{"product_id":"spruce-flexible-coupling-6-4-white","title":"Spruce Flexible Coupling – 6\" × 4\" (White)","description":"\u003ch2\u003eSpruce Flexible Coupling – 6\" × 4\" White\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible PVC reducing coupling for connecting a 6\" radon fan to 4\" Schedule 40 PVC pipe.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Spruce 6\" × 4\" white flexible coupling provides a \u003cstrong\u003esecure, airtight reducing connection\u003c\/strong\u003e between a 6\"-inlet radon fan and a 4\" Schedule 40 PVC vent stack. Built with high-performance flexible PVC and \u003cstrong\u003estainless steel clamps\u003c\/strong\u003e, it absorbs fan vibration, accommodates minor misalignment, and creates a reliable seal — making it the standard transition fitting for professional radon mitigators stepping a high-capacity fan down to a 4\" riser.\u003c\/p\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eUsed to join a 6\" radon fan outlet or inlet to 4\" PVC pipe in sub-slab depressurization systems. Commonly installed at the fan-to-stack transition for higher-capacity fans — such as the RadonAway RP265, GP501, and XP\/XR series — that use a 6\" collar feeding a 4\" vent run. The flexible body decouples fan vibration from the pipe and simplifies alignment between the fan and stack.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-performance \u003cstrong\u003eflexible PVC\u003c\/strong\u003e construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless steel clamps\u003c\/strong\u003e included for a secure, airtight seal\u003c\/li\u003e\n\u003cli\u003eReduces 6\" to 4\" — the standard high-capacity fan-to-stack transition\u003c\/li\u003e\n\u003cli\u003eWhite finish blends with Schedule 40 PVC pipe\u003c\/li\u003e\n\u003cli\u003eAbsorbs vibration from inline radon fans\u003c\/li\u003e\n\u003cli\u003eAccommodates minor pipe misalignment\u003c\/li\u003e\n\u003cli\u003eUV resistant; conforms to ASTM C1173 and CSA B602\u003c\/li\u003e\n\u003cli\u003eOperating temperature range 30°F to 140°F (-1°C to 60°C)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlexible reducing coupling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlexible PVC with stainless steel clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePipe compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6\" fan collar to 4\" Schedule 40 PVC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eASTM C1173, CSA B602\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30°F – 140°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer SKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e79227\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is a 6\" × 4\" flexible coupling used for in radon mitigation?\u003c\/strong\u003e\u003cbr\u003eIt connects a 6\"-inlet radon fan to a 4\" Schedule 40 PVC vent stack, creating an airtight, vibration-absorbing transition between the fan and the pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich radon fans use a 6\" × 4\" coupling?\u003c\/strong\u003e\u003cbr\u003eHigher-capacity RadonAway fans with a 6\" collar — including the RP265, GP501, and XP\/XR series — commonly step down to a 4\" riser using this coupling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with clamps?\u003c\/strong\u003e\u003cbr\u003eYes. Stainless steel clamps are included for a corrosion-resistant, airtight seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this outdoors?\u003c\/strong\u003e\u003cbr\u003eThe coupling is UV resistant; however, in Canada radon fans and their fittings are installed indoors (attic, basement, or garage). Outdoor fan installation is not permitted under Canadian guidelines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit Schedule 40 PVC?\u003c\/strong\u003e\u003cbr\u003eYes. The 4\" end is sized for standard 4\" Schedule 40 PVC pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the coupling load-bearing?\u003c\/strong\u003e\u003cbr\u003eNo. The pipe should be independently supported; the flexible coupling is a sealing and vibration-isolation joint, not a structural support.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat standards does it meet?\u003c\/strong\u003e\u003cbr\u003eIt conforms to ASTM C1173 and CSA B602.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy use a flexible coupling instead of a rigid reducer?\u003c\/strong\u003e\u003cbr\u003eA flexible coupling absorbs fan vibration, tolerates minor misalignment between the fan and stack, and can be loosened for service — advantages a glued rigid reducer does not offer.\u003c\/p\u003e","brand":"RadonAway","offers":[{"title":"Default Title","offer_id":48645147197695,"sku":"RA-79227","price":23.44,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/6639\/0015\/files\/4x6in-sprucecoupling-a.jpg?v=1780943111","url":"https:\/\/radondepot.ca\/products\/spruce-flexible-coupling-6-4-white","provider":"Radon Depot","version":"1.0","type":"link"}