Thank you Chas, for the second post, and Zep.
I am a non technical person and was nervous about what I read which is why I cam here for help. As I understood it, the danger it from children getting attached to the drain not sucked into it. The strong suction makes it impossible to free the child.
Whwen I googled it, Vac Alert came up, that site had a collection of articles and that is why I posted from there.
I gather from Zep that Cal Spas addressed the danger.
I do have a brother named Jim, both of us are in NY.