{"product_id":"galvanised-metal-duct-reducers-tin-vent-step-down-adapter","title":"Metal Duct Reducers | Tin Vent Step-Down Adapter","description":"\u003cdiv class=\"n6owBd awi2gc\"\u003e\n\u003cstrong class=\"rQesXe MPyX\"\u003e\u003cspan\u003eMetal Duct Reducers\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e (commonly referred to as tin duct reducers) provide a premium, seamless transition between different sizes of flexible or rigid ventilation pipework. Forged from heavy-duty steel treated with a protective zinc coating, these inline connectors optimize ventilation efficiency, maintain high airflow velocity, and easily withstand the humid environments of hydroponic grow rooms or commercial extraction setups.\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003eCore Product Features\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eCorrosion-Resistant Galvanised Steel:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Built with Sendzimir zinc-coated steel to offer absolute protection against rust, oxidation, and constant humidity exposure.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eConcentric High-Flow Design:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Tapered concentric architecture guarantees smooth, aerodynamic transitions that minimize static back-pressure and airflow turbulence.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eMale Spigot Connectors:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Precision-formed male ends slide effortlessly inside spiral ducting, extraction fans, carbon filters, or flexible hose lines.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eSafety Rolled Edges:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Features safe, rolled outer rims that protect hands during installation while adding critical structural rigidity to prevent crushing.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eHigh Temperature \u0026amp; Pressure Tolerance:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Fully rated to withstand high air volumes and structural heat loads, perfect for inline industrial or residential HVAC systems.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003chr class=\"j3tEEe\"\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e\n\u003cstrong\u003eAvailable Size Variants \u0026amp; Specifications\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eThis range of single-piece structural step-downs is designed to eliminate the need for messy multi-stage adapters. Each variant is engineered with precise male tolerances to slip inside your existing ventilation components.\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"AdPoic\" role=\"heading\"\u003e12\" to 10\" Reducer (315mm to 250mm)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eUnit Net Weight:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 0.72 kg\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eApplication:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Ideal for stepping down commercial-grade main intake lines or high-volume roof ventilation down to standard 10\" filtration systems.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"AdPoic\" role=\"heading\"\u003e12\" to 8\" Reducer (315mm to 200mm)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eUnit Net Weight:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 0.78 kg\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eApplication:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Bridges large-diameter grow room extractors directly to standard 8\" carbon filters or wall outlets with a single fitting.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"AdPoic\" role=\"heading\"\u003e10\" to 8\" Reducer (250mm to 200mm)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eUnit Net Weight:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 0.58 kg\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eApplication:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e A standard hydroponic transition piece used to match a high-power 10\" intake or exhaust fan directly to an 8\" filter array.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"AdPoic\" role=\"heading\"\u003e8\" to 6\" Reducer (200mm to 150mm)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eUnit Net Weight:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 0.45 kg\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eApplication:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Transitions medium-large 8\" grow room extractions down to a standard 6\" air-cooled lighting reflector or flexible duct line.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"AdPoic\" role=\"heading\"\u003e6\" to 5\" Reducer (150mm to 125mm)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eUnit Net Weight:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 0.32 kg\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eApplication:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Adapts standard 6\" fan setups down to 5\" flexible air ducting lines or smaller extraction tents cleanly.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"AdPoic\" role=\"heading\"\u003e6\" to 4\" Reducer (150mm to 100mm)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eUnit Net Weight:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 0.35 kg\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eApplication:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Drops a 6\" main line directly down to a small 4\" utility line, ideal for running targeted air distribution to propagation areas.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"AdPoic\" role=\"heading\"\u003e5\" to 4\" Reducer (125mm to 100mm)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eUnit Net Weight:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 0.24 kg\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong class=\"rQesXe MPyX\"\u003eApplication:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e A lightweight tin fitting perfect for joining 5\" ventilation components or active intakes to a standard 4\" air circuit.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003chr class=\"j3tEEe\"\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003eTechnical Specifications Summary\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"Fv6NCb\"\u003e\n\u003ctable class=\"NRefec\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"cZCYO\"\u003e\n\u003cth class=\"iry6k\" colspan=\"undefined\"\u003eSpecification\u003c!--TgQPHd|||[]--\u003e\n\u003c\/th\u003e\n\u003cth class=\"iry6k\" colspan=\"undefined\"\u003eAll Variant Models\u003c!--TgQPHd|||[]--\u003e\n\u003c\/th\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\"\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003e\n\u003cstrong class=\"rQesXe MPyX\"\u003eMaterial Base\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003eIndustrial-Grade Galvanised Sheet Steel\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\"\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003e\n\u003cstrong class=\"rQesXe MPyX\"\u003eCoating Type\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003eSendzimir Process Zinc Layer (Rust Proof)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\"\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003e\n\u003cstrong class=\"rQesXe MPyX\"\u003eConnection Style\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003eDual-Sided Male Spigot Ends\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\"\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003e\n\u003cstrong class=\"rQesXe MPyX\"\u003eDuct Compliance\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003eFabricated in accordance with DW144 standards\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\"\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003e\n\u003cstrong class=\"rQesXe MPyX\"\u003eMax Temperature\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003eUp to 250°C structural stability\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\"\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003e\n\u003cstrong class=\"rQesXe MPyX\"\u003eAirtight Class\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"cOeeGf\" colspan=\"undefined\"\u003eHigh-efficiency mechanical seal threshold\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!--TgQPHd|||[[1,0,0,2,null,\u0026quot;\u0026quot;]]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003eInstallation \u0026amp; Fitting Advice\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eBecause sheet metal bodies hold their round shape permanently, they will not collapse under heavy tension. To ensure an airtight, rattle-free seal, secure the ducting over the male flanges using silver aluminium tape, heavy-duty jubilee clips, fast clamps, or self-drilling metal rivets.\u003c\/div\u003e","brand":"Steel Roots","offers":[{"title":"5inch-4inch","offer_id":56004167369089,"sku":"125-100-DUCT-REDUCER","price":5.75,"currency_code":"GBP","in_stock":true},{"title":"6inch-4inch","offer_id":56004167401857,"sku":"150-100-DUCT-REDUCER","price":5.75,"currency_code":"GBP","in_stock":true},{"title":"6inch-5inch","offer_id":56004167434625,"sku":"150-125-DUCT-REDUCER","price":6.5,"currency_code":"GBP","in_stock":true},{"title":"8inch-6inch","offer_id":56004167467393,"sku":"200-150-DUCT-REDUCER","price":8.0,"currency_code":"GBP","in_stock":true},{"title":"10inch-8inch","offer_id":56004167500161,"sku":"250-200-DUCT-REDUCER","price":15.3,"currency_code":"GBP","in_stock":true},{"title":"12inch-8inch","offer_id":56004167532929,"sku":"315-200-DUCT-REDUCER","price":15.3,"currency_code":"GBP","in_stock":true},{"title":"12inch-10inch","offer_id":56004167565697,"sku":"315-250-DUCT-REDUCER","price":15.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5370\/1536\/files\/Metal_Duct_Reducers_Tin_Vent_Step-Down_Adapter.jpg?v=1785508459","url":"https:\/\/steelroots.co.uk\/products\/galvanised-metal-duct-reducers-tin-vent-step-down-adapter","provider":"Steel Roots ","version":"1.0","type":"link"}