Okay east coast friends - this is Tucson's version of a deep freeze - we hit 27 degrees last night - on my early morning trail run - it was cold and icy! Brrrr - I mean just look at how frozen we were!
When it comes to this kind of "freeze" we see alot of fun ways people protect their plants and pipes outside - one of the most common and practicle ways to protect cactus - styrofoam cups - so you will see this alot around Tucson:
Other options are towels, blankets, tarps and fuzzy hats that do an excellent job protecting pool pumps and pipes! Whatever you choose - just know - cold freezes do not last long - in fact - by the weekend it will be 70 some degrees in Tucson - so you do not have to spend a lot of money on protecting pipes and plants - most important - just do it!