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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19
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Description
Long Cuttable wall support (250-430mm) 5" BlackBLACK TWINWALL ADJUSTMENT 250 430mm OFF THE WALL Inner Diameter 130mm, external diameter 190mm. Our superior stainless steel insulated twinwall flue system for use with solid fuel appliances. DWX has the strongest interlocking joint system on the market today, making it popular with top installers who need to rely on a quality system every time. Select your required parts and add to your cart, or alternatively Use our FREE TWINWALL QUOTATION SERVICE!
BLACK TWINWALLADJUSTMENT 250-430mm OFF THE WALL
Inner Diameter 130mm, external diameter 190mm.
Our superior stainless steel insulated twinwall flue system for use with solid fuel appliances. DWX has the strongest interlocking joint system on the market today, making it popular with top installers who need to rely on a quality system every time.
Select your required parts and add to your cart, or alternatively Use our FREE TWINWALL QUOTATION SERVICE! and we will select all of the required parts to suit your system.
Note: A Base support is not usually required with our system as the standard wall supports are strong enough to support the weight of the system (when used at every second Joint)
Note: A locking band is required at each joint in the Twinwall system.
Main Features
• Simple, easy push-fit system
• HETAS Approved
• High mechanical resistance to vertical and horizontal forces
• 60mm clearance to combustibles
• No thermal bridge, insulation continuity throughout the system
• Thermal expansion absorbed in each element
• High working temperature: 600°C under continuous operation
Applications
• Solid fuel appliances, wood and multifuel stoves
• Biomass boilers
• Domestic heating and hot water systems
• Hot air generators
• Bakery ovens
• Ventilation and smoke extraction
• Industrial / commercial heating
Materials
Inner wall: 316L Stainless Steel
Outer wall: 304 Stainless Steel
Insulation: 30mm Rockwool
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.1 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Great ball for heavy chewers
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Great toy for my Doberman. She chews through tennis balls in about 15 minutes but these are very durable. She likes to chase them but also just chew on them.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Durable
Style: Fetch Balls (Pack of 2), Size: 3 inch
Very bouncy. I like the noise it makes when you throw it. Pretty durable. Good size. Dog loves to play with them. Good material. Easy to use.
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Reviewed in the United States on April 5, 2026
★★★★★ 4
My dog loves glowing fetch at night!
Style: Glow Balls (Pack of 3), Size: 2.5 inch
Fantastic. Sturdy. My dog loves them
Glow in the dark is great for fetch at night. I keep a flashlight with me because the glow doesn't last really long. But they charge very quickly and are really bright.
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Indestructible
Style: Fetch Balls (Pack of 2), Size: 3 inch
These balls are indestructible! We have a lab and a lab mix and they CANNOT damage these balls. They love them for fetch and to just chew on them (slightly squishy, but NO damage). Best toys we have bought for them.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Great trial set. Just be careful throwing the orange one!
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Blue isn't that easy to see in the yard
White charges with bright light/UV and is truly a game changer for night-time fetch. Both dogs clearly favor it.
Orange is easy to see in the grass at day
They're 3 different weights as well, so double trial. I prefer medium for my big dogs, though light performs well too
The orange is HEAVY and unyielding. Do NOT throw it with a ball thrower. It could damage your house or knock your dog out. Seems tough though.
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Reviewed in the United States on January 16, 2026