reassembling after water pump replacement - quick question

["James LaLonde <deloreandmcxii@xxxx>" <deloreandmcxii@xxxx>]

In the course of replacing my Water pump, cleaning that awful area 
down in there, replacing fuel injectors, and doing a quick tune-up-- 
I'm also (of course) replacing all my vacuum hoses.

Should the green part of the vacuum switch (on the internal water 
pipe) rotate freely of the brass nut portion? It does on mine. Worth 
replacing either way? How about the rest of the switch/sensors down 
in there? I'll never be down that far again... so.... 

Other than that one bolt the water pump project went (is going) 
smoothly, if a bit cold out there in the garage.

Thanks for your help!
James LaLonde 4009