{"product_id":"stainless-steel-inside-wall-roof-drain-overflow","title":"Stainless Steel Inside Wall Parapet Roof Drain with Overflow","description":"\u003cblockquote itemprop=\"additionalProperty\" style=\"font-family: Futura, 'Google Sans', Arial, sans-serif;\"\u003e\nNote: Product details and images are currently being updated and may not reflect the latest version. Please contact us at \u003ca href=\"mailto:support@copperlab.com?subject=sku\" style=\"color: #ff9900;\"\u003esupport@copperlab.com\u003c\/a\u003e to confirm specifications before purchasing.\n\u003c\/blockquote\u003e\n\u003cp\u003eThunderbird's 316 stainless steel inside wall parapet roof drain with overflow gives you a primary drain and a backup in one unit. The overflow kicks in when water depth hits a level that says your primary outlet is either clogged or overwhelmed — it routes excess water through a secondary path before ponding becomes a structural load problem. If you've ever gotten a callback because six inches of standing water turned a flat roof into a swimming pool, this is the product that prevents that conversation.\u003c\/p\u003e\n\u003ch2 id=\"features\"\u003eFeatures:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e316 Stainless Steel Construction:\u003c\/b\u003e Marine-grade stainless that handles salt air, chemical exposure, and years of freeze-thaw without pitting or corroding. Won't stain your facade the way copper does over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSandblasted Flashing:\u003c\/b\u003e Roughened surface profile bonds tight to waterproofing membranes. Lap your membrane over the flange and you've got a watertight connection — no sealant dependency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBuilt-in Overflow:\u003c\/b\u003e Secondary drainage outlet mounted higher on the body. Sits dormant during normal rain and activates automatically when water reaches a depth that means the primary can't keep up. No moving parts, nothing to maintain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMultiple Outlet Sizes:\u003c\/b\u003e 2\", 3\", and 4\" to match your leader pipe. Size the primary to your calculated roof load; the overflow handles the margin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in the USA:\u003c\/b\u003e Built and shipped domestically.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlso available in \u003ca href=\"\/products\/tpo-clad-stainless-steel-inside-wall-parapet-roof-drain-with-overflow\" style=\"color: #ff9900;\"\u003eTPO Clad\u003c\/a\u003e and \u003ca href=\"\/products\/pvc-clad-stainless-steel-inside-wall-parapet-roof-drain-with-overflow\" style=\"color: #ff9900;\"\u003ePVC Clad\u003c\/a\u003e for direct heat-welding to single-ply membranes, or \u003ca href=\"\/products\/stainless-steel-inside-wall-roof-drain\" style=\"color: #ff9900;\"\u003ewithout the overflow\u003c\/a\u003e if your primary system has enough redundancy on its own.\u003c\/p\u003e\n\u003ch2 id=\"applications\"\u003eApplications:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eParapet Wall Drainage:\u003c\/b\u003e Flat roofs with parapet walls where you want both primary drainage and overflow protection in a single penetration. The inside-wall outlet keeps plumbing internal — no exposed pipe on the building exterior. Spec this over the standard unit on larger roof areas, low-slope assemblies, or any job where the owner wants belt-and-suspenders peace of mind against heavy storm events.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSame drain as the standard parapet unit, with the overflow built in so you're not cutting a second hole in the wall later when someone decides they want one. Pick your outlet size, match the flange to your membrane system, and you're covered for the worst rain the roof will ever see.\u003c\/p\u003e","brand":"Thunderbird Products, Inc.","offers":[{"title":"2\" No Hub","offer_id":49086599954671,"sku":"SPDNDCB2NH","price":225.0,"currency_code":"USD","in_stock":true},{"title":"3\" No Hub","offer_id":49086599987439,"sku":"SPDNDCB3NH","price":266.0,"currency_code":"USD","in_stock":true},{"title":"4\" No Hub","offer_id":49086600020207,"sku":"SPDNDCB4NH","price":339.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/9129\/4645\/files\/drain_pdndcb1.png?v=1776868902","url":"https:\/\/copperlab.com\/products\/stainless-steel-inside-wall-roof-drain-overflow","provider":"Copperlab","version":"1.0","type":"link"}