Australian high pressure water association Ausjet has issued a safety notice saying that whip check restraints are prone to failure, particularly where the energy of the hose is not adequately restrained upon failure of the hose joint.
It also said these particular restraints do not adequately restrain thermoplastic hoses due to low contact area and low coefficient of friction of the hose covering.
Ausjet recommended that steel or stainless steel "stocking" hose restraints be used in all instances, as no significant or unmanageable risks have been identified with them.