Outer thread 2 ’, and interior for necklace Ø 50 mm.Made of white ABS.Installation is recommended with codes: 15658-15659.Available model for concrete or liner poolsNecklace version:For uter collar at Ø 63 mm, PN 6 and interior for necklace Ø 50 mm.Made of white ABS.The installation with crossamuros codes is recommended: 15661-15660.Only available for concrete pools.Multiflow systemThis system consists of the fact that the mouth ball is provided pre-marked with a series of diameters (14, 20 and 25) so that with the help of a punch (also supplied) and a mass can select one of them At the time of installation, thus obtaining several tails. RECOMMENDED maximum flow for a maximum passage speed of 4m/sec., According to standard EN 13451-1: Ø 14 mm = 2.2 m3/h, Ø 20 mm = 4.5 m3/h, Ø 25 mm = 7 m3/h Documents