong\u003e Compatible with the vast majority of standard radiator bleed valves, making this key suitable for most home heating systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Zinc Alloy Construction:\u003c\/strong\u003e Made from robust zinc alloy with an anodised finish for long-lasting resistance to wear and corrosion — a reliable companion in your toolbox for years to come.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Versatile:\u003c\/strong\u003e The small, handy size lets you access bleed valves even in tight or awkward spaces where larger tools simply won't fit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImproves Heating Efficiency:\u003c\/strong\u003e Regular bleeding using this key helps your radiators heat up evenly and quietly, maintaining peak performance throughout the colder months.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy to Use:\u003c\/strong\u003e Simply place the key onto the valve, turn gently to open, allow air to escape, then close — no special skills required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGreat Value 2-Pack:\u003c\/strong\u003e Two keys included so you always have a spare on hand — keep one near the boiler and one in your toolbox.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Zinc Alloy (anodised finish)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSocket Size:\u003c\/strong\u003e 5mm Square\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSuitable For:\u003c\/strong\u003e Standard metal radiator bleed valves\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 2 × Radiator Bleed Key\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eTurn your heating system on and allow radiators to warm up fully.\u003c\/li\u003e\n  \u003cli\u003eTurn your heating off and let the system cool slightly before bleeding.\u003c\/li\u003e\n  \u003cli\u003ePlace the 5mm square socket of the bleed key onto the radiator bleed valve (usually located at the top corner of the radiator).\u003c\/li\u003e\n  \u003cli\u003eWith a cloth or small container ready to catch drips, slowly turn the key anti-clockwise (approximately half a turn) to release trapped air.\u003c\/li\u003e\n  \u003cli\u003eOnce water begins to flow steadily (no more air hissing), close the valve by turning the key clockwise.\u003c\/li\u003e\n  \u003cli\u003eCheck your boiler pressure and repressurise if needed.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Safety Note:\u003c\/strong\u003e Always exercise caution when bleeding radiators — water inside the system may be hot. Keep the key away from children, and store spares safely as the compact size makes them easy to misplace.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-inch-threaded-brass-ball-valve-water-gas-oil-flow-control\"\u003e1-Inch Threaded Brass Ball Valve – Water, Gas \u0026amp; Oil Flow Control\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-1-4-inch-adjustable-washbasin-siphon-trap-leak-proof-silicone-seal\"\u003e1-1\/4\" Adjustable Washbasin Siphon Trap | Leak-Proof Silicone\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHelpful Resource\u003c\/h3\u003e\n\u003cp\u003eFor guidance on home heating system maintenance and safety, visit the U.S. Department of Energy – Home Heating Systems page.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Valve_Corporation\" target=\"_blank\" rel=\"noopener\"\u003eValve Corporation\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What size radiator bleed valve does this key fit?\u003c\/h4\u003e\n\u003cp\u003eA: This radiator bleed key features a 5mm square socket, which is the standard size used on the vast majority of domestic radiator bleed valves. It is suitable for use with most standard metal heating radiators.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Why do I need to bleed my radiators?\u003c\/h4\u003e\n\u003cp\u003eA: Over time, air can become trapped inside your radiator system, causing cold spots, reduced heating efficiency, and gurgling or knocking noises. Bleeding the radiator with this 5mm square socket key releases that trapped air, allowing hot water to circulate fully and your radiators to heat evenly and quietly.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is zinc alloy strong enough for this type of tool?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — zinc alloy is a durable and widely used material for hand tools and hardware. The anodised finish on these bleed keys adds an extra layer of resistance to wear and corrosion, ensuring the keys remain functional and reliable over many uses.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this key in tight spaces?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The compact, slim design of these radiator bleed keys means they can be manoeuvred easily into tight corners and confined spaces where a larger tool would struggle to reach — making them ideal for radiators that are close to walls or in awkward locations.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What size radiator bleed valve does this key fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This radiator bleed key features a 5mm square socket, which is the standard size used on the vast majority of domestic radiator bleed valves. 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The compact, slim design of these radiator bleed keys means they can be manoeuvred easily into tight corners and confined spaces where a larger tool would struggle to reach — making them ideal for radiators that are close to walls or in awkward locations.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Sewing \u0026 Hand Tools\", \"item\": \"https:\/\/oasis-select.com\/collections\/sewing-hand-tools\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"2-Pack Zinc Alloy Radiator Bleed Key | 5mm Square Socket\", \"item\": \"https:\/\/oasis-select.com\/products\/zinc-alloy-radiator-bleed-key-5mm-square-socket-2-pack\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"2pcs 24.5x22.5mm","offer_id":47748142497897,"sku":"14:350853#2pcs 24.5x22.5mm","price":5.75,"currency_code":"USD","in_stock":true},{"title":"2pcs 30x23mm","offer_id":47748142530665,"sku":"14:175#2pcs 30x23mm","price":5.75,"currency_code":"USD","in_stock":true},{"title":"2pcs 30x23mm 1","offer_id":47748142563433,"sku":"14:496#2pcs 30x23mm","price":5.75,"currency_code":"USD","in_stock":true},{"title":"2pcs 25x26mm","offer_id":47748142596201,"sku":"14:366#2pcs 25x26mm","price":5.75,"currency_code":"USD","in_stock":true},{"title":"2pcs 25x26mm 1","offer_id":47748142628969,"sku":"14:193#2pcs 25x26mm","price":5.75,"currency_code":"USD","in_stock":true},{"title":"2pcs 35x30mm","offer_id":47748142661737,"sku":"14:173#2pcs 35x30mm","price":5.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S3d46f45466504404b2edf306e90080bd2.webp?v=1783081678","url":"https:\/\/oasis-select.com\/products\/zinc-alloy-radiator-bleed-key-5mm-square-socket-2-pack","provider":"Oasis Select","version":"1.0","type":"link"}