LIVE STEAM BOX For less than 60 bucks you can pasteurize endless amounts of sub with no worries. MATERIALS LIST PC 3/16th fuel line hose from autozone 3/16ths barb fitting from hardware store, go to the brass fitting shelf in plumbing 3-5 gallons of water 2 meat thermometers, One for overall tub temp, and one for quick checking the center of bags. A tote large enough to handle your max needs for pasteurization. I used a 50 gallon tote. A wire shelf for the bags of sub to sit on that will allow steam to flow around the bag. 3mil contractors bags work the best for this, as it makes it very easy to mix spawn in after the run and toss it around with out the bags ripping..Also the bags that are 1.4 mils generally melt a bit to themselves, which can make them difficult to open, also when aggressively mixing them I found that your fingers can poke holes in them and make a bit of a mess. Well worth the extra to get the 3mill IME Step 1: I went down to auto zone and picked up 10 feet of 3/16th fuel line hose. 8 bucks Step 2: I got a large tote, and a 3/16th barbed fitting and drilled a small hole in the tote to accept the fitting 20.00 bucks Step 3: Took an old meat thermometer and rtv-ed it to the lid.(after drilling the small hole for it to fit in to first) ((OPTIONAL)) Step 4: Put 3gallons for a small load and 4 1/2gallons of water for a large load in the PC. This is the cool part because you don't have to refill it. Step 5: Put lid on the pc Step 6: Hooked up the box to the PC via the fuel line hose. Step 7: You want to space the bags with jar lids so the steam can penetrate all around them. Run it to get up to temp and then pasteurize for the allotted time. It usually takes about 5-6 hrs with a full load and 2-3 with a small load. That's 145lbs of substrate, or 125 qts. the PC will run at 3 of 4 psi which is perfectly safe. debianlinux said: The 3psi is just the load imposed by the constriction of the tubing and its orifices. As long as the pathway from the PC into the chamber is not obstructed no dangerous pressures should develop. 3psi literally represents the pressure differential that is visible when steam moves from the PC into the tub. You would achieve considerably higher pressure to put your mouth on one end and lightly blow with the other end of the tubing still being open. You can cover it in blankets to regulate the temps and remove if it gets above where your comfortable with. This is a beautiful way to pasteurize bulk in your kitchen. Works like a charm every time. At some point I will convert a cooler and post those mods here as an alternative. spot check all the bags with a thermometer through the process a few times till you now what to expect from your set up. Once you hit 140 degrees back the insulators off and start your timer. I pasteurizer for 2 hours once I hit the temp. When done properly your bags will not get higher than 165 degrees. So you hit the sweet spot every time. I run my bags at 15qts per bag in these so 1 bag= 1 tub, squeeze out all the air and zip-tie the bags before loading. Tying knots LOOSE KNOTS works in pinch, but twisting and zip tying is much easier and less time consuming to get done. Time is a factor when doing these amounts, so the less time you spend dicking around the better. You can squeeze in 2 layers in these, just make sure you have space between all the bags so they all heat evenly. I prefer to do one layer at a time though. Here it is at the end of the run I would like to be able to do away with the blanket insulators, but It works like this without having to spend any money or ruining one of my fishin coolers. I love this machine so much I built another and doubled my capacity.