I purchased the hose clamp safety lock from Fumoto when I got the valve. It's a bear to get the hose clamp on or off with a pair of pliers. I found it was much easier to just use a small electrical tie wrap and snug it up in the slot just above the lever. You can thread the tie wrap before getting under the car and then just pull it into place once it is installed over the top of the valve. Cost, $3 per hundred oil changes.
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