Our patented formula ends level sensor problems due to tissue waste sludge and soap scum build-up. Use this product regularly and prevent problems from occurring. As the world's leading manufacturer of mobile sanitation products for the RV, marine, camping and truck markets, THETFORD Corporation makes mobile living a more pleasant experience. THETFORD prides itself on creative design and is committed to the production of high-quality products that exceed the needs of a demanding marketplace. Looking for quality, performance, style and value. Look to THETFORD.