We are going to purchase the 182-200 water accumulator. Evidently they are now standard equipment on the new units. I have seen a picture of one installed, but it doesn't show the hook-up. Does anyone have a picture, or a step by step description of what I need to do, or the addition parts I might need? How much does it weigh? What is it mounted to? Does the bladder force it empty when system is empty, or do you have to empty to winterize?