Home
All products
- Products & Systems
  - Roofing
  - Wall & Floor Ventilation
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >
Roofing
- Products & Systems
  - Dry Fix Roofing
  - Roofspace Ventilation
  - Tile & Slate Ventilators
  - GRP Valley Troughs
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >
Wall & Floor Ventilation
- Products & Systems
  - Non-Combustible Underfloor Vents
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >
Cavity Trays, Closers & Barriers
- Products & Systems
  - Cavity Trays
  - TDI Cavity Closers
  - Thermal Cavity Closers
  - Cavity Barriers
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >
Loft & access
- Products & Systems
  - Tile Access Panels
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >
Rainwater & Drainage
- Products & Systems
  - Drainage Systems
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >
Environmental
- Products & Systems
  - Flood Defence
  - Swift Nesting Brick
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >
Air leakage
- Products & Systems
  - Joist Seals
  - Radiator Pipe Guides & Seals
  - View all
- GRS-DUO-15 - You've asked, we've delivered!
  Designed for 15mm pipework commonly used for central heating systems in modern buildings where Air and Ground Source Heat Pumps are installed.
  Find out more >

Find your nearest stockist

Back to product detail

Find your nearest stockist

Search for "Extension Sleeve" stockists

Register for updates

GRS-DUO-15 - You've asked, we've delivered!

GRS-DUO-15 - You've asked, we've delivered!

GRS-DUO-15 - You've asked, we've delivered!

GRS-DUO-15 - You've asked, we've delivered!

GRS-DUO-15 - You've asked, we've delivered!

GRS-DUO-15 - You've asked, we've delivered!

GRS-DUO-15 - You've asked, we've delivered!

GRS-DUO-15 - You've asked, we've delivered!

Find your nearest stockist

Search for "Extension Sleeve" stockists

Register for updates

PRIVACY POLICY & COOKIE POLICY