Filling and draining your boiler (not the fresh water tank) Regardless of you owning a caravan or motor-home you will need to fill and drain the boiler. So why do you need to do this? Well in the winter it may freeze up and split or in the summer it make contain bacteria and make you ill. There are several types of drain valves but the principle is pretty much the same on any of them. © Art By Paul 2000-2018    This is the most commonly used valve. Basically it is a 3 way tap. When the yellow lever is in the down position (as shown left) the tap will allow you to fill your boiler. If the lever is in the upright position all the water in the boiler will drain onto the ground under your van. This is the valve normally found on a Whale system. it is a 3 way tap. When the yellow lever is in the down position (as shown left) the tap will allow you to fill your boiler. If the lever is in the upright position all the water in the boiler will drain onto the ground under your van. Please note that this valve is not always fitted in the position shown here. You valve may have to be turned to the left or right. This valve is a little more complicated to use. Instead of flipping a lever up or down you turn a blue lever left or right. So when you wish to fill the boiler you need to first push (and hold in) the blue round button on the front. Then at the same time turn the lever so it looks like the image A (right). The button should remain pressed in. Then if you wish to drain the boiler you twist the blue lever to the position shown in image B. The button will pop out and you will hear the water draining. Now this valve has an additional bonus. If the valve temperature falls below 5c the unit will automatically pop open and dump all the water from the boiler to protect it from frost etc. OK shall we begin. Filling (priming) the boiler To fill the boiler so you can use the taps and shower in your van do the following procedure. Fill up the aqua roll (water tank in a motor-home) and then attach it to the van via the water pump inlet. On a motor-home you normally wont need to do this as the pump is already attached.  Now go into the van and make sure the drain down lever is closed. Next switch the water pump on. This will normally be a switch inside the van. Now turn any HOT WATER tap on and wait. You will hear a gurgling sound as the boiler starts to fill. Once you have a steady flow of water coming out of the hot tap you simply turn the tap off. That’s it. Well until you run out of water. A little tip for you, refill the aqua roll or water tank before it is empty. That way you wont need to keep priming the boiler. Draining (wintering) the boiler After you have finished using the van for the summer etc you need to drain the boiler and all the taps. To do this you first disconnect the pump or switch it off at the control panel. Now go into the van and turn on every tap (including shower) so they are on both hot and cold. Finally turn the drain valve (whichever one you have) to the drain position. This will now cause all the water in the boiler/pipes and taps to drain away under the van. Remember to leave all the taps (and drain valve) open fr the whole period you are not using the van. Also be aware that some Alde boilers have two separate drain valves too. Draining the boiler Filling the boiler Filling/Draining