Made of polyester resin and fiberglass. Excellent fi nish with gel-coat color RAL 8029. . The filter has been designed with higher coefficient of security, to guarantee a perfect operation. . The union of the two bodies of the filter is carried out through a sealed specially reinforced with fiberglass and polyester resin. . Large diameter plastic lid. . Cap to make easier the sand discharge into the filter. . Fitted with 1” collector arms and diffuser made from unplasticised. . Interior pipe with tubes of PN-16. . Sand purge of 2 1/2”. . Fitted with pressure gauge, air purge and manual water drain. . Connections to multiport valve with six positions filter, backwash, rinse, recirculate, waste and closed. . AstralPool Innovation: The filter has a security valve to avoid any over-pressure. . Maximum working pressure of 2,5 Kg/cm2.