hi all can anybody help with a solution for my water presure problem in my shower i know its not a power shower but i only have a trickle of water i have a sterling elite searcher TA 2007 with the showers at the back of the van i have cleaned all the pipework got a eco shower head but still no better does the water preasure come from the pump in the aqua roll or is the a onboard pump to preasure the shower i have a onboard water tank 40L but do not use the other taps are ok but if there not used for a while the water is not there when you turn the tap on it takes a few seconds to get the water though any ideas anyone