We are replacing an PDQ M5 with a used Laserwash 360 in an area where our winters can get down to the low teens. Our old M5 lines are in a heated trough on the roof ( prefab concrete) with only the high pressure line coming down to the bridge with weep on during wringer. With the 360 We Will have about 5-6 ft of exposed hosing ( water, chem) in bay using the existing hole in the roof. We are worried about the exposed lines freezing. If Anyone has 360 running in cold climates can give us some pointers would be appreciated. In order reduce the length of exposed hoses we would have to brill a new hole through the concrete roof and fabricate some new trough to insulation and heat. Looking for ideas ands all comments Thanks