The recommended temperature of washing water is around that of the chemicals and usually at 20C or higher. During winter time though I have trouble controlling the temperature which for the running tap water is about 14-15C. What I do is double or triple the washing time in hopes that its enough. Is it enough? I print RC and develop film in the Jobo CPP-2. Its washing procedure is about this: after fix, I fill the tank with distilled water that has been tempered in the jobo and rotate it for five minutes. Then put the tank through the running water with a jobo hose which jets the water inside with pressure, for ten minutes. Then two minutes with Kodak Hypo Clear in the Jobo. Finally, another wash with tempered distilled water for five minutes and another with running tap water for ten minutes.