Read what www.pricewheeler.com www.brickwall.com says about MOVs.I
use a Brickwall model PW8R15 lightning strike/surge filter.
cuhulin

The MOV was a convinient adaptor.
I ADDED a 0.1uF capacitor ACROSS the MOV
and from nuetral to ground.
I thought about cutting the MOV out, and tossing it,
but what the heck, with as many as I added(20) it has
to help a little.
Terry