Blowout
In searching through messages I see conflicting information on where to install the blowout for the system. Some posts say to place the blowout before the vac breaker, and others after.
I am also wondering what people do if they installl unions to be able to remove the vac breaker in the winter months. Since it doesn't seem that they make caps for unions, do people leave the pipes open ended for the winter, or is something else done. I would be kind of leary about leaving my mainline open for the winter months.
If it makes any difference I am going to be installing a RPZ valve.