Vetus FTR330/19. Cooling Water Strainer. 330 series. All Vetus cooling water strainers have a transparent cover, allowing easy inspection of the filter without dismantling. Cleaning filter can be done quick and easily. The housing is made of polypropylene GF. These filters have different hose connections. Filter element is made from Heavy Duty Polyethylene and the cover is styrol/acryinitril SAN. ( hose 3/4 inch )