Splashy New Products Debut at NAHB Show by Patrick J. Galvin Is your bathroom lavatory too high for the children or too high for you to wash your feet? These problems can now be resolved with the new "Lift" lav by Villeroy & Boch. Offered with a choice of five different bowls, its surface is 35 inches above the floor. But a simple push with a lever locks it in place to as low as 19 inches above the floor. This was a highlight of many new kitchen and bathroom products displayed at the annual convention of the National Association of Home Builders (NAHB), which attracted a record crowd of nearly 60,000. American Standard's new Ceramix Electronix faucets also scored