I am doing all grain brewing in my shop that is wood heated and does not have running water. I haul in about 5 - 5 gallon bucket of water to get ready for a brew day. Yesterday I did a Parti-Gyle and cilling of my wort became a major concern. I use an irrigation pump to push cold water from a 35 gallon garbage can filled with water and ice. I accually leave the can outside to let it freeze. I was able to chill two 5 gallon batches to 70 degrees in less than 20 minutes each with my IC. The key was the volume of cold water. I use the first five gallons of hot water to clean up and recirculate the rest. I will be able to use a hose come Spring.