SmartFlex

Our SmartFlex Two Part Tees, crafted from premium 316 or 304 stainless steel are designed for flex liner (316) or rigid pipe and OD liner (304). Featuring an "EZ" band clamp, these tees guarantee...

The SmartFlex Swivel Top Tee is revolutionizing liner installation. Its 360° spinning top liner connection simplifies alignment, saving valuable time. Crafted from durable 24 gauge, 316 stainless...

2-Ply 3003 aluminum liner can be used to vent category 1 gas appliances with A.F.U.E of 83% or lower. In many cases, especially when only water heaters are vented into masonry flues, the gas...

Our best selling SmartStack Chimney Caps are multi-pack, single flue caps built with 100%, 304 stainless steel, and designed to withstand the toughest weather conditions! The multi-pack configuration...

The Double Take-Off Swivel Tee is made with 24 gauge, 316 stainless steel and designed with two take-offs, giving it the capability to spin 360°. This tee features a standard, 2" between...

The EZ Top Plate provides essential support when securing your flue pipe with its reliable EZ band. Designed to fit on the top of a flue tile, this top plate ensures a stable and secure connection...

The EZ Top Plate offers support when securing your flue pipe with its dependable EZ band. Fitting on the top of a flue tile, it ensures a solid and secure chimney connection. Size accordingly for...

National Chimney offers a unique insert adapter that enables both front-to-back and side-to-side adjustments within the firebox. Its two-piece design allows for easy sliding to adjust the...

High Btu Capacity Liner Our SmartFlex Smoothwall 316 Liner not only has a high Btu capacity it is extremely flexible.  The interior of the liner is smooth so it allows for more airflow...

The SmartFlex Insert Boots are 24 gauge, 304 stainless steel and designed to attach rigid pipe or flexible liner with a coupler to the exhaust vents of most inserts. These insert boots come with a...

Stainless steel increaser/reducer adapt pipes of many different sizes. A variety of diameters are available for jobs of all shapes and sizes and are made of 304 stainless steel.

The SmartFlex Stove Adapter is made with 304, stainless steel and allows you to quickly and easily attach a stainless steel chimney liner to the fireplace insert using its "EZ" band clamp. This stove...

These SmartFlex Aluminum Extensions are designed to work with our SmartFlex Aluminum Liner Kits and help finish off appliance runs with their 10' lengths

Guidelines for Sizing SmartFlex Liners & Single AppliancesPlease Note: These are general guidelines for sizing a single appliance liner, and there are many other factors and considerations to...

The PREFERRED CHOICE of Professional Chimney Technicians!SmartFlex Liner can be used to reline existing chimneys or in new construction. It is an all fuel liner and can be used for wood, coal, oil,...

SmartFlex elbows are constructed of high quality stainless steel and provide an unsurpassed fit. They are designed as adjustable or fixed components and are available in 3" - 8" diameters. These...

SmartFlex elbows are constructed of high quality stainless steel and provide an unsurpassed fit. They are designed as adjustable or fixed components and are available in 3" - 8" diameters. These...

SmartFlex Round to Oval Adapters are available in 304 stainless steel. The round end of the adapter is made to accept inside diameter (ID) liners. The oval bottom end is crimped and made to go into...