The item is made in the USA.
There is. It is a slightly different model no. BTW - I really like mine. George
Yeah, it runs on 120vac - so it won't work without it.
There is an ASTM specification for the type of PVC to use. It is available most places that sell white pvc. Just read installation instructions - note that the exhaust needs to be angled to the unit - it is a condensing exhaust -
That's what I use it for. I've got about 30 gal of water in 3 zones - I also have a solar tank in between - works well.