The FlexiGas 22mm Double Sleeved Flexible Gas Pipe (DS-22) – 50m Spool is a pre-sleeved, twin-layer CSST gas pipe designed to cover a wide range of UK installation scenarios directly from the spool. It can be routed through solid walls, solid floors, screed, soil, unvented voids and unventilated risers without requiring additional sleeving on site.
Manufactured to BS/EN 15266 and certified under the BSI Kitemark scheme KM 598726, the FlexiGas DS-22 bends easily by hand for long continuous runs. Its pipe-in-pipe construction, reduced number of joints and flame-free installation can help make installation faster than traditional copper or rigid steel pipework.
DN22 / 22mm
50m Spool
BSI Kitemark KM 598726
BS/EN 15266
Max Operating Pressure
0.5 bar
Applications & suitability
Boiler Installations
A 22mm flexible gas pipe solution suited to regular boiler installation work and long continuous runs.
Solid Walls & Floors
The built-in sleeve allows installation through solid walls and solid floors without additional sleeving on site.
Screed, Soil & Voids
Designed for use through screed, soil, unvented voids and unventilated risers within the stated installation requirements.
Multiple Installation Jobs
The 50m spool is suitable for Gas Safe engineers and contractors carrying out regular 22mm gas installation work.
Key specifications
| Manufacturer / MPN |
FlexiGas™ / DS-22-50 |
| Product Type |
Double Sleeved Flexible Gas Pipe |
| Size |
DN22 (22mm) |
| Length |
50 metres – Spool |
| CSST Outer Diameter |
25.6 mm |
| CSST Internal Diameter |
21.4 mm |
| Total Maximum Diameter Including Sleeve |
35 mm |
| Maximum Operating Pressure |
0.5 bar (BS/EN 15266) |
| Tubing Material |
1.4404 / 1.4541 Stainless Steel (BS/EN 10088) |
| Fire Performance |
EN 1775 Annex A & B Passed; Jacket B-s1 d0, UV Resistant |
| Certification |
BSI Kitemark KM 598726, EN 15266 |
| Colour |
Yellow |
| Warranty |
1 Year (subject to manufacturer's T&Cs) |
Installation & compatibility
The FlexiGas DS-22 features a patent-pending pipe-in-pipe construction consisting of a corrugated stainless steel gas pipe with a yellow PE cover, positioned inside a V0 fire-rated corrugated sleeve in a slidable configuration. The built-in sleeve is designed to meet the stated sleeve requirements of BS 6891 and IGEM/UP/2, 3 & 7, allowing the pipe to be used across the specified installation scenarios without additional sleeving.
Design & performance benefits
Fast, Flame-Free Installation
The pipe bends by hand and can form long continuous runs without soldering, sealants or specialist tools.
Pipe-in-Pipe Construction
The slidable pipe-in-pipe design allows the CSST to be inserted and withdrawn within the protective sleeve.
Fewer Joints
Flexible continuous runs can reduce the number of joints and potential leak points compared with traditional rigid pipework.
FGLink™ Compatible
Compatible with the FlexiGas FGLink™ range of 130+ dezincification-resistant brass fittings.
Additional installation features
FG Bond™ Ready
Features an integrated earthing terminal certified to BS 951:2009 for compatibility with the FG Bond™ system.
Easy Identification
The pipe features metre markings and a high-visibility yellow jacket for easier identification and installation.
Silicone Tape Included
Each 50m spool includes one free roll of silicone tape.
Ideal for
The FlexiGas 22mm Double Sleeved Flexible Gas Pipe DS-22 – 50m Spool is ideal for Gas Safe engineers and contractors carrying out regular 22mm boiler and gas installation work. The 50m spool is designed for multiple installation jobs and can help reduce wastage while providing a practical solution for long continuous runs. It pairs with the FlexiGas spool roller, DS end caps and FGLink™ fittings for a complete installation system.
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