FlexiGas DS-22 Double Sleeved CSST Gas Pipe – 100m Spool is a Kitemark-certified corrugated stainless steel gas pipe with its protective sleeve built in. Designed for fast, efficient gas installations, the pre-sleeved CSST system can be installed through solid walls, floors, screed, soil and unvented voids without requiring separate sleeving.
The 100-metre continuous spool allows installers to cut the exact length required for each job, helping reduce joints and material waste. FlexiGas DS-22 can be bent by hand and is designed for long, joint-free runs, with installation claimed to be up to 4x faster than copper.
BSI Kitemark KM 598726
100m Continuous Spool
V0 Fire-Rated Sleeve
22mm CSST Gas Pipe
Applications & suitability
Walls & floors
Built-in sleeving allows installation through solid walls and floors without adding separate protective sleeving.
Screed & soil
Suitable for runs through screed and soil where the built-in sleeve requirement is needed.
Unvented voids
Designed for gas pipe routes through unvented voids with the protective sleeve already integrated.
Long gas runs
The 100m spool is suited to high-volume installation work requiring long continuous 22mm gas pipe runs.
Key specifications
| Manufacturer / MPN |
FlexiGas™ / DS-22-100 |
| Size |
DN22 (22mm), double sleeved |
| Length |
100 metre spool |
| Total max diameter incl. sleeve |
35mm |
| Tube OD / ID |
25.6mm / 21.4mm |
| Max operating pressure |
0.5 bar (BS/EN 15266) |
| Material |
Stainless steel 1.4404/1.4541 (BS/EN 10088), PE sleeve |
| Sleeve |
Built-in V0 fire-rated sleeve |
| Certification |
BSI Kitemark KM 598726, EN 15266; EN 1775 Annex A & B fire tested |
| Colour |
Yellow |
| Warranty |
1 year (subject to manufacturer's T&Cs) |
Installation & compatibility
Built-in sleeve for faster installation: The corrugated stainless steel gas tube sits inside a V0 fire-rated outer sleeve designed to meet the UK definition of a sleeve. This means the pipe can be routed through walls, floors, screed, soil and unvented voids without requiring a separate sleeving operation.
Design & performance benefits
100m continuous spool
Cut the required length directly from the spool, helping minimise waste and reduce the number of joints along long runs.
Hand-bendable CSST
The flexible corrugated stainless steel tube can be bent by hand to help route gas pipe around installation requirements.
Marine-grade stainless steel
Manufactured from 1.4404/1.4541 stainless steel to BS/EN 10088 for the gas-carrying tube.
Fast connection system
Compatible with the FlexiGas FGLink range of DR brass self-flaring fittings for metal-to-metal connections.
Additional installation features
BS 6891 & IGEM compliant sleeve
The integrated sleeve is designed around BS 6891 and IGEM/UP/2, 3 & 7 requirements.
Fire-tested construction
The system has been fire tested to EN 1775 Annex A & B, with a V0 fire-rated sleeve.
Free silicone tape included
A free roll of silicone tape is supplied with the 100m spool for installation requirements.
Ideal for
High-volume installers
Ideal for contractors carrying out multiple 22mm gas installations and requiring long continuous runs.
Boiler installations
Suitable for 22mm gas feeds on boiler installations where flexible routing and built-in sleeving are beneficial.
Long pipe runs
The 100m spool provides substantial continuous pipe length for larger installation projects.
Professional gas contractors
A practical choice for professional installers looking for a pre-sleeved 22mm CSST gas pipe system.
The FlexiGas DS-22 100m Double Sleeved CSST Gas Pipe combines a flexible stainless steel gas tube with an integrated V0 fire-rated sleeve, providing a ready-to-install solution for demanding 22mm gas pipe installations. With BSI Kitemark certification, a 100m continuous spool and compatibility with the FlexiGas FGLink fitting range, it is designed for efficient professional installation across a wide range of routing applications.
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