{"product_id":"verplas-150mm-to-125mm-round-duct-reducer","title":"Verplas 150mm to 125mm 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 VKC619\u003c\/strong\u003e is a \u003cstrong\u003e150mm to 125mm white uPVC round duct reducer\u003c\/strong\u003e, providing a \u003cstrong\u003eneat, push-fit transition between 150mm and 125mm round duct runs\u003c\/strong\u003e. It is used wherever a 150mm System 150 duct run needs to step down to a 125mm connection — for example, at a fan unit with a 125mm spigot, or when transitioning from a 150mm main run to a 125mm branch. Overall dimensions are approximately \u003cstrong\u003e155 × 155 × 60 mm\u003c\/strong\u003e.\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;\"\u003e150mm\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;\"\u003e125mm\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;\"\u003e60mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eBody Length\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\u003eDirection:\u003c\/strong\u003e The VKC619 steps \u003cstrong\u003edown from 150mm to 125mm\u003c\/strong\u003e. The 150mm female socket receives the male spigot of System 150 duct pipe or fittings. The 125mm male spigot inserts into System 125 female fittings. For stepping up from 125mm to 150mm, the reducer can be used in reverse.\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;\"\u003e150mm to 125mm Transition\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eProvides the \u003cstrong\u003estandard one-piece reduction\u003c\/strong\u003e between the System 150 (150mm) and System 125 (125mm) Verplas round duct ranges — no improvised adaptor or taped junction required.\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 matching both System 150 and System 125 duct components for a consistent, professional appearance.\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 Both Ends\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe \u003cstrong\u003e150mm female socket accepts System 150 male spigots\u003c\/strong\u003e, and the \u003cstrong\u003e125mm male spigot inserts into System 125 female connectors\u003c\/strong\u003e — both 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;\"\u003eCompact Body\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eAt just 60mm in body length, the reducer is \u003cstrong\u003ecompact and easy to install\u003c\/strong\u003e in ceiling voids and service spaces where transitions are often space-constrained.\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 \u0026amp; System 125 Compatible\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eWorks with both \u003cstrong\u003eVerplas System 150 and System 125 round duct components\u003c\/strong\u003e — connectors, bends, telescopic pipes, fans, and terminals.\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;\"\u003eFan Spigot Adapter\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eCommonly used to adapt a \u003cstrong\u003e150mm duct run to a fan with a 125mm (5\") outlet spigot\u003c\/strong\u003e, or to reduce from a 150mm main run to a 125mm branch connection.\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;\"\u003eVKC619\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;\"\u003e150 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;\"\u003e125 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;\"\u003eBody Length\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e~60 mm\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;\"\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:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eOverall Dimensions\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e155 × 155 × 60 mm (H × W × D)\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\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eVerplas System 150 \/ System 125 interface\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 I use this reducer in reverse to step up from 125mm to 150mm?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eThe reducer can be used in reverse physically, but the push-fit seal geometry is designed for the standard direction. \u003cstrong\u003eFor a step-up transition, it is better to use the equivalent Verplas 125mm-to-150mm reducer\u003c\/strong\u003e if available, or confirm that the reverse-fit creates a satisfactory joint with your supplier.\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;\"\u003eDoes reducing from 150mm to 125mm affect airflow?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eReducing the duct diameter increases air velocity and system resistance. Ensure your \u003cstrong\u003efan can deliver the required flow rate against the increased pressure\u003c\/strong\u003e of the smaller diameter section.\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 reducer do I need to step from 200mm to 150mm?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eUse the \u003cstrong\u003eVerplas VKC436V\u003c\/strong\u003e (200mm to 150mm round reducer) for that transition.\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;\"\u003eIs there a reducer from 150mm to 100mm?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eYes — the \u003cstrong\u003eVerplas VKC437\u003c\/strong\u003e is the 150mm to 100mm round reducer, available separately.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Verplas","offers":[{"title":"Default Title","offer_id":64761271419229,"sku":"RED6-5P","price":13.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/150mmdiameterto125mmdiameter.jpg?v=1779384196","url":"https:\/\/qualityheating.co.uk\/products\/verplas-150mm-to-125mm-round-duct-reducer","provider":"AIZO Quality Heating","version":"1.0","type":"link"}