On Wed, 22 Mar 2017 19:25:04 GMT, "Tekkie®"
wrote:

Sorry, no ff will slam any valves shut. Please cite an example of your post.

+1 It happens slowly, little at a time from what I've seen. The
Painted Cow was in his/her/its usual _I hate everything mode_.

The local FD inspected our fire hydrants for operation, opened them
but that never damaged anything in my house. But I do have a PRV in
the garage.