DN28 / 28mm 25m Boxed Coil BSI Kitemark KM 598726 Built-In Double Sleeve
Pipe Size
DN28
28mm CSST gas pipe
Length
25 Metres
Boxed continuous coil
Max Operating Pressure
0.5 bar
BS/EN 15266
Outer Diameter
41mm Max.
Including sleeve
Applications & suitability
Larger Domestic Gas Supplies
Designed for Gas Safe engineers installing 28mm gas supplies for larger domestic applications and higher-demand appliances.
Long Boiler Runs
The 25 metre continuous coil is suited to longer gas runs between appliances and gas supply points.
Range Cookers
Suitable for 28mm gas supply installations serving range cookers and other higher-demand appliances.
Walls, Floors & Screed
The integrated sleeve design is intended for routing through solid walls, solid floors, screed, soil and unventilated areas.
Key specifications
| Manufacturer / MPN |
FlexiGas™ / DS-28-25 |
| Size |
DN28 (28mm) |
| Length |
25 metres — boxed coil |
| CSST Outer Diameter |
32mm |
| CSST Internal Diameter |
27mm |
| Total Maximum Diameter |
41mm including sleeve |
| 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
Built-in sleeving: The pipe-in-pipe construction combines an inner corrugated stainless steel gas pipe with a yellow PE cover inside a V0 fire-rated corrugated sleeve in a slidable configuration. This allows the CSST to be inserted and withdrawn while providing an integrated sleeve for installation through solid floors, solid walls, structural elements, earth/soil, screed and unventilated areas.
Design & performance benefits
Pipe-in-Pipe Design
The twin-layer construction combines the CSST gas pipe with an integrated corrugated sleeve for installation without additional sleeving on site.
Hand-Bendable CSST
Flexible corrugated stainless steel tubing can be bent by hand to create continuous gas runs with fewer joints.
Flame-Free Installation
The flexible pipe system requires no soldering, sealants or specialist tools for forming the pipe runs.
Metal-to-Metal Sealing
Compatible with the FlexiGas™ FGLink™ range of 130+ dezincification-resistant brass fittings.
Additional installation features
Built-In Sleeve
The integrated sleeve is designed to meet the definition of a sleeve referenced in BS 6891 and IGEM/UP/2, 3 & 7.
FG Bond™ Ready
Can be paired with the integrated earthing terminal, certified to BS 951:2009, for electrical bonding applications.
Easy On-Site Handling
Metre-marked tubing, high-visibility yellow jacket and one free roll of silicone tape are included with every box.
Ideal for
The FlexiGas 28mm Double Sleeved Flexible Gas Pipe DS-28 is ideal for Gas Safe engineers installing 28mm gas supplies on larger domestic and light commercial projects, including longer boiler runs, range cookers and higher-demand appliances. Its integrated sleeve design makes it suitable for routing through walls, floors, screed, soil and unventilated areas.
Supplied as a 25 metre boxed coil, the FlexiGas DS-28 combines flexible CSST construction, built-in sleeving, BSI Kitemark certification and compatibility with the FlexiGas™ FGLink™ fitting range. Each box also includes one free roll of silicone tape for convenient on-site installation.
