{"product_id":"tuolauthon-silicone-reducer-coupler-4-to-5-straight-4-ply-5mm-wall-with-2-stainless-clamps","title":"TuoLauthon Silicone Reducer Coupler 4\" to 5\" Straight 4‑Ply 5mm Wall with 2 Stainless Clamps","description":"\u003cp\u003e\u003cstrong\u003eTuoLauthon’s 4\" to 5\" straight silicone reducer coupler is a heavy-duty, 4-ply silicone hose that joins 4-inch and 5-inch ducts or pipes reliably while resisting heat, UV and ozone.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis reducer coupler is engineered for mechanics, marine technicians, fabricators and DIY installers who need a short, robust connection between mismatched hose diameters. Constructed from 4-ply silicone with a 5 mm wall thickness, the piece ships with two stainless-steel clamps and fits inner diameters from 102 mm (4\") to 127 mm (5\"). It tolerates wide temperatures and pressures, making it suitable for automotive intake systems, coolant lines, exhaust pre-connections, or industrial ventilation where flexibility and durability matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this reducer handle different temperatures and environments?\u003c\/h3\u003e\n\u003cp\u003eThe TuoLauthon reducer is formulated to remain stable across extreme temperatures and resist environmental degradation. Its silicone composition withstands cold and heat and resists ozone and UV exposure, which reduces cracking and hardening over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorking range: -76°F (-60°C) to +500°F (+260°C)\u003c\/li\u003e\n  \u003cli\u003eUV and ozone resistant for outdoor or marine use\u003c\/li\u003e\n  \u003cli\u003eSuitable for long-term repeated thermal cycles without losing flexibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat size and fit details should I know before buying?\u003c\/h3\u003e\n\u003cp\u003eThe coupler adapts a 4\" inner diameter to a 5\" inner diameter on a short straight sleeve. Measure the outside diameter of your pipes or the inner diameter of hoses to ensure a snug fit; the included clamps tighten for a secure seal.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInner diameters accommodated: 102 mm (4\") and 127 mm (5\")\u003c\/li\u003e\n  \u003cli\u003eLength: 76 mm; thickness: 5 mm for dependable sealing\u003c\/li\u003e\n  \u003cli\u003eIncludes two stainless-steel hose clamps for immediate installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow strong and pressure-rated is this silicone coupler?\u003c\/h3\u003e\n\u003cp\u003eThe 4-ply construction gives solid mechanical strength and pressure resistance for many non-critical fluid and air applications. Rated values provide guidance for safe operating ranges in typical automotive and light-industrial systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorking pressure range: 0.3 MPa (43.5 PSI) to 0.9 MPa (130.5 PSI)\u003c\/li\u003e\n  \u003cli\u003eBursting pressure: up to 2 MPa for short-duration events\u003c\/li\u003e\n  \u003cli\u003eFour reinforced plies reduce the chance of collapse under vacuum or deformation under pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I use this coupler for marine, automotive, or industrial projects?\u003c\/h3\u003e\n\u003cp\u003eYes—this coupler’s materials and construction make it versatile for marine engine routing, automotive intake or coolant adaptations, and many industrial ducts. The stainless clamps and silicone that resists salt air and ozone improve its suitability for outdoor and marine settings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon uses: intake piping, charge-air adaptors, coolant bypasses, vent and duct joins\u003c\/li\u003e\n  \u003cli\u003eMaterial resists salt air corrosion and ozone for marine applications\u003c\/li\u003e\n  \u003cli\u003eShort length works where space is limited or where a compact transition is needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Installers, mechanics, boat owners and fabricators who need a compact, durable transition between 4\" and 5\" hoses or pipes will find this TuoLauthon reducer useful. It’s aimed at projects that demand temperature tolerance, UV\/ozone resistance and a mechanically robust connection—perfect when you need a quick, dependable join with included stainless clamps.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this coupler include clamps?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it ships with two stainless-steel hose clamps for immediate installation and a secure seal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can it handle engine bay temperatures?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it works from -76°F to +500°F (-60°C to +260°C), suitable for many engine bay environments.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TuoLauthon","offers":[{"title":"Default Title","offer_id":55167071650135,"sku":"B0CJFMW2HQ","price":36.21,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/tuolauthon-reducer-front-view.jpg?v=1790376465","url":"https:\/\/britishgarage.co.uk\/products\/tuolauthon-silicone-reducer-coupler-4-to-5-straight-4-ply-5mm-wall-with-2-stainless-clamps","provider":"British Garage","version":"1.0","type":"link"}