Hello all, I recently completed a new solution to freezing water. My implementation is different to most . Since the coup is 100+ feet from the nears water source I use a 40-gallon tank to feed automatic waterers both inside of our coup and out in the run. The run waterers are turned off in the colder months, but the waterers inside of our insulated coup are mounted directly below the water tank. Last year I surrounded the waterers and associated plumbing with a carpet remnant and placed a thermostatically controlled space heater inside. This worked very well but cost allot in electricity. So this year I rethought the situation and came up with a design where an aquarium heater is used to heat a small "plenum" of water. The plenum is created using 4" PVC pipe and fittings, mounted inside an insulated box. The waterers are installed directly to the PVC pipe. You can get the details with pictures on my web site (see my signature line below).