{"product_id":"megaflo-main-250-litre-indirect-unvented-hot-water-cylinder-7912281","title":"Megaflo Main 250 Litre Indirect Unvented Hot Water Cylinder - 7912281","description":"\u003cp style=\"color: #374151; font-size: 16px; line-height: 1.6; margin: 0 0 10px;\"\u003eThe \u003cstrong\u003eMegaflo Main 250 Litre Indirect Unvented Hot Water Cylinder (7912281)\u003c\/strong\u003e is a UK-manufactured stainless steel cylinder designed to provide reliable \u003cstrong\u003emains-pressure hot water\u003c\/strong\u003e, heated indirectly by a gas, oil or system boiler. With a factory-fitted \u003cstrong\u003e3kW Incoloy 800 immersion heater\u003c\/strong\u003e for backup, 250-litre capacity and a high-performance coil-in-coil heat exchanger, it is designed for larger homes with multiple bathrooms and higher hot water demand.\u003c\/p\u003e\n\u003c!-- more --\u003e\n\u003cp style=\"color: #374151; font-size: 16px; line-height: 1.6; margin: 0 0 10px;\"\u003e\u003cem\u003eMegaflo Main is the new name for the Main unvented cylinder range. This model replaces the Main 250 Litre Indirect Unvented Hot Water Cylinder (5135327).\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"color: #374151; font-size: 16px; line-height: 1.6; margin: 0 0 10px;\"\u003eThe cylinder features \u003cstrong\u003e50mm CFC\/HCFC-free polyurethane foam insulation\u003c\/strong\u003e to help minimise heat loss, while the stainless steel inner vessel provides durable construction. Supplied with an expansion vessel, T\u0026amp;P relief valve, pressure reducing valve, 2-port motorised valve and factory-fitted controls, it provides a comprehensive solution for domestic unvented hot water installations.\u003c\/p\u003e\n\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px;\"\u003e\n  \u003cspan style=\"background: #e0f2fe; color: #0369a1; padding: 6px 10px; border-radius: 999px; font-size: 13px; font-weight: 600;\"\u003e250L Capacity\u003c\/span\u003e\n  \u003cspan style=\"background: #fdefe0; color: #c2410c; padding: 6px 10px; border-radius: 999px; font-size: 13px; font-weight: 600;\"\u003eIndirect Unvented\u003c\/span\u003e\n  \u003cspan style=\"background: #eef2ff; color: #4338ca; padding: 6px 10px; border-radius: 999px; font-size: 13px; font-weight: 600;\"\u003e18kW Coil\u003c\/span\u003e\n  \u003cspan style=\"background: #f3f4f6; color: #374151; padding: 6px 10px; border-radius: 999px; font-size: 13px; font-weight: 600;\"\u003e25-Year Vessel Warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 24px;\"\u003e\n  \u003cdiv style=\"flex: 1 1 180px; border: 1px solid #cbd5e1; border-left: 4px solid #0284c7; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #0369a1; font-size: 14px;\"\u003eCapacity\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 15px;\"\u003e250 litres\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 180px; border: 1px solid #cbd5e1; border-left: 4px solid #c2410c; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #c2410c; font-size: 14px;\"\u003eCoil Rating\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 15px;\"\u003e18 kW coil-in-coil\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 180px; border: 1px solid #cbd5e1; border-left: 4px solid #4338ca; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #4338ca; font-size: 14px;\"\u003eOperating Pressure\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 15px;\"\u003e3.5 bar\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 180px; border: 1px solid #cbd5e1; border-left: 4px solid #475569; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #475569; font-size: 14px;\"\u003eInsulation\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 15px;\"\u003e50mm polyurethane foam\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #0369a1; margin: 24px 0 12px;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\n\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 24px;\"\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eLarge Homes\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eThe 250-litre capacity is suited to larger domestic properties with higher hot water requirements.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eMultiple Bathrooms\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eDesigned for homes with multiple bathrooms and increased hot water demand across several outlets.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eBoiler-Heated Systems\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eAn indirect cylinder designed to be heated by a gas, oil or system boiler through its primary coil.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px; background: #f4f8fc;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eDomestic Hot Water\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eA mains-pressure unvented hot water solution for domestic applications requiring substantial stored hot water capacity.\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #0369a1; margin: 24px 0 12px;\"\u003eKey specifications\u003c\/h3\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 0 0 24px; font-size: 14px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eProduct Code\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e7912281\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003eIndirect Unvented\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e250 Litres\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eHeight\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e1752 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003eØ 550 mm cylinder \/ 595 mm base\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eWeight Empty\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eCoil Rating\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e18 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eCoil Heat-Up Time\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e40 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eRecovery Time\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e30 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eStanding Heat Loss\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e2.22 kWh\/24h\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eErP Energy Rating\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003eD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eOperating Pressure\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e3.5 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eExpansion Vessel\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e24 litre, supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px; background: #f4f8fc; font-weight: 600;\"\u003eConnections\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e5e7eb; padding: 10px;\"\u003e22mm compression \/ ¾\" BSP\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color: #0369a1; margin: 24px 0 12px;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\n\n\u003cdiv style=\"background: #f4f8fc; border: 1px solid #cbd5e1; border-left: 4px solid #0284c7; padding: 16px; border-radius: 6px; margin: 0 0 24px;\"\u003e\n  \u003cp style=\"color: #374151; font-size: 15px; line-height: 1.6; margin: 0;\"\u003eThe Megaflo Main 250 Litre is an \u003cstrong\u003eindirect unvented hot water cylinder\u003c\/strong\u003e designed for connection to a compatible gas, oil or system boiler. The 18kW stainless steel coil-in-coil heat exchanger provides indirect heating, while the supplied 24-litre expansion vessel and factory-fitted controls support the unvented installation. The cylinder is supplied with a 2-port motorised valve for primary over-temperature protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #0369a1; margin: 24px 0 12px;\"\u003eDesign \u0026amp; performance benefits\u003c\/h3\u003e\n\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 24px;\"\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #0369a1; margin-bottom: 5px;\"\u003eCoil-in-Coil Heat Exchanger\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eThe 22mm stainless steel coil-in-coil heat exchanger has an 18kW rating and is designed for rapid heat recovery.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #0369a1; margin-bottom: 5px;\"\u003eStainless Steel Vessel\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eThe high-grade stainless steel inner vessel is pressure tested to 15 bar and designed for durable hot water storage.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #0369a1; margin-bottom: 5px;\"\u003e50mm Insulation\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eFactory-injected 50mm CFC\/HCFC-free polyurethane foam helps minimise standing heat loss.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #0369a1; margin-bottom: 5px;\"\u003eBackup Immersion\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eA factory-fitted 3kW Incoloy 800 immersion heater provides an electric backup heating option.\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #0369a1; margin: 24px 0 12px;\"\u003eAdditional installation features\u003c\/h3\u003e\n\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 24px;\"\u003e\n  \u003cdiv style=\"flex: 1 1 220px; background: #f4f8fc; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eExpansion Vessel\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eA supplied 24-litre expansion vessel forms part of the unvented hot water installation package.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; background: #f4f8fc; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eFactory-Fitted Controls\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eSupplied with factory-fitted controls, pressure reducing valve, T\u0026amp;P relief valve and 2-port motorised valve.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; background: #f4f8fc; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eApprovals \u0026amp; Compliance\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px; line-height: 1.5;\"\u003eKIWA approved, Building Regulation G3 compliant and CE marked as specified.\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #0369a1; margin: 24px 0 12px;\"\u003eIdeal for\u003c\/h3\u003e\n\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 18px;\"\u003e\n  \u003cdiv style=\"flex: 1 1 220px; background: #f4f8fc; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eLarge Domestic Properties\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px;\"\u003eHomes requiring 250 litres of stored hot water for higher domestic demand.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; background: #f4f8fc; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eMultiple Bathrooms\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px;\"\u003eProperties with multiple bathrooms and several hot water outlets.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; background: #f4f8fc; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eBoiler-Based Heating Systems\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px;\"\u003eSuitable for indirect heating from compatible gas, oil or system boilers.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex: 1 1 220px; background: #f4f8fc; border: 1px solid #e5e7eb; padding: 14px; border-radius: 6px;\"\u003e\n    \u003cstrong style=\"display: block; color: #374151; margin-bottom: 5px;\"\u003eMain Boiler Systems\u003c\/strong\u003e\n    \u003cspan style=\"color: #374151; font-size: 14px;\"\u003ePairs with Main Eco Compact System or Main Eco Elite System boilers for a complete domestic hot water solution.\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"color: #374151; font-size: 16px; line-height: 1.6; margin: 0;\"\u003eThe \u003cstrong\u003eMegaflo Main 250 Litre Indirect Unvented Hot Water Cylinder (7912281)\u003c\/strong\u003e combines 250-litre storage, an 18kW coil-in-coil heat exchanger, 3kW Incoloy 800 backup immersion and 50mm polyurethane insulation. With stainless steel construction, 3.5 bar operating pressure, KIWA approval and a \u003cstrong\u003e25-year stainless steel inner vessel warranty\u003c\/strong\u003e plus one-year parts and labour warranty, it provides a robust solution for larger homes with demanding hot water requirements.\u003c\/p\u003e","brand":"Megaflo","offers":[{"title":"Default Title","offer_id":53685708718416,"sku":"7912281","price":781.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/main-250-litre-direct-unvented-hot-water-cylinder-720636301-3592447.jpg?v=1779438608","url":"https:\/\/getplumb.co.uk\/products\/megaflo-main-250-litre-indirect-unvented-hot-water-cylinder-7912281","provider":"Getplumb","version":"1.0","type":"link"}