Where can you buy a line blower?

[cleancloths]

I always thought that the 50/50 mix of ethylene glycol was based on an optimization of freeze and boiling protection, but that the maximum freeze protection took place at 70% antifreeze 30% water.

[Poconos]

The 70% could very well be true. Chemistry classes were way too long ago. I do remember something about the freezing point of a mixture being lower than either of the two alone but don't remember anything else. Maybe ChemGeek will see this and chime in.
Al

[waste]

Hate to interupt the discussion of what% antifreeze to use (I blow the lines clear and add ~ 1/2 gal), but the original ? was where to get a good vac/blower. The answer, Grangers (I've seen them up and down the east coast)