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.