I'm looking for suggestions. I've been in the Villages for 9 years and am frustrated about the time it takes for hot water to reach my showers, and sinks. We have an outdoor gas tankless water heater. It takes a minimum of 5 minutes sometimes longer . Having to wait that long is an extreme waist of water. I Believe one of the main causes of this problem is all the water pipes are run under the concrete slab and not properly insulated...Suggestions....Please!!