{"product_id":"rulline-4in-to-3in-black-pvc-reducer-coupler-with-gate-valve-bushing-clamps-rv-plumbing-fittings","title":"RULLINE 4in to 3in Black PVC Reducer Coupler with Gate Valve Bushing \u0026 Clamps | RV Plumbing Fittings","description":"\u003ch2\u003ePremium 4in to 3in Black PVC Reducer for RV Plumbing\u003c\/h2\u003e\u003cp\u003eThe RULLINE 4in to 3in Black PVC reducer coupler combines durable PVC material with a thoughtfully designed, disassembly friendly build. This connector is built to adapt to changing RV plumbing layouts, offering flexibility across trips and campsite setups without committing to a single configuration.\u003c\/p\u003e\u003cp\u003eDesigned for 3 inch piping assemblies, this piece provides a smooth transition between sizes with a compact footprint that fits into tight spaces. The included components help you assemble a reliable connection with confidence, while the black finish adds a clean, low-profile look under vehicle frames.\u003c\/p\u003e\u003ch3\u003eKey benefits at a glance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDurable PVC construction resists wear from travel and moisture, while staying lightweight for easy handling.\u003c\/li\u003e\n\u003cli\u003eDisassemblable and reusable design supports quick maintenance and reconfiguration between trips.\u003c\/li\u003e\n\u003cli\u003ePrecise 3 inch piping compatibility minimizes guesswork and helps maintain steady flow paths.\u003c\/li\u003e\n\u003cli\u003eBlack finish offers a clean aesthetic and potential corrosion resistance for exposed installations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat’s included in the package\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOne gate valve bushing for secure valve engagement\u003c\/li\u003e\n\u003cli\u003eOne 4in to 3in reducer coupler for step-down piping\u003c\/li\u003e\n\u003cli\u003eTwo clamps to secure the assembly firmly\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eImportant safety reminder: Do not use this product with turbocharged or supercharged engines. This precaution supports safer use and more predictable performance in typical RV setups.\u003c\/p\u003e\u003ch3\u003ePractical uses in the field\u003c\/h3\u003e\u003cp\u003eIdeal for RV sewer lines and other 3 inch piping arrangements where a compact, dependable connection matters. The black finish helps it blend with surrounding components, while the modular design supports on-site adjustments without needing extra parts.\u003c\/p\u003e\u003ch3\u003eWhy choose RULLINE\u003c\/h3\u003e\u003cp\u003eRULLINE delivers practical, reliable fittings designed for repeated use. With sturdy PVC, a complete hardware kit, and a compact form, this reducer supports flexible configurations and straightforward installation for road-ready setups.\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: What is included in the RULLINE 4in to 3in Black PVC Reducer Kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Includes one gate valve bushing, one reducer, and two clamps for secure RV connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this kit be used with turbocharged engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A safety note recommends avoiding turbocharged or supercharged engines for safety and performance considerations.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RULLINE","offers":[{"title":"Default Title","offer_id":42466467479637,"sku":"B0CH4K3MPL","price":35.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/rulline-reducer-coupler-4in-to-3in-black.jpg?v=1778048279","url":"https:\/\/plentytorque.co.uk\/products\/rulline-4in-to-3in-black-pvc-reducer-coupler-with-gate-valve-bushing-clamps-rv-plumbing-fittings","provider":"PlentyTorque","version":"1.0","type":"link"}