Sorry esshup, but we don't have to winterize much in Texas. I have read they blow air through the systems up north. One other mistake I made with my first drip system is not installing an injector. Algae and/or minerals will clog up the tubing, even the filters will clog. There is a fairly cheap & easy way to install a removable injector like this one
http://www.dripworksusa.com/store/fertilizer.php that I bought & retro-fitted to my Walnut trees...du
