We wonder ourselves cause we boost to higher pressures, and to higher flows for longer time and they have never failed. We use them on booster suction, training hose, and we pressure test the hoses quarterly to stupid pressures and they've never failed... and to be honest they're abused cause they get bashed into metal boxes, left in the sun.
You know who the supplier is... go look at them, the SACFS should feel lucky that the cfs isn't just supplying them with the same equipment but looking around for improvements in equipment ie non conductive halligan tools, acetal couplings, improvement PPE.
The other to put this is... we in my company have the authority to buy what ever we want in respects to equipment. Acetal isn't the cheapest, but we still buy it, hell i got a pallet load of it in front of me at the moment. It isn't cheap chinese crap, its made in south Australia.
Moderators i know i ain't suppose to do this but for the benefit of a south Australian company and the people on here...
http://www.hydroflo.com.au/products/fittings.html And Bill they're right down the road from you... go to talk to him and see why we like them so much.
Like most new things they take awhile for people to stop being afraid of them. The SAMFS are looking at fazing in a few on trucks for evaluation and with the SACFS getting the adaptors from storz to safb its gonna become a staple on the truck...