Square Flex Liner Components

Square chimney liner components are custom made to your specifications. Use our Square Flex Liner Components with our Square Flex Liner for a smooth transition from the liner to appliance or to terminate the flex liner. Square flex liners are typically used in a square flue that cannot accommodate the proper sized round flex liner.

Note: Square chimney liner components are custom made to your specifications, and are not refundable. Please contact us if you have any questions.

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Square Flat Top Plate


Square Flat Top Plate

The Flat Plate can be trimmed down with a good pair of tin snips. Top plate measures 18" x 18".See our Top Plate & Chimney Cap Options Product Overview for a detailed explanation of each option. Please select the square collar size in the drop-down window. Read More

Square Terra Cotta Tile Top Plate

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Square Terra Cotta Tile Top Plate

The Square Terra Cotta Top Plate features a square opening for our Square Flex Liners. The Square Terra Cotta Top Plate comes with stainless steel screws to secure the top plate via a friction fit. See our Terra Cotta Top Plate Sizing Chart. Please select the top plate size and... Read More

Square Chimney Cap


Square Chimney Cap

Quick connect square rain cap with screen, wind guard, and quick connect clamp system. The rain cap fits on the outside of the top plate collar. Once in place all you need to do is tighten down the clamp that is already on the rain cap.See our Top Plate &... Read More

Square to Square Flexible Liner Connector


Square to Square Flexible Liner Connector

Square liner to liner connector with female to male dripless seam. Connect flex to flex, rigid to flex, and more. You will need a stainless steel square to square liner connector if you are purchasing more than 25 feet of liner, as it will be shipped in separate lengths (25... Read More

Square to Round Flexible Liner Connector

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Square to Round Flexible Liner Connector

Mates a dripless connection between square flex liner and the round opening or vertical pipe on your appliance. The quick connect clamp on the square end ensures a seal tight connection between the connector and the flex liner. The square to round connector is made from 24 gauge 316L stainless... Read More

Square Pulling Cone


Square Pulling Cone

The pulling cone makes the job of installing a chimney liner easier. Use it to help pull the liner through the chimney. Quick to connect and disconnect from our Square stainless steel chimney liner. A strong eye hook is ready for your rope! Select size and price below. Note: Pulling... Read More

Square Tee and Tee Cap


Square Tee and Tee Cap

The tee has an square shaped body and is attached to the bottom of a chimney pipe / liner. The horizontal (snout) of the tee is round 10" long female and fits into the thimble of your chimney wall. Note: Slight expansion on the end of the tee snout portion... Read More

Square Bottom Plate


Square Bottom Plate

The Square Flat Bottom Plate is 18"x18" with a square collar to accept the square flexible chimney liner at the bottom. Can be trimmed down if needed with a pair of good tin snips.

Square Mesh Bottom Plate


Square Mesh Bottom Plate

For standard fireplace bottom termination. Great for transitioning from a liner to the fireplace smoke chamber. Our mesh bottom plate features a quick connect collar to secure the liner. Moldable mesh allows for a perfect finish with Everguard Refractory Cement . The mesh plate comes standard in 18 in. x... Read More

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Our 316Ti flexible chimney liner and chimney liner components have passed the rigorous testing at the Underwriters Laboratories with best in class status and are UL Listed. So if you are looking for UL listed chimney liner sold directly to homeowners, then look no further than Rockford Chimney

Customer Testimonials

Back in July you gave me excellent advice re. sizing/purchasing a flue liner for the chimney associated with my wood stove. I'd like to thank you once agai... More

—AE Northfield, MN

A few weeks ago I ordered a chimney liner system for my fireplace insert. Your salesman recommended the liner system plus the insulating blanket. I just wa... More

—AH Happy customer

Just got around to installing my new smooth flexible liner and deluxe terra cotta cap (wow). The quality of your product is second to none. Very pleased an... More

—B.B. from Massachusetts

Thanks so much for the great tech service from Dennis, very knowledgable, friendly and proffessional.Your website is the best, beats your competition by fa... More

—Bill in Knoxville

Sue and Dennis, I received the final part of my order yesterday (the chimney cap that actually fits over the chimney chase). It looks wonderfu... More


Hello, I was shopping for an fireplace insert and called RCS to ask why they were so much cheaper than my local guy, the reply was " we sell thousand of th... More

—Chris, PA.