I continue to have problems with the water lines on my Hunter 260. The back flow preventer or check valve fails and I cannot keep the line full of water. This causes me to pump the vacuum pump handle several times before I get a water flow. I have changed the valve in the past but it is a pain getting behind the sink bowl and working in a tight space.Has anyone tried to add a small electric pump to the water line so as not to depend on the back flow valve working correctly all the time? If so where did you install the pump and where did you tap into the 12 volt electrical current.