The FlexiGas 15mm Double Sleeved Flexible Gas Pipe (DS-15) – 50m Spool is a pre-sleeved, twin-layer CSST gas pipe designed for fast and versatile gas installations. Its patent-pending pipe-in-pipe construction allows the pipe to pass through solid walls, solid floors, screed, soil, unvented voids and unventilated risers without requiring additional sleeving on site.
DN15 / 15mm
50m Spool
BSI Kitemark Certified
BS/EN 15266
Applications & suitability
Solid Walls & Floors
Suitable for routing through solid walls, solid floors and structural elements.
Screed & Soil
Designed for installations through screed and earth or soil without additional site-applied sleeving.
Unventilated Areas
Suitable for unventilated voids and unventilated risers with its built-in sleeve construction.
Multiple 15mm Installs
The 50m spool allows installers to cut exact lengths for multiple 15mm gas installations.
Key specifications
| Manufacturer / MPN |
FlexiGas™ / DS-15-50 |
| Size |
DN15 (15mm) |
| Length |
50 metres — spool |
| CSST Outer Diameter |
18.1mm |
| CSST Internal Diameter |
14.1mm |
| Total Maximum Diameter incl. Sleeve |
26mm |
| 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-15 features a patent-pending pipe-in-pipe design consisting of an inner corrugated stainless steel gas pipe with a yellow PE cover, positioned inside a V0 fire-rated corrugated sleeve in a slidable configuration. This allows the CSST to be inserted and withdrawn while providing a built-in sleeve for installation scenarios covered by the supplied specifications.
Design & performance benefits
Fast, Flame-Free Installation
Bends by hand for long continuous runs, reducing the need for multiple joints and avoiding soldering, sealants and specialist tools.
Pipe-in-Pipe Construction
The twin-layer design combines corrugated stainless steel CSST with an integrated sleeve in a slidable configuration.
FGLink™ Compatibility
Compatible with the FlexiGas™ FGLink™ range of 130+ dezincification-resistant brass fittings for metal-to-metal sealing.
FG Bond™ Ready
Includes an integrated earthing terminal certified to BS 951:2009 for electrical bonding applications.
Additional installation features
Built-In Sleeve
Built-in sleeve to BS 6891 & IGEM/UP/2, 3 & 7, reducing the need for additional sleeving on site.
Fire Tested
EN 1775 Annex A & B fire tested, with a B-s1 d0 UV-resistant jacket.
Installer-Friendly Spool
Metre-marked tubing and a high-visibility yellow jacket make measuring and cutting lengths easier on site. A free roll of silicone tape is included.
Ideal for
The FlexiGas DS-15 50m spool is ideal for Gas Safe engineers and contractors carrying out multiple 15mm gas installations. The 50-metre spool allows exact lengths to be cut per installation while supporting fast, continuous pipe runs. It can be paired with the FlexiGas spool roller, DS end caps and FGLink™ fittings for a complete installation setup.
At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.
🆓 Free Local Delivery (Orders £100 & above)
We offer FREE delivery on orders £100 or more
for selected local areas.
Eligible Postcodes Include:
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Delivery Time: 2–4 working days
Shipping Cost: £0.00
📦 Standard Shipping (Weight-Based Rates)
For orders that do not qualify for free delivery, standard
shipping rates apply based on total cart weight.
- For cart weight between 0–2 kg, the shipping cost is £4.50 with a delivery time of 2–4 working days.
- For cart weight between 2–24 kg, the shipping cost is £9.99 with a delivery time of 2–4 working days.
- For cart weight between 24 kg and above, the shipping cost is £60 with a delivery time of 2–4 working days.
🧱 Block Salt (Harvey’s) – Unit-Based Shipping
This rate applies only to Harvey’s block salt products.
- £7.99 is charged for every 3 items.
- The charge increases by £7.99 for each additional set of 3 items.
Examples:
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Delivery Time: 2–4 working days
📏 Large / Long Items (Length-Based Shipping)
For oversized items where the product length is 1.5 metres or more:
Conditions:
- Product length ≥ 1.5 m
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Shipping Cost: £18.00 (flat rate)
Delivery Time: 2–4 working days
Collection from Store
Customers can also choose to collect their order from our store in
Reading, UK, at no additional charge. For any questions regarding shipping, please contact our support team at online@getplumb.co.uk.
