Our filter Housing is made of high quality PP and AS in confomity with FDA specification. Gum o-ring of housing can avoid leakage. Thicker housing and rib design can withstand much pressure. It can be used in food industries, RO reverse osmosis, lab, and water station. PP has excellent chemical resistance. It can be applicable to any liquid such as oil, alcohol, and fruit juice. Our filter housing has air release button (optional) different, Size brass fitting and BSP/NPT two type of thread.