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If you are concerned about freezing, then the simplest answer is to install a ball valve inside the house, where it is insulated, so that you can shut off and drain the water before it exist the house. As for connecting to the sillcock, 1" pex is a slightly unusual size; Most sillcocks are 3/4 inch but 1/2 inch sillcocks are also fairly common, so ...


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I doubt you need the second 90 (#3) - PEX is bendable at large radius, and if you work with that, you avoid fittings that may have freeze damage (PEX itself does not mind freezing.) If you think of it as if it was rigid pipe, you end up with a lot of fittings. If you work with its strengths, you can avoid many of those fittings, but you don't get tidy ...



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