Fittings for 1" PEX wouldn't get anywhere near a seal on Logstor. I use 1-1/4" crimp fittings and double the crimp rings since Logstor is thinner wall than 1-1/4" PEX but the same ID. A guy can get the crimp fittings from supplyhouse.com as of a month or two ago, if you have access to a crimper. DudaDiesel sells some 32mm compression x 1"FPT adapters that you could screw a copper sweat male adapter into for like $6 apiece. I don't like the compression outside because they can separate if the ground heaves, they can pull apart and leak. Have also seen folks just grab a regular old 1-1/4" barb fitting from the hardware store and heat the pipe up to pound them in, and use a hose clamp or two. Several ways to go about it really