Aria by Thetford... for Recreational Vehicles of Distinction Fingertip convenience! To flush: Just press... then walk away! To add water: Press and hold. Great performance Ą Pulsating flush provides superior washdown. Microprocessor-driven dual nozzles create an oscillating flow. Ą Saves water. Uses about half as much per flush as the competition. Full-size comfort Ą Higher comfort level built in. The high-profile seat height is 17-1/2 inches - most-requested by RVers. Ą Elongated full residential-size seat and bowl allow owner customization.