Doesn't it depend on the type of the elbow? I've seen the variable/adjustable elbows fail pretty much catastrophically twice, which means in my head they're completely unreliable.
OTOH I have a 'simple' elbow connected to my sidemount backup regulator; basically a regulator LP connector male & female. This has been completely reliable and I've not heard of them failing, certainly not any more failures than you'd get with a second stage to LP hose connection.
What type were those fizzy jacuzzi ones?
Not really into fluid dynamics so I will leave the flow restriction discussion to someone else
Ah, so the two I've observed leaking, plus the three you've seen leaking = five unreliable swivels. They seem to fall apart or loosen (seen both issues); one of them was on a twinset parked just outside of a mine entrance and "went off" as I climbed out. Honest guv, didn't touch it. Just shut down the valves (which should have done) and told the owner outside who said it had fallen to pieces as he fiddled with it.
The one I use is a simple 90 degree elbow. Nothing to fail except for the pretty reliable 'standard' regulator connectors.
Last edited by Wibs; 18-12-2018 at 05:53 AM.
Without wanting to skud myself but I've been using 90° LP swivels for years without issue, I simply keep them clean like any other bit of kit.
The only swivels that will still ensure that Apeks regs still pass ISO/CE/BS EN etc...testing are the Apeks ones. Aftermarket ones restrict gas flow.
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What's the 'official' name for regulator connector terminals on the end of hoses? i.e. the type