Do you have a photo of your that you could put up?
What are your outside temperatures since you put yours on? Do you have any idea of how hot they heat - not how hot they make the water, but how hot the little heater is to the touch.
Snapped a pic. Just got this done yesterday. It was 20 last night and no freezing, even in the valves.
EDITED TO ADD:
Temperature of the heater: You can touch it, hold your fingers there for a few seconds, but then you'll pull them away. I don't think it could actually burn you, but it is uncomfortable.
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