Best answer by Transparent
I think you need to clarify a couple of points before I can answer properly:
a. is it the mains power supply which are wanting to protect, or a particular power supply unit in a piece of household equipment?
b. do you have a "reverse voltage" from an identifiable source in mind, such as the back-emf from turning off an electric motor? Or is it generally the issue of having voltage spikes which could damage mains-connected equipment in the home?
I have a large motor on a well-pump which has an inrush current of 7A+ when starting up. So it will be producing a significant back-emf at switch-off.
I also have four different locations in my home where I have installed surge-suppression components. (And no, I don't mean 4-way extension blocks with "anti-surge" written on them!).
So I can speak from experience if either of these scenarios is akin to what you wish to find out.