The Certikin Hydroswim sand filter is available with either a top or a side mount multiport 6-way valve. They are manufactured from polyester resin and glass fibre.Hydroswim filters come with pressure gauge, manual water drain and a manual air vent and are fitted with a 6-way multiport valve. The maximum working pressure is 2.5Bar (test pressure 3 Bar) and the filtration velocity is 50m3/h/m2.