SKU: 3471859565

DuraVent FasNSeal 8" 316L Stainless Steel Wide Mouth Boot Tee

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Description

DuraVent FasNSeal 8" 316L Stainless Steel Wide Mouth Boot TeeAll FasNSeal (single wall) vent lengths and components feature patented built in mechanical locking band and triple lipped directional gaskets. All pipes and components are engineered with smooth clean welds located 90 from mechanical locking bands. This construction feature allows for ease of installation. The air space between the inner and outer wall on FasNSeal W2 helps to reduce the clearance to combustibles in addition to creating a heat shield

All FasNSeal® (single-wall) vent lengths and components feature patented built-in mechanical locking band and triple-lipped directional gaskets. All pipes and components are engineered with smooth clean welds located 90° from mechanical locking bands. This construction feature allows for ease of installation. The ½” air space between the inner and outer wall on FasNSeal® W2 helps to reduce the clearance to combustibles in addition to creating a heat shield for additional safety.

All FasNSeal® components which come in contact with exhaust gases and condensates are now silicone free. This important design and manufacturing feature greatly reduces the chances of system breakdown and failure. The main problems with silicone are there are too many adhesion factors which are very difficult to control and the process of binding similar materials with an epoxy, which can weaken the bond over time.

What's Included

  • Wide Mouth Boot Tee

Features

  • Available in 4" - 16" diameter
  • Available in 29-4C and 316L Stainless Steel
  • Use to transition from horizontal to vertical.
  • Provides improved flue gas flow with angled gradual transitions.
  • Can also be used as a manifold connection to gang boilers into a common vent.
  • Use to vent Category II, III, and IV gas burning appliances.

Specifications

Brand DuraVent
Series FasNSeal
Model FSWBT8B
Product Type Tee
Construction 316L .019" Stainless Steel
Size (Diameter) 8"
A 19 3/4"
B 9"
C 8 9/10"

Technical Dimensions

Warranty

DuraVent, Inc. (“DuraVent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten years). Subject to the limitations set forth below, DuraVent warrants that its products will be free from defects in material or manufacturing, if properly installed, maintained, and used.
Click to See Warranty Coverage and Limitations


DuraVent, Inc. (“DuraVent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten years). Subject to the limitations set forth below, DuraVent warrants that its products will be free from defects in material or manufacturing, if properly installed, maintained and used. DuraVent products are fully warranted if installed only by a professional installer. This Warranty is transferable from the original homeowner to the buyer of the home. This warranty does not cover normal wear and tear, smoke damage or damage caused by chimney fires, acts of God, or any product that was: (1) purchased other than from an authorized DuraVent dealer, retailer or distributor; (2) modified or altered; (3) improperly serviced, inspected or cleaned; or (4) subject to negligence or any use not in accordance with the installation instructions included with the product as determined by DuraVent.

 

DuraVent provides the following warranties for its products: One Hundred Percent (100%) MSRP 15 years from the date of purchase, and Fifty Percent (50%) thereafter, except for the following limitations on: all Termination Caps and DuraBlack® are warranted at One Hundred Percent (100%) for five years. All warranty obligations of DuraVent shall be limited to repair or replacement of the defective product pursuant to the terms and conditions applicable to each product line. These remedies shall constitute DuraVent’s sole obligation and sole remedy under this warranty. This warranty provides no cash surrender value. The terms and conditions of this warranty may not be modified, altered or waived by any action, inaction or representation, whether oral or in writing, except upon the express, written authority of an executive officer of DuraVent.

 

Corn, bio-fuels, driftwood or other wood containing salt, preservative-treated lumber, plastic and household trash or garbage, or wood pellets containing such materials must not be burned in the appliance or fireplace. In case of a chimney fire, the chimney must be inspected and approved by a certified Chimney Sweep before reuse. After each annual inspection, maintenance, and cleaning, the certified Chimney Sweep must fill out and date the appropriate section of the warranty card provided with the chimney liner.

 

LIMITATIONS ON INTERNET SALES: Notwithstanding any other terms or conditions of this Limited Lifetime Warranty, DuraVent provides no warranty for the following specific products if such products are not installed by a qualified professional installer: DuraTech®, DuraTech® DTC, DuraTech® Premium, DuraPlus HTC®, DDW®, DuraChimney® II, PelletVent Pro®, DirectVent Pro®, FasNSeal®, FasNSeal® W2, FasNSeal® Flex, and PolyPro®, and DuraVent’s relining products including DuraLiner®, DuraFlex® (SW, Pro, 316, 304), and Ventinox®. For purposes of this warranty, a trained professional installer is defined as one of the following: licensed contractors with prior chimney installation experience, CSIA Certified Chimney Sweeps, NFI Certified Specialists, or WETT Certified Professionals.

 

DuraVent must be notified and given the opportunity to inspect defective product prior to replacement under the terms of this limited lifetime warranty. All warranty claims must be submitted with proof of purchase. Labor and installation costs are not covered under this warranty. To obtain warranty service contact: DuraVent Warranty Service, 877 Cotting Ct., Vacaville CA 95688, or call 800-835-4429.

 

WHERE LAWFUL, DURAVENT DISCLAIMS ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL DURAVENT BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR SPECIAL DAMAGES OR DIRECT OR INDIRECT LOSS OF ANY KIND, INCLUDING BUT NOT LIMITED TO PROPERTY DAMAGE AND PERSONAL INJURY. DURAVENT’S ENTIRE LIABILITY IS LIMITED TO THE PURCHASE PRICE OF THIS PRODUCT. SOME STATES DO NOT ALLOW LIMITATIONS ON IMPLIED WARRANTIES, OR THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS THAT VARY FROM STATE TO STATE.

 

Download DuraVent Limited Lifetime Warranty here.

Documents & Files

Videos

Frequently Asked Questions

What are FasNSeal' Specifications?


Applications

FasNSeal is for use with natural gas or propane Categories II, III and IV appliances or Canada’s Type BH Gas Vent Systems, having a maximum rated operating temperature of 480°F and a maximum positive pressure of 15″ (FasNSeal Flex 6″) water column. FasNSeal can be used on a wide range of applications, including: high efficiency gas boilers, furnaces, booster heaters, pool heaters, water heaters, unit heaters, or tankless water heaters.

 

Materials and Construction

3″–7″: 29-4C or 316L stainless steel .016″
8″–12″: 29-4C or 316L stainless steel .019″
14″–16″: 29-4C or 316L stainless steel .024″

 

Diameters

3″ – 16″.

 

Listings

UL Listed to UL 1738 and ULC S636.

What is FasNSeal' Typical Installation?


Refer to our Typical Venting Installation drawings to select the appropriate component parts for your installation.

More Typical Installations:

1    Rain Cap
2    Storm Collar
3    Variable Pitch Roof Flashing
4    Vent Length
5    Adjustable Vent Length
6    Firestop/Flat Flashing
7    Horizontal Drip Tee
8    Elbow
9    Universal Condensate Drain
10    Appliance Adapter
11    Top Plate*
12    Female Flex Adapter
13    FasNSeal Flex
14    Male Flex Adapter
15    Standard Tee

 

Commercial Applications

Commercial projects may require custom parts and unique system designs. DuraVent offers complete project assistance:

  • Engineering Services: Personalized system design services offer comprehensive CAD submittal drawing and complete bills of materials.
  • Custom Parts: If your project requires innovative solutions, contact DuraVent for custom parts that meet your specific project needs.
  • FasNSeal W2: FasNSeal W2 is the ideal choice for commercial applications where there is a need for low clearances to combustibles.
  • Up to 16” Vent Diameters: Many commercial applications require large diameter systems due to the units size and output. Large diameters are available in single and double wall, featuring FasNSeal’s triple lipped directional gaskets and built-in locking band which provides a safe and convenient installation.
What are the DuraVent product lines?


DuraVent offers the following product lines:

DuraTech 5″-8″: All-fuel, double-wall chimney system. UL 103 HT and ULC S604.

DuraTech 10″-24″: All-fuel, double-wall chimney system. UL 103.

DuraTech Canada is a double-wall, all-fuel chimney system for use with wood stoves, wood fireplaces, and other appliances using wood, oil, gas, or coal.

DuraPlus: Triple-wall all-fuel chimney with two layers of insulation.

DuraPlus HTC: Double-wall all-fuel chimney built to Canadian standards.

DuraChimney II: Double-wall air-cooled chimney for pre-fabricated masonry chimneys.

Combustion Air Systems: DuraVent’s exclusive, patent-pending system is designed to bring in outside combustion air directly to your wood or pellet stoves.

DuraBlack: Single-wall stovepipe.

DVL: Double-wall stovepipe.

DuraLiner: Double-wall factory insulated masonry relining system.

DuraFlex: Flexible stainless steel liners.

DuraFlex Aluminum: Flexible aluminum relining for masonry chimney. UL 1777 and ULC S635.

Ventinox: Flexible stainless steel liner.

CVS: Provides Ortal Branded Fireplace Systems and as a Direct Vent for Pellet Stoves.

PelletVent: Multi-fuel vent.

PelletVent Pro: Vents appliances using oil, wood pellets, corn, and other biofuels.

DirectVent Pro: Unitized, co-axial venting system for direct vent gas or propane stoves, heaters, and fireplaces.

Type B Gas Vent: Vents natural gas, liquid propane category I, and draft-hood equipped appliances

FasNSeal: Single, double-wall, flex, and concentric venting for category II, III, and IV appliances.

FasNSeal 80/90: Combined Category I and IV venting for Gas-Burning Appliances.

PolyPro: Single-wall, flex, and concentric venting made of polypropylene for category II and IV condensing appliances that operate up to 248 degrees.

PolyPro Flex: PolyPro double-wall flex lining system. Environmentally safe venting system for high-efficiency appliances, including water heaters, condensing boilers, and warm air furnaces. ULC S636.

DuraSeal: Single-Wall and Double-Wall Special Gas Vent Boiler Adapters.

DuraStack: A modular double-wall, positive pressure chimney for use with boiler breeching and stack, engine exhaust, and grease duct (DIS only)

DuraStack Pro: Models DIS and DAS. Modular Double-Wall Positive Pressure Chimney for Boiler Breeching, Stack, and Engine Exhaust.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 3471859565

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4.5 ★★★★★
Based on 24 reviews
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Product Reviews
K
Verified Purchase
Kindle Customer
Pawtucket, US
★★★★★ 5
Beautiful!
Format: Kindle
I heard about this book in a conversation at a craft party and ordered it the same night. I was not disappointed. I fell in love with Marcellus and Tova and their delightful relationship, and with all the ancillary characters that made this book so special. The ending was so very sweet and satisfying as well. Great 1st book!
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Reviewed in the United States on May 27, 2026
S
Verified Purchase
Stephanie McCall
Lake Worth, US
★★★★★ 4
A Remarkable Book--I Want More Like It!
Format: Kindle
I stumbled on Remarkably Bright Creatures among my recommendations. As often happens, the premise intrigued me enough to read it even though I didn't know the author. Well, if Shelby Van Pelt often writes like this, I definitely want more of her books. The friendship between Tova the aquarium cleaning lady and Marcellus the giant Pacific octopus is a definite selling point in this book. It's a great twist on the "A Kid and Their X" trope (the kind of thing you see in stuff like Where the Red Fern Grows, Old Yeller, Free Willy, and so forth). This one, I am pleased to report, is far less cheesy and saccharine. Tova is a multifaceted character whose life may seem small in her estimation, and probably is if we go by what is a "normal" life in a small seaside town. Yet that life has been stuffed with complex emotions, unanswered questions, and a longing for "more" that I think everybody can relate to. At least, I certainly could. As for Marcellus, he's multifaceted, too. A part of me did stick with his point of view, and story, because it is a story of a "remarkably bright," underestimated creature trapped and controlled in a world he doesn't understand. I have cerebral palsy and was diagnosed as level 1 autistic this spring; I'm still looking back and trying to heal from a lot of the latter's implications. So in a visceral way, yeah. I'm not a captive animal or mistreated, but I understood how Marcellus felt. What I liked even better about his story though, is that Marcellus' story doesn't stop there. Marcellus actually has a life and a history that Shelby Van Pelt, Tova, Cameron, and other characters dig into. He's not just a captive yearning for freedom and mourning lost opportunities, as often happens with similar stories. He makes wry, witty, yet quiet, non-snarky observations about humans. He cares deeply for Tova because she took time to know him as a "person," but also because she's the only human who has ever stopped long enough for Marcellus to know as a real "person." Marcellus gets to be the conduit of real revelation and change for people inside and outside his world. That's amazing, and frankly, it's a lot more than many human characters get. Remarkably Bright Creatures couldn't succeed with just Tova or Marcellus though, or at least not as well as it did, I think. The other characters pop off the page as well. Cameron is my favorite, precisely because I didn't expect to like him at first. By his own admission, he comes off as a burnout and a loser, and I admit, that's how I saw him to begin with. But as with Tova and Marcellus, Cameron is hiding a lot of layers, a lot of depth. He's got a great heart, but he's still a typical, kinda clueless 30-year-old guy (and I'm still a 30-something so I say that tongue in cheek). He's vulnerable but not pitiful; he plays the victim sometimes, but then he gets mad at being called out on that and wants to do better. He struggles and is a burnout, but he's got good, solid friends and some real interests and potential. In other words, I got really into his arc, especially once Tova, Marcellus, and even Ethan got involved. As for Ethan, he's unexpectedly cool, as well. I admit some brownie points with him, as I love all things Scottish or Irish and he is of Scottish descent. But I also didn't expect a shopkeeper in his '70s with a gruff edge to be a Grateful Dead fan or to get along so well with a neat and tidy, tiny Swedish aquarium cleaner, so brownie points on plot and character there. In fact, Ethan's role in the story, in particular, went all kinds of unexpected places, so without spoiling anything, I'll tell you to keep an eye on it. Finally, Shelby wins some extra brownie points for a lot of the "little" things that "pop" out at me when reading a book like this one. For instance, I love cats and love the reluctant yet affectionate relationship Tova develops with a stray cat. I love Marcellus' Collection and the pride and care he takes in it. I love and felt some heartbreak over Tova's reminiscing about the attic playroom that never got to be a playroom. But I think the thing I loved most about Remarkably Bright Creatures is how remarkable Shelby showed readers humans--and creatures--can be, without getting heavy-handed or cheesy. There are some romances here, so to speak, but this is a relationship novel, and those are, have been for the past several years, some of my favorite ones. There is some language here, so caveat emptor if that's not your thing. From a writer's perspective, I also wondered how much some threads or characters were actually needed. For instance, looking back, I understand why Tova had a brother, but I'm unsure how much he furthered the plot. Similarly, I understand the roles of Avery and Marco but again, am unsure how much they furthered the plot. Also, I almost hate to say it, and I could be wrong about this. After all, I know about as much concerning octopi as the average person who watches Jeopardy (which I do). But while Marcellus' plot thread is great, and while I definitely understand suspension of disbelief, I did wonder along with Cameron how much those boundaries were pushed. I mean, I buy Marcellus getting out of his tank, and with the right Collection items, I guess Tova and Cameron could've figured out whatever they needed to know. But...there's a logical shard of me that isn't quite sure she buys how everything lined up, I guess. All that aside though, Remarkably Bright Creatures is still a remarkable book. As often happens, I'm now eager to find more like it. And yes, it does get a hearty recommendation. At the very least, I'll want to take closer looks next time I go to an aquarium.
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Reviewed in the United States on January 22, 2025
S
Verified Purchase
S. Oliver
Lexington, US
★★★★★ 5
Great story and characters
Format: Kindle
I had to see what all the hype was about and after seeing the trailer on Netflix I knew I had to read the book before I watched the movie. I have to say, this was one of the better books I've read so far this year. It's not a fast paced read but it held my interest the entire time. The characters are very well developed and I really grew to like Tova and Cameron, of course Marcellus is the star of the show and is as witty as they come. If you're looking for a good read I highly recommend this one. The octopus is a difficult creature to care for so I sincerely hope the "octopus tank craze" doesn't start over this like the "clownfish tank craze" did when Finding Nemo came out. Leave it to the expert level saltwater hobbyist to care for them or better yet, leave them in the ocean. I have to mention too that this is the author's debut novel and for a debut novel it's very impressive, I'll look for others from her in the future.
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Reviewed in the United States on May 25, 2026
T
Verified Purchase
T. Sparks
Lake Worth, US
★★★★★ 5
A remarkable story
Format: Hardcover
What a wonderful surprise this was! I thought Remarkably Bright Creatures was a story about a woman and an octopus, but it turned out to be so much more than that. This is Shelby Van Pelt’s first book, and I don’t think a debut has affected me like this since I read Hollow Kingdom, another story that unfolds through the eyes of an animal. The story has a bit of magical realism to it, in the sense that parts of it are told from the octopus’s point of view, but otherwise it’s simply a delightful tale about family and connections that had me ugly crying by the end of the book. In the first chapter we meet Marcellus, a giant Pacific octopus on display in the Sowell Bay Aquarium near Puget Sound. Marcellus has been in captivity for 1,299 days, and based on his life expectancy of about four years, he believes he only has a handful of days left to live. His dreary days in a small glass enclosure are broken up by secret nighttime excursions, as Marcellus is extremely smart and has found a way out of his tank. Tova Sullivan is a seventy-year-old woman who has been working nights at the aquarium as a cleaning lady for the past two years. Tova knows how to remove the hundreds of fingerprints on the tank walls and can polish the floors to a brilliant shine. She’s also quite fond of the sea creatures she encounters each night, especially Marcellus, and the two have formed an unusual bond since Tova saved Marcellus one night after he escaped and became entangled in a bunch of electrical cords. Next, we meet Cameron Cassmore, a thirty-year-old man who is drifting through life with no real purpose. Cameron lives in California, and one day his aunt gives him a box of his estranged mother’s things. Inside the box he finds a photo and an old class ring, clues that could lead to the identity of his father, a man he never knew. Cameron hops on a plane to Washington state, convinced the man he thinks is his father—a rich real estate tycoon—will be so distraught over abandoning his son, he’ll shower Cam with money. At least that’s the plan. Finally, Ethan Mack is the owner of Sowell Bay’s Shop-Way, the local grocery store. Ethan has known Tova for years and secretly has a crush on her, but Tova is much too distant to notice his interest. When Cameron shows up at the Shop-Way looking for a job, Ethan directs him to his friend who manages the aquarium, which is how Cameron and Tova meet. Tying all these characters together is Marcellus, a remarkably bright octopus with a penchant for stealing and hoarding the treasures he finds after hours on the aquarium floor, and who just might be able to bring two people together who need each other—but don’t yet realize it. Van Pelt’s chapters alternate among all these characters and introduce a slew of side characters as well, each one vitally important to the story. At first, we don’t realize how each character is connected to the next, but slowly the author reveals her secrets until the stunned reader begins to understand the depth of these connections. Each character is given a detailed backstory that becomes very important to the plot. Tova’s story in particular was heart wrenching, as she has experienced quite a bit of loss in her life and finds herself mostly alone in her twilight years. Luckily she belongs to a group of women who call themselves the Knit-Wits, and the four of them meet weekly to eat, drink, gossip and support each other. Tova came to America from Sweden as a little girl, so the story is filled with details about growing up with her Swedish mother and father. Even the Dala horses her mother collected play a part in the story, and I found these little details added so much richness. At first I couldn’t figure out how Cameron fit it, but once he arrives in Sowell Bay and meets Ethan and Tova, his story takes on new meaning. Cameron meets a woman named Avery who also plays a vital part in filling in some of the missing pieces about Cameron’s father, and I loved the way the author gave even the most insignificant side characters meaning and purpose. Van Pelt infuses her story with so many emotional moments and themes. We see how the Knit-Wits are going through the aging process, as their numbers have dwindled over the last few years. Tova is facing being alone in her old age, with no children or husband to take care of her, and so she makes the rash decision to sell her beloved house and move into a retirement community. I don’t want to give too many details about Tova’s past and her losses, because I think it’s better to discover those revelations for yourself. Let’s just say that I felt Tova’s pain and wanted nothing more than for her to be happy. And Van Pelt includes so many funny moments in her story that kept the tone light, despite some of the more heavy themes. There’s an ongoing bit about Cameron’s lost luggage that was hysterically funny, and Tova inherits a stray cat at one point, which was a delightful side plot. I also loved the story about the t-shirt that Tova uses to clean Ethan’s kitchen—you’ll just have to read the book so you can experience the hilarity too! And of course, I can’t forget the star of the story, Marcellus the octopus. As the days tick by—each of his chapters starts with a marker (“Day 1,299 of my captivity”, etc)---the tension builds as Marcellus gets closer to his impending death (at least that’s what he thinks). Marcellus understands human nature more than most humans, and I loved the way he wisely intuits each character’s needs. Ultimately, this is a story about creatures—both human and animal—saving each other. The way Marcellus’s story plays out was absolutely perfect—heartbreaking and heartwarming at the same time. This is a very special book, and I’m so glad I was able to finally read it. Highly recommended!
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Reviewed in the United States on January 25, 2024
C
Verified Purchase
Carolyn Ellis
Battle Creek, US
★★★★★ 5
It was as good as I'd hoped.
Format: Kindle
Marcellus McSquiddles, the giant Pacific Octopus who has lived at the Sowell Bay Aquarium for going on four years, is often exasperated with the humans who stare at him all day. But there is one human who is different. She speaks to him and more importantly, she keeps his nocturnal escapes from his tank, a secret. Tova is a gentle woman, a widower and still dealing with the loss of her son, more than thirty years ago. When someone new strolls into town, Cameron Cassmore, looking for his dead beat father, he and Tova's lives will become inextricably linked, if they're not already. And Marcellus sees all of this and does his best to assist, where he can, since for the most part, he notices that haumans can be rather dull. But though, sometimes, especially in the case of Tova, there a a few who are remarkably bright. This was a sweet, genuine, heartfelt and beautifully written, fun read. Van Pelt has created a delightfully jaded and long-suffering, sighing character in the form of Marcellus and he and Tova's story is told in such a unique and imaginative way. I'd been meaning to read this for so long and I'm so glad I finally did.
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Reviewed in the United States on May 17, 2026

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