Astralpool Drain of Ø 210 mm. All main drains made in plastic are provided with UV protected grilles. According to UNE 13451-1 standard, in public pools: Water passing speed 0.5 m/seg. Maximum suction velocity 1.5 m/sec, the minimum distance between drains: >2 m. Recommended use of the WARNER security system to detect any irregularities and effect automatic shutdown of pumps Side connection 2″. Body and grille in ABS, with self-adhesive gaskets, flange, and screws. Maximum flow: 13 m3/h. Item is available in White, Beige, Light Gray and Anthracite colors.