Bruce,
Maybe if you move the lower valve right next to the tee, there would be enough water movement to keep the line from freezing. Another option would possibly be that heating tape they use in gutters. I think it is very low voltage and made to be used in wet conditions. better source and should benear you I think...
http://doitbest.com/shop/product.asp?msc...1103&sku=549851

Its not how well you do something,
Its how well you look doing it!