Touble Check valve backflow preventors may be used in which locations? $($Select all that apply$)$

In locations that require an ASSE $1015$ backflow preventor.

Low hazard locations where no chemicals are used in the system.

linlocations where a direct coss$-$connection may occur.

In locations where the maximum intermittent operating pressure is $175$ psi and $180F.$

In direct cross$-$connection locations.