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DIY Forum >> DIY - Plumbing Questions >> Gas Cylinder fittings
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Message started by CWatters on Jun 15th, 2018, 4:33pm

Title: Gas Cylinder fittings
Post by CWatters on Jun 15th, 2018, 4:33pm

I currently have a pair of 47kg propane cylinders on an auto changer feeding a 6 ring gas hob in the kitchen. The pigtails are all brass, this type..

https://gasproducts.co.uk/gas-regulators/pigtails/20-148-propane-gas-pigtail-pol-x-w20.html

I'd like to switch to smaller 19kg cylinders and to do that need longer pig tails. Was thinking of switching to this type of pigtail which don't need a spanner..

https://gasproducts.co.uk/gas-regulators/pigtails/gaslow-easy-fit-1-5m-propane-gas-hose.html

Obviously that makes the cylinders easier to pinch but I can fit a padlock to prevent that.

I'd like to know if anyone has experience of these? It looks like they have a rubber seal rather than brass on brass. Are they prone to leaking or any other issues I should know about?



Title: Re: Gas Cylinder fittings
Post by thescruff on Jun 16th, 2018, 12:52pm

Never seen them before so the first question would be there certification and compliance.

More importantly is the gas bottle size v the cooker rating.

The smaller the bottles the lower the off-take so they may not be suitable for your appliances.

example 19 kg bottle in brks.

Kg/hr 2.46 (1.37)
Kw 34 (19)
ft³/hr 46.4 (25.9)
M³/hr 1.27 ( 0.71)
Btu's/hr 116008 ( 64828)

The above is maximum off-takes at 15°C as you can see considerably lower.

Title: Re: Gas Cylinder fittings
Post by CWatters on Jun 18th, 2018, 5:06pm

Thanks. The pigtails seem to meet same standards as the all brass type.

Hadn't thought about the reduced gas flow rate, will investigate.

Title: Re: Gas Cylinder fittings
Post by CWatters on Jun 19th, 2018, 12:27pm

Good catch. With all rings going flat out I make the total 20kW.  Guess I best stick to the 47kg cylinders.

Think I will still go for longer hoses as it will be easier to connect the bottles. Currently it's very difficult as the hoses are a bit short and with  the tall bottles I'm having to work in a confined space under the fixed lid of the cabinet.

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