The Green Machine line of filter presses is available in sizes from 0.5–100 cu ft. While most commonly used for wastewater sludge dewatering, they are said to be an excellent choice for phosphate bath filtration. Continuous bath filtration eliminates the need to drain and desludge the phosphate tank. The quality of the phosphate coatings are improved and consistent throughout the life of the bath. Five models are available with either manual, semi-automatic or automatic closure. The press uses either gasketed or non-gasketed polypropylene plate.