{"product_id":"holdrite-hfext81-firestop-sleeve-extension-1-in-8-in","title":"Holdrite HFEXT81 Firestop Sleeve Extension 1 in 8 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLDRITE HFEXT81 is a 1-inch high extension designed for use with 8-inch cast-in-place firestop sleeves. It is part of the HydroFlame Pro Series firestop system, which provides protection against the spread of fire, smoke, and gases while also sealing against unwanted water intrusion. This extension is installed by plumbing and mechanical contractors working on multi-story commercial or mixed-use construction where cast-in-place concrete floor penetrations require UL listed firestop assemblies. The HFEXT81 accommodates the telescoping sleeve design of the HydroFlame Pro Series, maintaining system integrity without requiring field-cut modifications.\u003c\/p\u003e\n\u003cp\u003eThis extension is suited for commercial and multi-family residential construction projects where concrete floor-slab penetrations are protected using cast-in-place firestop sleeve assemblies. It integrates with the HydroFlame Pro Series system, which includes optional water dam and water module accessories for applications with added watertight requirements. The HFEXT81 is appropriate for new construction where slab thickness variations or elevation adjustments require sleeve height extensions after forming and pouring.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-inch high extension fits 8-inch cast-in-place HydroFlame Pro Series firestop sleeves\u003c\/li\u003e\n  \u003cli\u003eCompatible with UL listed firestop system providing fire, smoke, and gas spread protection\u003c\/li\u003e\n  \u003cli\u003eSupports water seal capability to resist unwanted water intrusion at floor penetrations\u003c\/li\u003e\n  \u003cli\u003eWorks with patented telescoping sleeve design — no field cutting required\u003c\/li\u003e\n  \u003cli\u003eIntegrates with optional water dam and water module accessories for watertight assemblies\u003c\/li\u003e\n  \u003cli\u003eDesigned for commercial and multi-family concrete floor-slab penetration applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with HOLDRITE HydroFlame Pro Series 8-inch cast-in-place firestop sleeves as part of a UL listed firestop assembly system.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by licensed plumbing or mechanical contractors in compliance with applicable fire and building codes. Ensure the firestop sleeve assembly and all penetrations are installed per the UL listing requirements and the authority having jurisdiction. Do not modify or field-cut the sleeve extension, as alterations may void the UL listing of the firestop assembly. Verify slab elevation and sleeve height requirements prior to concrete placement to confirm correct extension selection.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtension Height\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Sleeve Size\u003c\/strong\u003e: 8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eListing\u003c\/strong\u003e: UL Listed firestop system\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 671119123166\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HOLDRITE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: HFEXT81\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLDRITE","offers":[{"title":"Default Title","offer_id":51383969218866,"sku":"HFEXT81","price":31.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312673144.jpg?v=1782613568","url":"https:\/\/voomisupply.com\/products\/holdrite-hfext81-firestop-sleeve-extension-1-in-8-in","provider":"Voomi Supply","version":"1.0","type":"link"}