GasBank GB-EXT service hose for connecting an external propane cylinder to an M10 filling point - W21.8 LH, 1,5 m
- GasBank GB-EXT hose connects an external propane cylinder (W21.8 LH nut) to a filling point with female M10 thread, e.g. DISH. For leak testing a system without filling the tank. 1.5 m.
GasBank GB-EXT is a service hose that connects an external propane cylinder to a gas system through its M10 threaded filling point (e.g. DISH type). It lets you leak-test the system without filling the tank or cylinder at a station - during the test the gas comes from the connected cylinder.

What it is for
- connecting an external propane cylinder to the system through an M10 filling point
- leak testing the system without filling the tank or cylinder
- useful in the workshop and when servicing a motorhome, caravan or vehicle conversion with an LPG system

Connections
- cylinder side: nut with female W21.8 x 1/14 LH (left-hand) thread - for cylinder valves with a male W21.8 thread
- filling point side: knurled end with male M10x1.5 thread and seal - hand-screwed into a filling point with female M10 thread
- hose length: 1.5 m

How to connect
- make sure the cylinder valve is closed
- remove the filler cap and hand-screw in the M10 end so that the seal sits evenly
- screw the W21.8 nut onto the cylinder valve - the thread is left-hand, so turn it anticlockwise
- open the cylinder valve and carry out the test according to the procedure for your system
- after the test close the cylinder valve, disconnect the hose and refit the filler cap
Safety
- the hose is intended for LPG (propane)
- a gas system leak test should be carried out by a qualified person in line with the applicable regulations
- check the seals and the hose before use
- do not use the hose if you smell gas or the connection leaks
Matching GasBank products
- DISH M10 filling adapter (GB500)
- DISH to M10 adapter with filter
- ACME M10 filling adapter (GB501)
- BAYONET M10 filling adapter (GB502)
- EUROCONNECTOR M10 filling adapter (GB503)
- Set of three M10 adapters for all of Europe
Technical data
| Parameter | Value |
|---|---|
| Brand | GasBank |
| Product code | GB-EXT |
| Cylinder side connection | W21.8 x 1/14 LH nut (female, left-hand) |
| Filling point side connection | male M10x1.5 thread with seal |
| Fits | filling points with female M10x1.5 thread, e.g. DISH |
| Hose length | 1.5 m |
| Gas | LPG (propane) |
Questions and answers
What is the hose for?
For connecting an external propane cylinder to the system through an M10 filling point, e.g. to leak-test the system without filling.
Which cylinder does it fit?
Cylinders whose valve has a male W21.8 x 1/14 LH thread - the hose has a nut with a female left-hand thread.
Which filling point does it fit?
Filling points with a female M10 thread, e.g. DISH type - the end is screwed in by hand.
Is it for filling cylinders?
No. It is a service hose for connecting a cylinder during tests, not for decanting gas.
Manufacturer
GasBank (Carbon Zorro Sp. z o.o.), ul. Humańska 8, 02-789 Warszawa, Poland.














