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HomeSaver RectangleFlex 304/316-Alloy Stainless

 rectanglleflex21.jpgHere's another  HomeSaver industry innovation - RectangleFlex.  Before RectangleFlex, the whole family of 8" X 12" flues into which 8" stoves were vented could not be relined without downsizing - because you obviously can't get 8" round relining pipe down an 8" X 12" flue.  And downsizing goes against NFPA 211 code.  Then RectangleFlex came to the rescue.

With RectangleFlex, you have a heavy, yet very flexible pipe of 5 /34" x 9 1/2" inside dimensions - 54 1/2 square inches in total area.  Since an 8" round pipe only has a 50 1/4" total area, you can see that RectangleFlex gives no loss in stack volume when attached to an 8" stove.  (For outside dimensions add 1/4")

RectangleFlex is made from 4-ply interlocked certified stainless steel, each .018" thick. 304-alloy RectangleFlex comes with HomeSaver's lifetime warranty for wood burning applications.  316-alloy comes with a lifetime warranty for wood, coal, oil and non-condensing gas applications.  See warranty information on HomeSaver - HOMESAVER WARRANTIES PDF FILES. 

RectangleFlex is UL Listed to the 1777 Standard for zero clearance when installed according to the manufacturer's instructions.  Also listed to ULC S635-00.

Ordering RectangleFlex is easy because there is just one size.  The inside dimensions are 5 3/4" x 9 1/2".  Outside dimensions are 6" x 9 3/4".

RectangleFlex is sold in 5' lengths, 25' coils, and 10' through 50' custom lengths.  Contact us for more information on shipping.  See custom order RectangleFlex by the foot at bottom of this page. 

For fireplace relines, see our Dial-A-Flex sizes by clicking here.


RectangleFlex Pipe


5 ft. length

Item #         Price 

25 ft. length

Ships Freight Line

Item #         Price 


22830      $ 297.00  

22730FL $1312.75  


22690      $ 436.75 

22590FL $2197.75  


Universal Flex Connecting Band (fits any size HomeSaver Flex)

ff con band.jpg

Item #         Price

Add to Cart

21459     $ 48.50 


Top/Bottom Support Brackets

 ff brackets.jpg

 ff brackets2.jpg

ff brackets3.jpg

 Top/Bottom Support Brackets

Bolt our 12-ga. top/bottom brackets to each side of your HomeSaver Flex.

The brackets then rest on the top plate to provide support.  It's a great alternative to the traditional "wrap around" style of top clamp.

 ....Being Installed

Your support brackets come with four 1/4" bolts and nuts.  Drill a 17/64" hole in your flex for each bracket.  Then put the brackets on each of the four sides of your flex and bolt them in place as pictured above.  (Note: We offer a 17/64" Cobalt Drill Bit, handy when drilling stainless.)

 ....Installation Complete

Once you've drilled your flex and bolted on your brackets, your installation is complete.

The photo above illustrates how the four brackets now rest on your top plate, providing support all the way around. Naturally similar support would be provided in using the four brackets with a bottom plate.  Remember these aren't just for RectangleFlex - use them with any shape or size of HomeSaver Flex.  Some find the brackets more convenient than having to order a specific top clamp for each relining job.  And they are economical.

ITEM #          PRICE 


14200      $ 16.00


R-R Adaptor: RectangleFlex to RectangleFlex

rectangleflex rradp.jpgIf you ever need to join two sections of RectangleFlex. This is the adaptor that will do the job.

RectangleFlex is flexible, yet very thick and heavy like other HomeSaver flexible liners.  As a result, in order to join two sections you need this special adaptor to create the necessary "male-end-down" connection.  This R-R adaptor does that, and with new engineering, it fits even better.


Item #         Price

Add to Cart


21468      $ 38.25


21097     $ 50.75 


R-S Adaptor: RectangleFlex to 8" RoundFlex

rectangleflex rs adp.jpgMost of the time when you reline a flue with RectangleFlex, it will be a straight shot all the way down through the smoke chamber and straight into a RectangleFlex tee.

The R-S Adaptor allows you to come down the flue with RectangleFlex and then mate into 8" RoundFlex for the smoke chamber run.  It will mate RectangleFlex to 8" rigid round stainless pipe as well or basically any round pipe on bottom.


Item #         Price

Add to Cart


21476      $ 119.00 


R-O Adaptor: RectangleFlex to Large OvalFlex

rectangleflex ro adp.jpgIn many cases you'll come down the flue with RectangleFlex and need to use large OvalFlex to get through the damper.

This adaptor is what you'll need to mate the RetangleFlex (which has come down the flue) to the large OvalFlex (which you'll then run through the damper area).


Item #         Price

Add to Cart


21474      $ 113.00


S-R Adaptor:  Rigid Stainless - RectangleFlex

rectangleflex sr adp.jpgUse this S-R Adaptor when you've relined a flue with 8" rigid stainless and need to attach it to HomeSaver RectangleFlex for your damper smoke chamber run. 


Use it to join 8" RoundFlex or Pro to RectangleFlex for you damper/smoke chamber run.  In this case, you'll need to add an 8" connector-adaptor to mate the RoundFlex to this Adaptor.


Use it to join 8" Heat-Fab on top to RectangleFlex on bottom.


Item #         Price

Add to Cart


21475      $ 119.25 


RectangleFlex Top Clamp and Storm Collar

rf topclamp collar.jpgWhen you install RectangleFlex this 18-ga. top clamp will be used as part of your top-mounting hardware assembly.  The special storm collar, when used with a rain cop will give your installation the protection it needs from rain.  Both items are installed in the same way as described on previous pages for RoundFlex and OvalFlex.

Note: Top/Bottom Support Brackets can be used instead of the top clamp pictured here. Pictured above, click here to view.


Item #         Price

Add To Cart

Top Clamp

21463      $ 32.25 

Storm Collar

21462      $ 47.75 


RectangleFlex Tee w/Removable Take-Off & Cover

rf t cover.jpgRun RectangleFlex directly into this tee anytime it's called for in your installation.  Notice the slanted sides - this tee has been redesigned and re-engineered to fit RectangleFlex even better.

There are two pieces to the 8" round removable take-off: a "ring" that fits through the take-off hole from the inside, and the take-off, which fastens to the ring on each side by two radiator-hose type clamps.

Tee Cover is sold separately. 


Tee Item #         Price Cover Item #         Price


21470      $ 103.50 

21472      $ 37.75  


21094      $ 205.50 

21095      $ 71.75  


RectangleFlex Top Plate

rf top plate.jpgRectangleFlex 304-alloy top plates are available with hole dimensions of 9" x 13", 13" x 18", or 18" x 18".  The hole has a nice raised lip and is sized just right to fit RectangleFlex.  Other features include rounded corners. Custom order plates up to 33" x 33" available.

Special Order Top/Bottom plates available. Click here for information.


Item #         Price Add To Cart

9" x 13"

21461      $ 31.75 

 13" x 18"

21464      $ 66.00 

18" x 18"

21465      $ 82.50 


RectangleFlex Cast Iron Insert Boot

rf ins boot.jpgThese boots fit over the exhaust vents of most inserts.

  • It has as outside base of 10" wide X 14" long X 3 1/4" high (inside dimensions are 8 7/8" X 13 7/8"). 

Install by drilling and bolting, or taping and screwing, into your insert top. Then seal with Furnace Cement, Flue Goo, or Flat Fiberglass Stove Gasket.  Click on item name to view more information. Secure the Flex into the boot with the removable rod or screws.

Item #         Price

Add to Cart
20200      $ 80.25 


RectangleFlex Rain Cap

rf top hdwr.jpgThis photo shows a RectangleFlex rain cap and all the top-mounting hardware pieces featured on this page assembled on a section of RectangleFlex.  It is shown here as you would assemble in a typical installation.

 Cap Only

Item #         Price

Add to Cart


21460      $ 94.25 


21092      $ 137.75 


RectangleFlex End-Cone

Img1150.jpgUse this 20-ga. milled steel end-cone during RectangleFlex installations.  Your helper can pull RectangleFlex down past bends much more easily with this end-cone in place. Or attach the end-cone to the winch cable and pull the RectangleFlex up the flue using our Super Winch.  When using a winch, always use care that the flex is moving smoothly.


Item #         Price

Add to Cart


21466      $ 116.75 


RectangleFlex Chimney Cleaning Brush

rf brush.jpgHere's a brush made to fit RectangleFlex perfectly.  It is a special version of the standard Rutland Master Sweep Brushes with 3/8" pipe threads.  5 3/4" x 9 1/2"

Item #         Price

Add to Cart

23170      $ 67.25    Discontinued 

Product Note:  FL indicates freight line shipment.

Ordering Note:  Cut-to-length pieces of HomeSaver liner are NON RETURNABLE, so please order carefully.

Ordering Note:  Inside dimensions of pipe are 5 3/4" x 9 1/2".   For outside dimensions add 1/4" to the inside dimensions.  Cross-sectional area is 54.6

Product Note:  Flex pipe compresses during shipping and may need to be stretched out - instructions for stretching are included with all pipe.

Product Note:  All special order HomeSaver Flex pipe must ship via freight line.  Carriers require packaging on all liners.  This cost will be calculated after we have shipping address.


304 RectangleFlex, With Removable Take-Off


Tee Size 

 Tee Height

 Take0ff Length



13 7/8"


316 RectangleFlex, With Removable Take-Off


Tee Size 

 Tee Height

 Take0ff Length



13 7/8"