DuraVent PelletVent Pro Adjustable Pipe Extension | 3" or 4"

DuraVent PelletVent Pro Adjustable Pipe Extension (3" or 4") Precision Length Adjustment for Pellet Stove Venting Systems This adjustable PelletVent Pro pipe extension fine-tunes pellet stove vent length for clean, code-compliant installations where rigid pipe alone won’t fit. Key Features Designed for PelletVent Pro venting systems Adds 3"–46" of adjustable length depending on model Twist-lock, unitized construction 1" clearance to combustibles (USA & Canada) Available in galvalume or black finish Product Features Adjustable Pellet Vent Length for Tight Installations This adjustable pipe extension allows installers to dial in exact vent lengths when rigid pellet vent pipe sections don’t align perfectly—ideal for offsets, wall penetrations, and ceiling transitions. Collapsible Design for Precise Fit Unlike telescoping pipes, this extension slides over an existing rigid section to create adjustment. It does not self-adjust, ensuring a secure, controlled fit when properly installed. PelletVent Pro Twist-Lock Compatibility Built with fully unitized twist-lock connections, this adjustable pellet vent pipe integrates seamlessly with other DuraVent PelletVent Pro components. Code-Compliant Clearance & Installation Flexibility Listed for 1-inch clearance to combustibles and approved for vertical or horizontal pellet stove venting, making it suitable for residential installations in the U.S. and Canada. Durable Double-Wall Construction Features a stainless steel welded-seam inner wall for corrosion resistance and a galvalume welded-seam outer wall for long-term durability and structural integrity. Product Specifications General Specifications Specification Details Product Line PelletVent Pro Manufacturer DuraVent Product Type Adjustable pipe extension Compatible Pipe Sizes 3" or 4" Clearance to Combustibles 1" (USA & Canada) Installation Orientation Vertical or horizontal Adjustment Method Collapses over another existing rigid pipe Inner Wall Material Stainless steel (welded seam) Outer Wall Material Galvalume steel Outer Diameter (OD) Pipe diameter + 5/8" Available Finishes Galvalume or painted black Installed Length Calculation Subtract 1 1/2" from the listed pipe length Adjustment Note Pipe does not self-adjust; it collapses over another rigid section   Adjustable Length Ranges Nominal Pipe Length Adjustable Range 12" 3" – 10" 18" 3" – 16" 48" 4" – 46"   3" PelletVent Pro Adjustable Pipe Size Finish Order # Stock # Adjustable Range 3" Galvalume 3PVP-12A 810001050 3" – 10" 3" Black 3PVP-12AB 810001051 3" – 10" 3" Galvalume 3PVP-18A 810001052 3" – 16" 3" Black 3PVP-18AB 810001053 3" – 16" 3" Galvalume 3PVP-48A 810001054 4" – 46" 3" Black 3PVP-48AB 810001055 4" – 46"   4" PelletVent Pro Adjustable Pipe Size Finish Order # Stock # Adjustable Range 3" Galvalume 3PVP-12A 810001050 3" – 10" 3" Black 3PVP-12AB 810001051 3" – 10" 3" Galvalume 3PVP-18A 810001052 3" – 16" 3" Black 3PVP-18AB 810001053 3" – 16" 3" Galvalume 3PVP-48A 810001054 4" – 46" 3" Black 3PVP-48AB 810001055 4" – 46"