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

This complete fixed twin wall flue kit is designed for two-storey properties requiring an external flue system. Pre-configured with 4 bends and all essential components, it provides a durable, HETAS-approved solution that meets modern safety and performance standards.

Built from high-grade stainless steel with injected rock wool insulation, this system ensures long-lasting performance, low heat loss, and safe operation with a minimum 50 mm clearance to combustibles.

Note: This is a fixed system using set-length pipes, ideal for structured installations where overall height is known.

What’s Included in the Kit

1. TWPro MB – Flat Adaptor Ø125 (x1)

• Connects stove’s single wall outlet to the twin wall system

• 304 stainless steel outer (black coated) / 316L stainless steel inner

• 25 mm rock wool insulation

• CE marked and HETAS approved

2. TWPro MB – Rain Cap Ø125 (x1)

• Prevents rain ingress while maintaining safe flue discharge

• Cone-top design, stainless steel, corrosion resistant

3. TWPro MB – 45° Bend Ø125 (x3)

• Creates offsets to navigate eaves or obstructions

• Fully insulated and supplied with locking bands

4. TWPro MB – 135° Tee Ø125 (x1)

• Base connection point with cleaning access

• Long-branch design, CE marked and HETAS approved

5. TWPro MB – Tee Cap Ø125 (x1)

• Seals bottom of tee with threaded condensate drain outlet

6. TWPro MB – Pipe 500 mm Ø125 (x2)

• Fixed length for fine-tuning overall height

• Same build and insulation as full-length sections

7. TWPro MB – Pipe 1000 mm Ø125 (x5)

• Full-length insulated twin wall pipes (~965 mm effective)

• 316L stainless inner / 304 stainless outer (black)

• EN1856-1 certified, G50 rated

8. TWPro MB – Wall Support 50–80 mm Ø125 (x2)

• Secures flue to external wall

• Adjustable standoff: 50–80 mm

• Black powder-coated finish

9. TWPro MB – Adjustable Base Support Ø125 (x1)

• Provides secure load-bearing support at ground level

• Height adjustable for uneven surfaces

• Includes locking band for stability

Certification & Compliance

• EN1856-1 T600 N1 W V2 L50040 G50

• CE Marked & HETAS Approved

• 50 mm clearance from combustibles

• 25-year manufacturer warranty (2 years on painted finish)

Ideal For

• Two-storey domestic properties requiring an external flue run

• Installations where fixed-length pipes are preferred

• Wood-burning and multi-fuel stoves with Ø125 mm flue outlet

Benefits for Homeowners

• Complete pre-configured kit – no need to source extra parts

• Professional-grade materials for durability and safety

• Long-term warranty for peace of mind

• Suitable for both wood and multifuel appliances

• HETAS-approved for full compliance