Adjustable | Twin Wall Flue External System | Single Storey | 4.5m

Create a complete, fully HETAS-compliant external flue system with this pre-configured 4.5-metre kit, ideal for stoves requiring an external twin wall flue solution.

This adjustable system features four bends and a telescopic section to provide excellent flexibility for installation and easy access for ongoing maintenance and cleaning.

Please note: This is an adjustable system, allowing easy access to the stove for cleaning. It’s perfect for installations requiring an offset or clearance around obstacles such as fascia boards, roof overhangs, or gutters.

✅ What’s Included in This Kit:

1. TWPro MB – Flat Adaptor – Ø 125 (Qty: 1)
Connects your stove outlet to the twin wall system.

• Black-coated stainless steel outer (304), 316L inner

• Compressed rock wool insulation

• CE marked & HETAS approved

• 50 mm clearance from combustibles

2. TWPro MB – Pipe 1000 mm – Ø 125 (Qty: 2)
Twin wall insulated flue pipes, each offering approx. 965 mm effective length.

• Injected insulation (25 mm thick, 190 kg/m³ density)

• Fully welded with integral locking band

• EN1856‑1 certified

3. TWPro MB – Rain Cap – Ø 125 (Qty: 1)
Protects the flue from rain ingress while allowing efficient gas exit.

• Cone-top design

• Corrosion-resistant

4. TWPro MB – 45° Bend – Ø 125 (Qty: 3)
Used to navigate obstructions or create offsets.

• Same high-grade construction as flue pipes

• Maintains full certification and insulation integrity

5. TWPro MB – 135° Tee – Ø 125 (Qty: 1)
Ideal for external installations requiring cleaning access at the base.

• Includes locking band

• HETAS and EN1856‑1 certified

6. TWPro MB – Tee Cap – Ø 125 (Qty: 1)
Seals the base of the 135° Tee and includes a threaded drain outlet.

7. TWPro MB – Wall Support 50–80 mm – Ø 125 (Qty: 2)
Wall brackets to support the flue at adjustable distances from the wall.

• Suitable for internal or external mounting

• Matches TWPro black finish

8. TWPro MB – Retro Fit Base Support – Ø 125 (Qty: 1)
Provides foundational support for vertical flue stacks.

• Ideal for freestanding or wall-mounted systems

9. TWPro MB – Pipe 500 mm – Ø 125 (Qty: 1)
Shorter length rigid pipe used for fine height adjustment.

• Same insulation and certification as 1000 mm pipes

10. TWPro MB – Adjustable Pipe 350–500 mm – Ø 125 (Qty: 1)
Telescopic section provides install flexibility.

• Perfect for final height adjustment

• Supplied with insulation wrap and locking band

🔒 Certified and Compliant

• CE marked and HETAS approved

• EN1856‑1 T600 N1 W V2 L50040 G50

• Safe 50mm clearance to combustibles

• 25-Year manufacturer warranty on stainless components (2 years on paint finish)

📦 Usage

This flue system is ideal for:

• External installations on buildings without existing chimneys

• Bungalows, cabins, outbuildings, and extensions

• Solid fuel stoves (wood, multi-fuel) rated for Ø 125 mm twin wall systems

Need help with installation or customisation?
Contact our team for advice – we’re always happy to help.

Call: 0330 4416157 
📩 Email: info@juststoves.co.uk
📩 Email: info@juststoves.co.uk