{"product_id":"867-2-duel-roof-drain","title":"867 2\" DUEL ROOF DRAIN","description":"\u003cp data-start=\"0\" data-end=\"134\"\u003eon flat commercial roofs.\u003c\/p\u003e\n\u003chr data-start=\"136\" data-end=\"139\"\u003e\n\u003ch2 data-section-id=\"mipyxe\" data-start=\"141\" data-end=\"157\"\u003e🔧 What it is\u003c\/h2\u003e\n\u003cul data-start=\"158\" data-end=\"344\"\u003e\n\u003cli data-section-id=\"7ls8j5\" data-start=\"158\" data-end=\"194\"\u003eSeries: ** 867 roof drain system**\u003c\/li\u003e\n\u003cli data-section-id=\"c86oal\" data-start=\"195\" data-end=\"266\"\u003eType: \u003cstrong data-start=\"203\" data-end=\"266\"\u003eDual (often written “duel”) roof drain = primary + overflow\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"pxj4ki\" data-start=\"267\" data-end=\"299\"\u003eSize: \u003cstrong data-start=\"275\" data-end=\"299\"\u003e2\" outlet connection\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"5thz91\" data-start=\"300\" data-end=\"344\"\u003eApplication: \u003cstrong data-start=\"315\" data-end=\"344\"\u003eflat roof drainage system\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"346\" data-end=\"392\"\u003eFrom catalog listings, this is specifically a:\u003c\/p\u003e\n\u003cul data-start=\"393\" data-end=\"519\"\u003e\n\u003cli data-section-id=\"efr51g\" data-start=\"393\" data-end=\"437\"\u003e\u003cstrong data-start=\"395\" data-end=\"437\"\u003eCombination roof drain + overflow unit\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1bj9615\" data-start=\"438\" data-end=\"519\"\u003eUsed in low-slope or flat roofing systems \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"521\" data-end=\"524\"\u003e\n\u003ch2 data-section-id=\"mzz3kp\" data-start=\"526\" data-end=\"544\"\u003e⚙️ What it does\u003c\/h2\u003e\n\u003cul data-start=\"545\" data-end=\"748\"\u003e\n\u003cli data-section-id=\"17sw0hx\" data-start=\"545\" data-end=\"602\"\u003eCollects rainwater from a roof membrane (primary drain)\u003c\/li\u003e\n\u003cli data-section-id=\"k1ozn\" data-start=\"603\" data-end=\"688\"\u003eProvides a \u003cstrong data-start=\"616\" data-end=\"640\"\u003ebackup overflow path\u003c\/strong\u003e if water rises too high or the main drain clogs\u003c\/li\u003e\n\u003cli data-section-id=\"3jl3l2\" data-start=\"689\" data-end=\"748\"\u003eSends both flows into a \u003cstrong data-start=\"715\" data-end=\"748\"\u003e2-inch drainage piping system\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"750\" data-end=\"787\"\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\u003chr data-start=\"789\" data-end=\"792\"\u003e\n\u003ch2 data-section-id=\"173plne\" data-start=\"794\" data-end=\"812\"\u003e🧱 Key features\u003c\/h2\u003e\n\u003cul data-start=\"813\" data-end=\"1138\"\u003e\n\u003cli data-section-id=\"14rnok7\" data-start=\"813\" data-end=\"870\"\u003e\u003cstrong data-start=\"815\" data-end=\"870\"\u003eTwo-function system (primary + overflow protection)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"19n5prc\" data-start=\"871\" data-end=\"965\"\u003eDome strainer to block debris like leaves and gravel \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"15fwhga\" data-start=\"966\" data-end=\"1028\"\u003eClamping ring system to secure waterproof roofing membrane\u003c\/li\u003e\n\u003cli data-section-id=\"924blt\" data-start=\"1029\" data-end=\"1096\"\u003eDesigned for commercial roof membranes (TPO, EPDM, PVC systems)\u003c\/li\u003e\n\u003cli data-section-id=\"vg43kc\" data-start=\"1097\" data-end=\"1138\"\u003e2\" outlet for gravity drainage piping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1140\" data-end=\"1143\"\u003e\n\u003ch2 data-section-id=\"rh5jo2\" data-start=\"1145\" data-end=\"1172\"\u003e🏗️ Typical applications\u003c\/h2\u003e\n\u003cul data-start=\"1173\" data-end=\"1343\"\u003e\n\u003cli data-section-id=\"z3dyks\" data-start=\"1173\" data-end=\"1198\"\u003eCommercial flat roofs\u003c\/li\u003e\n\u003cli data-section-id=\"1392tma\" data-start=\"1199\" data-end=\"1225\"\u003eSchools and warehouses\u003c\/li\u003e\n\u003cli data-section-id=\"100tikq\" data-start=\"1226\" data-end=\"1246\"\u003eRetail buildings\u003c\/li\u003e\n\u003cli data-section-id=\"1yqm84v\" data-start=\"1247\" data-end=\"1290\"\u003eMechanical rooms with roof penetrations\u003c\/li\u003e\n\u003cli data-section-id=\"1ndlogt\" data-start=\"1291\" data-end=\"1343\"\u003eAny code-required overflow-protected roof system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1345\" data-end=\"1348\"\u003e\n\u003ch2 data-section-id=\"14mrwrq\" data-start=\"1350\" data-end=\"1374\"\u003e🧠 Simple explanation\u003c\/h2\u003e\n\u003cp data-start=\"1375\" data-end=\"1529\"\u003eIt’s basically a \u003cstrong data-start=\"1392\" data-end=\"1528\"\u003e2-inch roof drain that has a built-in emergency overflow drain so water can’t build up on a flat roof if the main drain gets blocked\u003c\/strong\u003e.\u003c\/p\u003e","brand":"SIOUX CHIEF","offers":[{"title":"Default Title","offer_id":52410869023009,"sku":"867-DI2","price":121.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/1905\/1041\/files\/shopping_13_41ac24a8-9f6b-4c1d-92e7-fbe32bdacd1e.webp?v=1778614919","url":"https:\/\/standardvmi.com\/products\/867-2-duel-roof-drain","provider":"Standard Plumbing Supply","version":"1.0","type":"link"}