Brooklyn1 wrote:
"David Hare-Scott" wrote:
Kay Lancaster wrote:

And don't forget a backflow preventer.

Why?

In the US you don't need a back flow valve for water coming from a
hose bib, it already has a back flow valve from the main, the entire
residence is protected... back flow valves are required for automatic
irrigation systems because they are typically supplied directly from
the water main before the residential back flow valve. But not
knowing the codes where you live you may want to check... but water
from a hose bib I seriously doubt needs a backflow valve... you've
probably been using the hose bib to irrigate from since the house was
built

They are certainly required on hose bibbs where I live, on new construction. But
then again, most have no backflow valve on the water into the house.