{"product_id":"epdm-internal-drain-outlet-for-flat-roofs","title":"EPDM Internal Drain Outlet for Flat Roofs","description":"\u003ch1\u003eClassicBond Internal Drain Outlet\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eAnti-Back Up EPDM Roof Drain (68mm, 100mm \u0026amp; 110mm)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe ClassicBond Internal Drain Outlet is a high performance anti back-up roof drain designed to connect EPDM rubber roofing systems directly into internal rainwater pipes that pass through the roof deck.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in 68mm, 100mm and 110mm sizes, this drain is used where the roof drains vertically through the deck, forming a watertight outlet at one of the most critical points on any flat roof.\u003c\/p\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative; list-style:none;\"\u003e\n    Why Internal Drains Are a Critical Roof Detail\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eInternal roof drains are one of the highest risk failure points on flat roofs. If water backs up around the outlet, it can:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eTrack underneath the membrane\u003c\/li\u003e\n      \u003cli\u003eSaturate insulation\u003c\/li\u003e\n      \u003cli\u003eCause internal leaks\u003c\/li\u003e\n      \u003cli\u003eLead to long-term roof failure\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eThis is why anti-back-up protection is essential.\u003c\/p\u003e\n    \u003cp\u003eThe ClassicBond Internal Drain is designed specifically to prevent water or vapour travelling back up between the drain and the inside of the pipe, protecting the roof build-up below.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative; list-style:none;\"\u003e\n    Available Sizes (Choose the Correct Option)\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eThis product is available in three sizes to suit standard UK pipework:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003e68mm\u003c\/strong\u003e – Fits standard domestic 68mm rainwater pipes\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e100mm\u003c\/strong\u003e – Fits standard 100mm pipes\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e110mm\u003c\/strong\u003e – Fits standard 110mm soil or drainage pipes\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eChoosing the correct size ensures a positive pressure fit inside the pipe and proper anti backup performance.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative; list-style:none;\"\u003e\n    What Makes This Drain “Anti-Back Up”\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eClassicBond internal drains feature:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eA smooth square bonding flange for excellent adhesion to EPDM\u003c\/li\u003e\n      \u003cli\u003eA long outlet stem that pushes deep into the pipe\u003c\/li\u003e\n      \u003cli\u003eMultiple outward-facing compression ribs on the stem\u003c\/li\u003e\n      \u003cli\u003eA pressure-fit seal inside the downpipe\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eWhen inserted correctly, the ribs compress against the pipe wall, forming a tight seal that eliminates water backing up into the roof system or insulation.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative; list-style:none;\"\u003e\n    What This Product Includes (Important)\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eThis listing is for the internal drain outlet only, supplied with a leaf guard.\u003c\/p\u003e\n    \u003cp\u003eIt does NOT include:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/products\/classicbond-9-elastoform-epdm-flashing-tape\"\u003eUncured EPDM flashing\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/products\/classicbond-epdm-rubber-roofing-primer\"\u003eEPDM primer\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eThese items are required for correct installation and should be purchased separately.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative; list-style:none;\"\u003e\n    How the Internal Drain Is Installed (High-Level Overview)\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eInstallation method is the same for all sizes:\u003c\/p\u003e\n    \u003col\u003e\n      \u003cli\u003eTrim the flange to leave a 25–35mm bonding area\u003c\/li\u003e\n      \u003cli\u003eMechanically fix the drain securely into the roof deck\u003c\/li\u003e\n      \u003cli\u003eInstall EPDM membrane over the roof (do not apply deck adhesive to the flange)\u003c\/li\u003e\n      \u003cli\u003eCut the membrane using the flange as a guide\u003c\/li\u003e\n      \u003cli\u003eApply EPDM primer to the flange and surrounding membrane\u003c\/li\u003e\n      \u003cli\u003eInstall 9″ uncured EPDM flashing tape with a minimum 60mm overlap\u003c\/li\u003e\n      \u003cli\u003eCut the centre hole\u003c\/li\u003e\n      \u003cli\u003eRoll firmly to seal flashing to membrane and drain\u003c\/li\u003e\n      \u003cli\u003eInsert the leaf guard\u003c\/li\u003e\n    \u003c\/ol\u003e\n    \u003cp\u003eThis creates a watertight seal on the surface and inside the pipe.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative; list-style:none;\"\u003e\n    A Roofer’s Perspective\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eMost internal drain failures aren’t caused by the membrane, or the outlet itself - they’re caused by poor outlet detailing.\u003c\/p\u003e\n    \u003cp\u003eUsing an anti back-up internal drain with uncured EPDM flashing tape and primer correctly removes that risk. Once installed properly, water has only one place to go: down the pipe, not back into the roof.\u003c\/p\u003e\n    \u003cp\u003eIt’s one of the most important details to get right on an EPDM roof.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e","brand":"The Flat Roofing Shop","offers":[{"title":"68mm","offer_id":56496229941579,"sku":"CB-Drain-Int-068","price":23.76,"currency_code":"GBP","in_stock":true},{"title":"100mm","offer_id":56496229974347,"sku":"CB-Drain-Int-100","price":25.44,"currency_code":"GBP","in_stock":true},{"title":"110mm","offer_id":56496230007115,"sku":"CB-Drain-Int-110","price":26.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/4054\/9451\/files\/epdm-internal-drains-all-sizes.jpg?v=1773496675","url":"https:\/\/theflatroofingshop.co.uk\/products\/epdm-internal-drain-outlet-for-flat-roofs","provider":"The Flat Roofing Shop","version":"1.0","type":"link"}