{"product_id":"duravent-3-to-4-pelletvent-pro-in-line-increaser","title":"DuraVent 3\" to 4\" PelletVent Pro In-Line Increaser","description":"\u003cp\u003e\u003cstrong\u003eIncrease a 3\" PelletVent Pro run to 4\" partway along the vent.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 3PVP-X4 joins 3\" PelletVent Pro to 4\" PelletVent Pro in line, so you can go up to 4\" after the first fittings. It increases only — it is not a reducer. To increase right at the stove's flue collar instead, use the \u003ca href=\"\/products\/duravent-3-to-4-pelletvent-pro-increaser\"\u003eDuraVent 3\" to 4\" PelletVent Pro increaser\u003c\/a\u003e (appliance adapter style) or the \u003ca href=\"\/products\/duravent-3-pelletvent-pro-increaser-adapter-tee\"\u003e3\" to 4\" increaser adapter tee\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eContinue the run with \u003ca href=\"\/products\/duravent-4-pelletvent-pro-pipe\"\u003eDuraVent 4\" PelletVent Pro pipe\u003c\/a\u003e lengths.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout PelletVent Pro:\u003c\/strong\u003e DuraVent PelletVent Pro is double-wall Type L\/PL pellet vent — a stainless steel inner wall inside a Galvalume outer wall, listed to UL 641 with 1\" clearance to combustibles in the USA and rated for continuous flue temperatures up to 570°F. It is made for stoves and inserts burning wood pellets, corn and other biofuels, or oil. DuraVent parts use a twist-lock joint that connects only to other DuraVent PelletVent Pro components — they will not join another brand's pellet vent, so build the whole run from PelletVent Pro.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e3\" or 4\"?\u003c\/strong\u003e 3\" PelletVent Pro suits typical short pellet stove runs. ComfortBilt notes that 4\" allows longer runs, and recommends 4\" on its stoves when the flue height is over 12 ft, above 5,000 ft elevation, or when the layout goes past the 3\" vent-length limit. Your stove's manual sets the size it requires. Shop all \u003ca href=\"\/collections\/pellet-stoves\"\u003epellet stoves\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"width:100%;max-width:520px\"\u003e\n\u003ctr\u003e\n\u003cth style=\"width:170px\"\u003ePart number\u003c\/th\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/duravent-3-to-4-pelletvent-pro-in-line-increaser\"\u003e3PVP-X4\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width:170px\"\u003eSystem\u003c\/th\u003e\n\u003ctd\u003eDuraVent PelletVent Pro, 3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width:170px\"\u003eVent type\u003c\/th\u003e\n\u003ctd\u003eDouble-wall Type L\/PL pellet vent (UL 641)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width:170px\"\u003eConnects to\u003c\/th\u003e\n\u003ctd\u003eDuraVent PelletVent Pro only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from StoveSource:\u003c\/strong\u003e No Sales Tax · Authorized dealer · 1-888-914-0022\u003c\/p\u003e","brand":"DuraVent","offers":[{"title":"Default Title","offer_id":67773147054332,"sku":"3PVP-X4","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/9944\/0892\/files\/3PVP-X4.jpg?v=1792286047","url":"https:\/\/stovesource.com\/products\/duravent-3-to-4-pelletvent-pro-in-line-increaser","provider":"StoveSource","version":"1.0","type":"link"}