All of these units came with what we call “smart” switches, which control the flow and timing of various filling and flushing functions. Most allowed for about a half-gallon of water for a full flush and a 5-second delay between rinse and flush. On some units, the user could adjust the timing and volume of water required for flushing.
1. The Planus had a simple push-to-flush button with a tank-full indicator. Flushing was timed, and water use could be custom-set.
2. Testers found the Dometic toggle switches for “fill,” “flush,” and “empty” easy to use. The newest switch has a power and tank-full indicator.
3. The chrome-plated handle on the Raritan Atlantes is linked to an electronic switch that triggers a customizable flushing sequence.
4. The two-button Thetford-Tecma switch for the Silence Plus has timed fill and flush functions, as well as a full-tank light, an important feature.
