For installers
Check sizing, fitting choice, support, bonding, tightness testing and installation guidance before work starts.
The Flexigas range
CSST pipe, gas pipe fittings and accessories.
Flexigas combines yellow-covered 316L stainless CSST pipe with approved brass fittings, copper transition connectors, FG Bond and installation accessories. For fixed UK gas pipework by competent Gas Safe installers, the Flexigas system is BSI Kitemarked to BS EN 15266:2007 and available from DN15 to DN50.
Gas pipe fittings
Choosing Flexigas gas pipe fittings?
Flexigas gas pipe fittings are designed for Flexigas CSST gas pipework only. Flexigas pipe is flexible CSST for fixed gas pipework, not a loose appliance hose. The range includes threaded BSP unions, tees, elbows, reducing fittings, approved copper transition connectors, FG Bond and site accessories, with current brochures, data sheets and installation documents available from the downloads hub.
For merchants
Help customers find the right Flexigas pipe, fittings, copper connectors and accessories, with branch support for technical queries.
For specifiers
Use the current BSI Kitemark, BS EN 15266:2007, MOP 0.5 bar and DN15-DN50 documents when checking suitability.
Use Flexigas tubing and Flexigas fittings as a system. Do not mix Flexigas CSST or fittings with other manufacturers' CSST systems. Need the matrix? View technical downloads, read the installation guide or talk to technical support.
Flexigas CSST
Six sizes of corrugated stainless steel.
316L stainless core with a flame-retardant yellow polyethylene cover, UV stable for exposed and buried runs. DN15 to DN50, in boxed coils and long spools. Coil lengths vary by size, listed on each below.
DN15
- Outer Ø
- 18.1 mm
- Inner Ø
- 14.1 mm
- Wall
- 0.25 mm
- Support
- 1.2 m
Coil lengths15, 25, 50, 75 m
DN22
- Outer Ø
- 25.6 mm
- Inner Ø
- 21.4 mm
- Wall
- 0.25 mm
- Support
- 1.8 m
Coil lengths15, 25, 50, 75, 90, 100, 400 m
DN28
- Outer Ø
- 32 mm
- Inner Ø
- 27 mm
- Wall
- 0.25 mm
- Support
- 1.8 m
Coil lengths15, 20, 25, 50, 75, 90, 100, 400 m
DN32
- Outer Ø
- 38 mm
- Inner Ø
- 33 mm
- Wall
- 0.30 mm
- Support
- 2.5 m
Coil lengths15, 25, 50, 75, 90, 100, 350 m
DN40
- Outer Ø
- 50 mm
- Inner Ø
- 41 mm
- Wall
- 0.30 mm
- Support
- 2.5 m
Coil lengths15, 25, 50, 75, 100, 200 m
DN50
- Outer Ø
- 60 mm
- Inner Ø
- 50 mm
- Wall
- 0.30 mm
- Support
- 2.5 m
Coil lengths15, 25, 50, 75, 100, 150 m
All sizes BSI Kitemarked to EN 15266, maximum operating pressure 0.5 bar. Full sizing data in the data sheets, or run the gas pipe sizing calculator.
Fittings
Gas pipe fittings for Flexigas CSST.
130+ fitting codes in dezincification-resistant brass. A metal-to-metal self-flaring seal, no sealant or jointing compound. DN15 to DN50.
Male Union
Flexigas to male BSP thread.
Female Union
Flexigas to female BSP thread.
Flexigas Union
Flexigas to Flexigas, in-line joint or repair.
Reducing Union
Step between two Flexigas sizes.
Equal Tee
Three-way branch, equal sizes.
Reducing Tee
Branch with a reduced middle outlet.
Female Adapter Tee
Flexigas ends, female BSP middle branch.
Elbow
Flexigas to Flexigas 90 degree turn.
Male Elbow
Flexigas to male BSP, 90 degree.
Female Elbow
Flexigas to female BSP, 90 degree.
Winged Female Elbow
Wall-plate elbow for appliance drops.
Full fitting matrix and ordering codes in the fittings brochure. Flexigas fittings are only compatible with genuine Flexigas tubing. Mixing Flexigas with other manufacturers' CSST systems voids the Kitemark and warranty.
Copper connectors
Connect Flexigas to copper where the design requires it.
Copper transition connectors let competent installers move between the Flexigas system and compatible copper pipework through approved fittings. Straight unions, elbows and tees are available across DN15 to DN40 Flexigas connections and 15, 22, 28, 35, 42 and 54 mm copper options. Check sizing, route and installation guidance rather than selecting by nominal size alone.
Copper Straight Union
Flexigas to copper compression, in-line.
Copper Elbow
Flexigas to copper, 90 degree turn.
Copper / Flexigas Tee
Branch combining copper and Flexigas.
Innovation
FG Bond. Earth bonding built in.
The integrated FG Bond terminal threads onto the fitting and takes the main equipotential bonding conductor directly. No separate clamp, no bare tube section.
Tested by BSI to BS 951:2009, and meets BS 6891 and BS 7671 for equipotential bonding of gas pipework. One less step on every termination.
Accessories
Everything to cut, seal and handle it.
The tools and consumables that go with a Flexigas install, from the wheel cutter to the spool roller.
Tubing Cutter
Wheel cutter for clean square cuts in the valley.
Silicone Tape
Self-amalgamating tape for sealing exposed stainless.
Sleeve Stripper
Strips the PE cover cleanly to the last four corrugations.
Munsen Ring
Support accessory for site designs that require it.
Spool Roller
Tangle-free dispensing for 300 to 400m coils.
Spool Stand
For 50m and 75m boxed coils.
FlowFlex Adapter Set
Approved Flexigas to Flowflex transitions. Trained installers only; check compatible components.
Product support
Not sure which products you need?
Talk to the Flexigas technical team, or find your nearest stockist. We will help you spec the right pipe, fittings and accessories for the job.