{"product_id":"868-3-duel-roof-drain","title":"868 3\" DUEL ROOF DRAIN","description":"\u003chr data-start=\"209\" data-end=\"212\"\u003e\n\u003ch2 data-section-id=\"mipyxe\" data-start=\"214\" data-end=\"230\"\u003e🔧 What it is\u003c\/h2\u003e\n\u003cul data-start=\"231\" data-end=\"414\"\u003e\n\u003cli data-section-id=\"45mfpa\" data-start=\"231\" data-end=\"266\"\u003eSeries: \u003cstrong data-start=\"241\" data-end=\"266\"\u003e868 roof drain system\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"zu3tdv\" data-start=\"267\" data-end=\"299\"\u003eSize: \u003cstrong data-start=\"275\" data-end=\"299\"\u003e3\" outlet connection\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1fn8elf\" data-start=\"300\" data-end=\"358\"\u003eType: \u003cstrong data-start=\"308\" data-end=\"358\"\u003eDual \/ combination roof drain + overflow drain\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1izy37t\" data-start=\"359\" data-end=\"414\"\u003eApplication: \u003cstrong data-start=\"374\" data-end=\"414\"\u003eflat commercial roof drainage system\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"416\" data-end=\"461\"\u003eIn most catalogs, this refers to a unit like:\u003c\/p\u003e\n\u003cul data-start=\"462\" data-end=\"552\"\u003e\n\u003cli data-section-id=\"6yzvdt\" data-start=\"462\" data-end=\"500\"\u003ePrimary roof drain (normal drainage)\u003c\/li\u003e\n\u003cli data-section-id=\"132zhle\" data-start=\"501\" data-end=\"552\"\u003eSecondary overflow drain (emergency water relief)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"554\" data-end=\"557\"\u003e\n\u003ch2 data-section-id=\"mzz3kp\" data-start=\"559\" data-end=\"577\"\u003e⚙️ What it does\u003c\/h2\u003e\n\u003cul data-start=\"578\" data-end=\"794\"\u003e\n\u003cli data-section-id=\"12rxbtk\" data-start=\"578\" data-end=\"619\"\u003eCollects rainwater from a roof membrane\u003c\/li\u003e\n\u003cli data-section-id=\"j8x5m9\" data-start=\"620\" data-end=\"660\"\u003eDirects water into a \u003cstrong data-start=\"643\" data-end=\"660\"\u003e3\" drain line\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"2dubfg\" data-start=\"661\" data-end=\"742\"\u003eProvides \u003cstrong data-start=\"672\" data-end=\"695\"\u003eoverflow protection\u003c\/strong\u003e if primary drain clogs or water rises too high\u003c\/li\u003e\n\u003cli data-section-id=\"65gjt6\" data-start=\"743\" data-end=\"794\"\u003ePrevents \u003cstrong data-start=\"754\" data-end=\"794\"\u003eroof ponding and structural overload\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"796\" data-end=\"833\"\u003e\u003cspan class=\"inline-block align-middle\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-mathml\"\u003e\u003cmath xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"\u003e\u003csemantics\u003e\u003cmrow\u003e\u003cmi\u003eQ\u003c\/mi\u003e\u003cmo\u003e=\u003c\/mo\u003e\u003cmi\u003eA\u003c\/mi\u003e\u003cmo\u003e⋅\u003c\/mo\u003e\u003cmi\u003ev\u003c\/mi\u003e\u003c\/mrow\u003e\u003cannotation encoding=\"application\/x-tex\"\u003eQ = A \\cdot v\u003c\/annotation\u003e\u003c\/semantics\u003e\u003c\/math\u003e\u003c\/span\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eQ\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003cspan class=\"mrel\"\u003e=\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eA\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003cspan class=\"mbin\"\u003e⋅\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003ev\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"835\" data-end=\"911\"\u003e(Conceptually, roof drains are sized based on flow area and water velocity.)\u003c\/p\u003e\n\u003chr data-start=\"913\" data-end=\"916\"\u003e\n\u003ch2 data-section-id=\"1a9kqhb\" data-start=\"918\" data-end=\"966\"\u003e🧱 Key features (typical 868 dual roof drain)\u003c\/h2\u003e\n\u003cul data-start=\"967\" data-end=\"1203\"\u003e\n\u003cli data-section-id=\"bdmy8f\" data-start=\"967\" data-end=\"1010\"\u003e\u003cstrong data-start=\"969\" data-end=\"1010\"\u003eCombination primary + overflow system\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"ks072p\" data-start=\"1011\" data-end=\"1064\"\u003e3\" no-hub cast iron or PVC outlet (varies by model)\u003c\/li\u003e\n\u003cli data-section-id=\"yj03g8\" data-start=\"1065\" data-end=\"1113\"\u003eDome strainer to block debris (leaves, gravel)\u003c\/li\u003e\n\u003cli data-section-id=\"16xqkig\" data-start=\"1114\" data-end=\"1157\"\u003eWaterproof membrane clamp \/ flashing ring\u003c\/li\u003e\n\u003cli data-section-id=\"xdpixs\" data-start=\"1158\" data-end=\"1203\"\u003eAdjustable sump receiver (on some versions)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1205\" data-end=\"1208\"\u003e\n\u003ch2 data-section-id=\"rh5jo2\" data-start=\"1210\" data-end=\"1237\"\u003e🏗️ Typical applications\u003c\/h2\u003e\n\u003cul data-start=\"1238\" data-end=\"1387\"\u003e\n\u003cli data-section-id=\"z3dyks\" data-start=\"1238\" data-end=\"1263\"\u003eCommercial flat roofs\u003c\/li\u003e\n\u003cli data-section-id=\"gi6oga\" data-start=\"1264\" data-end=\"1288\"\u003eIndustrial buildings\u003c\/li\u003e\n\u003cli data-section-id=\"1xlhdja\" data-start=\"1289\" data-end=\"1328\"\u003eSchools, warehouses, retail centers\u003c\/li\u003e\n\u003cli data-section-id=\"14a3ztb\" data-start=\"1329\" data-end=\"1387\"\u003eAny roof requiring \u003cstrong data-start=\"1350\" data-end=\"1387\"\u003ecode-mandated overflow protection\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1389\" data-end=\"1392\"\u003e\n\u003ch2 data-section-id=\"14mrwrq\" data-start=\"1394\" data-end=\"1418\"\u003e🧠 Simple explanation\u003c\/h2\u003e\n\u003cp data-start=\"1419\" data-end=\"1592\"\u003eIt’s basically a \u003cstrong data-start=\"1436\" data-end=\"1591\"\u003eroof drain system that handles normal rainwater AND has a backup overflow drain in case the main one gets blocked, both feeding into a 3-inch pipe line\u003c\/strong\u003e.\u003c\/p\u003e","brand":"SIOUX CHIEF","offers":[{"title":"Default Title","offer_id":52410869055777,"sku":"867-DI3","price":121.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/1905\/1041\/files\/shopping_12_617a30c1-a3e9-4be1-befb-e221d8fa6844.webp?v=1778614829","url":"https:\/\/standardvmi.com\/products\/868-3-duel-roof-drain","provider":"Standard Plumbing Supply","version":"1.0","type":"link"}