{"product_id":"verplas-200mm-to-150mm-round-duct-reducer","title":"Verplas 200mm to 150mm Round Duct Reducer","description":"\u003cdiv style=\"font-size:16px;font-family:Arial,sans-serif;color:#222;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eVerplas VKC436V\u003c\/strong\u003e is a \u003cstrong\u003e200mm to 150mm white uPVC round duct reducer\u003c\/strong\u003e, providing a \u003cstrong\u003epush-fit transition between 200mm and 150mm round duct runs\u003c\/strong\u003e. It is used wherever a 200mm duct connection — typically from a larger fan unit, cooker hood, or MVHR main spigot — needs to step down to a 150mm System 150 duct run. The one-piece uPVC body provides a clean, consistent transition without the airtightness risks of improvised adaptors or taped junctions.\u003c\/p\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;justify-content:space-around;background:#e6f4f3;border-radius:6px;padding:8px 4px;margin:18px 0;\"\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003e200mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eInlet Diameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003e150mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eOutlet Diameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003ePush-Fit\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eTool-Free\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eWhite uPVC\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eMaterial\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eSystem 150\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eOutput Compatible\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#e6f4f3;border-left:4px solid #005c54;padding:12px 16px;margin:14px 0;border-radius:0 4px 4px 0;font-size:.95em;\"\u003e\n\u003cstrong\u003eTypical Use:\u003c\/strong\u003e The VKC436V is commonly used to connect a \u003cstrong\u003e200mm cooker hood or fan spigot to a 150mm System 150 duct run\u003c\/strong\u003e, or to interface a 200mm main spine duct to a 150mm branch distribution network.\u003c\/div\u003e\n\u003cdiv style=\"background:#fff8e1;border-left:4px solid #c77a00;padding:12px 16px;margin:14px 0;border-radius:0 4px 4px 0;font-size:.95em;\"\u003e\n\u003cstrong\u003eVelocity Increase:\u003c\/strong\u003e Reducing from 200mm to 150mm increases airflow velocity in the smaller duct. Ensure the \u003cstrong\u003efan or MVHR unit can deliver required flow against the increased resistance\u003c\/strong\u003e of the 150mm section, and check that velocity remains within acceptable noise limits.\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin:16px 0;\"\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003e200mm to 150mm Transition\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eProvides the correct \u003cstrong\u003eone-piece manufacturer's reducer\u003c\/strong\u003e between 200mm and 150mm round duct — eliminating the need for improvised taped adaptors at this common interface.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eWhite uPVC Construction\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eMade from \u003cstrong\u003ewhite uPVC\u003c\/strong\u003e consistent with System 150 and wider Verplas round duct components for a clean, professional finish.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003ePush-Fit Connection\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe \u003cstrong\u003e200mm female socket\u003c\/strong\u003e accepts 200mm male spigots; the \u003cstrong\u003e150mm male spigot\u003c\/strong\u003e inserts into System 150 female connectors — both push-fit and tool-free.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eCooker Hood \u0026amp; Fan Interfacing\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eCommonly used to adapt a \u003cstrong\u003e200mm cooker hood or inline fan spigot to the 150mm System 150 duct distribution network\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eSystem 150 Compatible Output\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe 150mm output spigot is directly compatible with \u003cstrong\u003eall System 150 VKC-series fittings\u003c\/strong\u003e, connectors, and duct pipes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eCompact Single-Piece Body\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe single-piece moulded body \u003cstrong\u003ekeeps the transition compact and airtight\u003c\/strong\u003e, avoiding the multiple-component solutions sometimes used for this interface.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;\"\u003eSpecifications\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:.92em;margin:16px 0;\"\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eVerplas SKU\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eVKC436V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eInlet Diameter\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e200 mm (female socket)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eOutlet Diameter\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e150 mm (male spigot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eWhite uPVC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eSystem Interface\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e200mm round duct to Verplas System 150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eCan this reducer be used in reverse (150mm to 200mm)?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003ePhysically the fitting can be reversed, but the socket\/spigot geometry is designed for the standard 200-to-150 direction. A reverse installation may not create a reliable airtight seal — \u003cstrong\u003euse the reducer in its designed orientation\u003c\/strong\u003e.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eWill reducing from 200mm to 150mm cause noise?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eDiameter reduction increases air velocity and turbulence, which can increase duct noise. Keep the \u003cstrong\u003etotal system airflow within the rated limits for the 150mm duct\u003c\/strong\u003e, and consider a silencer (SIL150) downstream if noise is a concern.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eWhat if my fan has a 150mm spigot but I want 200mm duct?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eUse the reducer in reverse (as a 150mm to 200mm step-up) or source a \u003cstrong\u003ededicated 150mm-to-200mm expander fitting\u003c\/strong\u003e — these are available from duct accessory suppliers if required.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eWhat is the difference between VKC436V and VKC437?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eVKC436V reduces \u003cstrong\u003e200mm to 150mm\u003c\/strong\u003e. VKC437 reduces \u003cstrong\u003e150mm to 100mm\u003c\/strong\u003e. Both are Verplas System 150 range reducers for different diameter transitions.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Verplas","offers":[{"title":"Default Title","offer_id":64761303138653,"sku":"RED8-6P","price":15.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/200mmto150mmRoundReducer.jpg?v=1779385228","url":"https:\/\/qualityheating.co.uk\/products\/verplas-200mm-to-150mm-round-duct-reducer","provider":"AIZO Quality Heating","version":"1.0","type":"link"}