Adjustable | External Twin Wall Flue System | Double Storey | 6.5m

This complete twin wall flue system is designed for 2-storey external installations requiring both height and flexibility. It features 4 bends for versatile routing around obstacles, and includes an adjustable pipe for ease of fitting and future access to the stove for cleaning.

Please note: This is an adjustable system, allowing installers to fine-tune the height on-site and enabling easier stove maintenance over time.

✅ What’s Included in This Kit:

1. TWPro MB – Flat Adaptor – Ø125 (Qty: 1)
Connects the stove's single wall outlet to the twin wall flue.

• 304 outer / 316L stainless inner

• Rock wool insulation (25mm)

• CE marked & HETAS approved

• 50mm clearance to combustibles

2. TWPro MB – Rain Cap – Ø125 (Qty: 1)
Terminal cap designed to allow gas escape and prevent rain ingress.

• Cone-top design

• Corrosion resistant

3. TWPro MB – 45° Bend – Ø125 (Qty: 3)
Allows you to route the flue around obstacles such as eaves, soffits or walls.

• Supplied with locking bands

• Fully insulated and CE certified

4. TWPro MB – 135° Tee – Ø125 (Qty: 1)
Acts as the access and drainage point at the bottom of the system.

• HETAS approved and CE marked

5. TWPro MB – Tee Cap – Ø125 (Qty: 1)
Closes the base of the tee and includes a drainage outlet for condensate.

6. TWPro MB – Adjustable Base Support – Ø125 (Qty: 1)
Supports the flue system from the ground up, with adjustable height for uneven surfaces.

• Fully load rated

• Black-coated to match system

• Supplied with locking band

7. TWPro MB – Pipe 1000 mm – Ø125 (Qty: 5)
Full-length fixed twin wall pipe.

• Effective length ~965mm per piece

• 0.4mm 316L inner, 304 outer

• Injected rock wool insulation (190 kg/m³)

• G50 compliant (EN1856-1)

8. TWPro MB – Pipe 500 mm – Ø125 (Qty: 1)
Half-length pipe for height customisation.

• Same high-grade insulation and construction

9. TWPro MB – Adjustable Pipe 350–500 mm – Ø125 (Qty: 1)
A telescopic pipe that allows height adjustment during installation.

• Supplied with insulation blanket and locking band

• Provides post-install flexibility and maintenance access

10. TWPro MB – Wall Support 50–80 mm – Ø125 (Qty: 2)
Secures the flue system to the external wall with adjustable spacing.

• Adjustable between 50–80 mm

• Powder-coated black

• Load rated for multi-storey use

🔒 Certified & Compliant

• EN1856-1 T600 N1 W V2 L50040 G50

• CE Marked & HETAS Approved

• Safe 50mm clearance to combustibles

• 25-Year Warranty (2 years on painted finish)

📦 Ideal For

• 2-storey homes needing a vertical external flue

• Installations requiring 4 bends and flexibility in final fitting

• Stove installations where future access for sweeping is important

• Wood burning or multi-fuel appliances with a 125mm outlet

Need advice on configuration or installation? We’re here to help.

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