The FlexiGas 22mm Double Sleeved Flexible Gas Pipe (DS-22) – 15m Box is a pre-sleeved, twin-layer CSST gas pipe designed to pass through a wide range of installation scenarios straight out of the box, including solid walls, solid floors, screed, soil and unvented voids. With no additional sleeving required on site, it provides a practical solution for domestic gas installations where efficient routing and installation are important.
Certified under the BSI Kitemark scheme KM 598726 and manufactured to BS/EN 15266, the 22mm FlexiGas DS-22 bends easily by hand for long continuous runs and is designed to install up to 4x faster than copper or rigid steel. The 15-metre boxed coil is particularly suited to individual boiler and appliance installations, with a free roll of silicone tape included in every box.
22mm DN22
15m Boxed Coil
BSI Kitemark Certified
1 Year Warranty
Max Operating Pressure
0.5 bar
Certification
KM 598726 / EN 15266
Applications & suitability
Boiler Installations
Suitable for 22mm gas feeds to boilers and appliances where flexible routing is required.
Walls & Floors
The built-in sleeve allows installation through solid walls, solid floors and structural elements without separate sleeving.
Screed & Soil
Designed for routing through screed and soil as part of the stated installation scenarios.
Unvented Areas
Suitable for unvented voids and unventilated installation areas without requiring additional site-applied sleeving.
Key specifications
| Manufacturer / MPN |
FlexiGas™ / DS-22-15 |
| Size |
DN22 (22mm) |
| Length |
15 metres — boxed coil |
| CSST Outer / Internal Diameter |
25.6mm / 21.4mm |
| Total Max Diameter Including Sleeve |
35mm |
| Max 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 built-in sleeve manufactured to BS 6891 and IGEM/UP/2, 3 & 7, allowing the pipe to be routed through the stated installation scenarios without additional sleeving on site. The inner corrugated stainless steel gas pipe sits within a yellow PE cover and V0 fire-rated corrugated sleeve in a slidable pipe-in-pipe configuration. The small annulus also allows direct clipping.
Design & performance benefits
Patent-Pending Pipe-in-Pipe Design
The corrugated stainless steel gas pipe and protective sleeve use a slidable configuration, allowing the CSST to be inserted and withdrawn.
Fast, Flame-Free Installation
The pipe bends by hand for continuous runs, with no soldering, sealants or specialist tools required.
Reduced Joints
Long continuous runs can reduce the number of joints and potential leak points compared with conventional rigid pipework.
130+ FGLink™ Fittings
Compatible with the FlexiGas FGLink range of 130+ dezincification-resistant brass fittings for secure metal-to-metal connections.
Additional installation features
Built-In Sleeve
Sleeving is integrated into the product and is designed to meet the stated BS 6891 and IGEM/UP requirements.
FG Bond™ Ready
The integrated earthing terminal is certified to BS 951:2009 and supports the FG Bond system.
Ready for On-Site Use
Metre-marked tubing, a high-visibility yellow jacket and one free roll of silicone tape are supplied with every 15m box.
Ideal for
Gas Safe Engineers
Designed for Gas Safe engineers installing 22mm boiler and appliance gas feeds.
Domestic Gas Installations
The compact 15m box is suited to individual domestic installations requiring flexible gas routing.
Walls, Floors & Screed
Suitable for routing through the stated solid wall, floor and screed applications without additional sleeving.
Single-Install Requirements
The 15-metre boxed coil provides a convenient length for individual boiler and appliance feed installations.
The FlexiGas 22mm Double Sleeved Flexible Gas Pipe DS-22 – 15m Box combines a pre-sleeved CSST gas pipe, flexible installation, BSI Kitemark certification and compatibility with 130+ FGLink™ fittings. With its built-in sleeve, V0 fire-rated corrugated sleeve, yellow UV-resistant jacket, integrated earthing terminal and supplied silicone tape, it is designed for efficient 22mm gas pipework installations across the stated domestic applications.
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