Square chimney liner, square chimney liners, square flue liner

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Rock-Flex Stainless Steel Square Chimney Liners 316Ti

How this page works:

Select liner size and length in step 1.

Select kit components for your application in steps 2-5.

Click on Add To Cart below for total cost.

Step 1 - Select Your Square Chimney Liner Size:

316Ti stainless steel square chimney liner. Air and water tight. This flue liner has 7 ply seams, rated number one in the industry for strength. Our square chimney liners are UL listed in the United States UL1777 and ULC365 in Canada. They are made of the very best, hand selected, prime stainless steel material available on today's market. The sizes listed in the drop down box below are square O. D. (Outside Dimensions) and pricing is per foot.

A) Square liner per ft.

B) Enter total length in feet

Step 2 - Select Your Top Plate:

Square Flat Top Plate or Square Terra Cotta Top Plate

Choose our Flat Top Plate if you will be screwing the top plate to the top of your chimney. If you have clay tile at the top of your chimney, you will want to select one of the Terra Cotta Top Plates. Both styles have a square collar design to accept the square chimney liner you selected in Step 1. Both top plates come with the quick connect system, simply tighten down the screw on the outside of the collar of the top plate to secure the liner to the top of the chimney. The flat plate can be trimmed down with a good pair of tin snips. The terra cotta top plate comes with SS screws to secure the top plate via a friction fit. (We will match your square top plate collar to the square liner selected in step 1.)

Flat Top Plate 18"x18" - $99.99

Terra Cotta Top Plate 8"x8" - $129.99
Terra Cotta Top Plate 8"x13" - $134.99
Terra Cotta Top Plate 13"x13" - $139.99
Terra Cotta Top Plate 13"x18" - $144.99
Terra Cotta Top Plate 18"x18" - $149.99

Step 3 - Rain Cap Selection:

Square Rain Cap - $139.99

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. (We will match the rain cap to fit your top plate.)

Yes, I will need a rain cap
No, I will not need a rain cap

Step 4 - Select Your Connector:

Square T and T cap - $214.99

The T has a square shaped body and is attached to the bottom of the liner prior to dropping it down the chimney flue. The horizontal ( snout ) of the T is round and fits into the thimble of your chimney. See the green wood stove picture at left for a visual aid as to how this 2 piece tee is installed, you need to click on the picture. (We will match T to the correct size based on the liner size selected in step 1.)

T Connector and Cap

If choosing this option, please select a diameter for the horizontal T snout:

Square to round vertical liner to insert/appliance connector - $124.99

Mates a drip less connection between square flex liner to the round opening or vertical pipe on your appliance. (We will match square to round connector to the correct size based on the liner size selected in step 1.)

Square to Round Connector

If choosing this option, please select a diameter for the (male) round end:

Square bottom plate for standard fireplace bottom termination - $99.99

Flat bottom plate measures 18" x 18" with a square collar to accept the square chimney liner at the bottom to terminate the liner at the top of an existing fireplace. The 18"x18" flat bottom plate can be trimmed down with a pair of good tin snips. With this square quick connect bottom plate all you will need to do is tighten down the screw on the outside of the collar and your liner is clamped in place at the bottom terminating the old flue of your chimney. (We will match square bottom plate to the square liner selected in step 1.)

Square Bottom Plate

Step 5 - Liner Connector:

Square to Square Liner Connector - $94.99

Female to male dripless seam. Connect flex to flex, rigid to flex, and more. (We will match square to square connector to the square size selected in step one.)

You are likely to need an square to square liner connector if you are purchasing more than 25 feet of liner, as it will be shipped in separate lengths.

Yes, I will need the Square to Square Connector
No, I will not need the Square to Square Connector

Complete installation instructions

"DIY chimney liners installed the easy way. " Most installations will take no more than 2 to 3 hrs. No rivets or screws required. Chimney liner installation instructions

Lifetime Forever transferable chimney liner warranty.

7 days a week toll free phone support.

We offer only the best protection for you and your home. Air and water tight chimney liners with seven ply seams that lock moisture and flue gases in your chimney liner and keeps them from leaking into the home.

Guards Against Corrosion - Certified Rock Flex stainless steel chimney liners protect against hostile acids which deteriorate masonry clay tile chimneys.

What About Creosote? - Our chimney flue liners do not allow creosote to leach though the liner unlike masonry, clay tile flues, or liners not made of prime stainless. Creosote can catch fire, and lead to a house fire. Thanks to Rock Flex, this harmful creosote is minimized and contained.

Protection from Chimney Fires - Rock Flex stainless chimney liners are listed to contain chimney fires within the liner, which protects your home from house fires caused by un maintained flues which can cause severe chimney fires.

Seals Off Carbon Monoxide - When it comes to safety our flexible chimney liners will protect the structure of your home from moisture damage and the very real potential of carbon monoxide poisoning.

UL listed in the USA and CANADA - Our Stainless Steel Chimney Liners and Components are UL tested and listed to USA UL1777 standard, & Canada ULCS635 Underwriter Laboratories. UL is the leader and most recognized in the United States, don't settle for less.

Lifetime / Transferable Warranty - The best warranty anywhere, transferable to new homeowner if you decide to sell. You're going to feel good about this purchase, plus you're adding value to your home with our chimney parts.

316Ti Liners - A unique titanium alloy designed to resist flue acids and the extreme stresses of hot and cold cycles. 316Ti Stainless Steel can be used with fuels such as: wood, coal, pellet, gas and oil. It can withstand multiple heating cycles up to 2100 degrees.

Rock Flex oval chimney liners are .006 thick, which exceeds the industry standard, giving you more for your money.

To learn more about insulation blankets and thermo insulation Click Here

Rockford carries a complete selection of chimney liner supplies. Our Chimney Liner Kits, Chimney Liner Insulation Kits, and all chimney liner kit components are premium stainless-steel, they are 100 percent manufactured in the USA. Buy chimney liners online at Rockford Chimney Supply and you are guaranteed to be getting the best chimney liner supply and lining system available on today's market. Our service, price, & quality is unmatched, anywhere. Canadian customers welcome.